[go: up one dir, main page]

EP1582261A1 - Device for separating minerals - Google Patents

Device for separating minerals Download PDF

Info

Publication number
EP1582261A1
EP1582261A1 EP04008046A EP04008046A EP1582261A1 EP 1582261 A1 EP1582261 A1 EP 1582261A1 EP 04008046 A EP04008046 A EP 04008046A EP 04008046 A EP04008046 A EP 04008046A EP 1582261 A1 EP1582261 A1 EP 1582261A1
Authority
EP
European Patent Office
Prior art keywords
tank
grid
tray
siphon
ore
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP04008046A
Other languages
German (de)
French (fr)
Inventor
Pol Huart
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Genimin
Original Assignee
Genimin
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Genimin filed Critical Genimin
Priority to EP04008046A priority Critical patent/EP1582261A1/en
Priority to PCT/BE2005/000046 priority patent/WO2005094999A1/en
Priority to US11/547,523 priority patent/US20080190823A1/en
Publication of EP1582261A1 publication Critical patent/EP1582261A1/en
Priority to ZA200608143A priority patent/ZA200608143B/en
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B5/00—Washing granular, powdered or lumpy materials; Wet separating
    • B03B5/02—Washing granular, powdered or lumpy materials; Wet separating using shaken, pulsated or stirred beds as the principal means of separation
    • B03B5/10—Washing granular, powdered or lumpy materials; Wet separating using shaken, pulsated or stirred beds as the principal means of separation on jigs
    • B03B5/12—Washing granular, powdered or lumpy materials; Wet separating using shaken, pulsated or stirred beds as the principal means of separation on jigs using pulses generated mechanically in fluid
    • B03B5/16—Diaphragm jigs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B11/00—Feed or discharge devices integral with washing or wet-separating equipment

Definitions

  • the invention relates to apparatus for gravimetric concentration of ores.
  • the invention relates more particularly to a device for the artisanal concentration of ores, operating according to the known principle of setzage or jiggage, light structure, easily movable on the terrain and allowing a great ability to production while ensuring the best rate of recovery.
  • Setzage or jiggage is a well-known technique for the gravimetric concentration of solids comprising substances of densities or masses different volumes [eg an ore released from its constituents (naturally for the deposits alluvial and eluvial or after grinding), the remediation of a polluted ground of lead shots, or any other mixture of different materials].
  • ore means a solid material to the state of particles of various sizes and shapes, consisting of two or more minerals of densities different.
  • pulp will refer to a aqueous dispersion or suspension of the ore in water or another suitable liquid.
  • a current is usually superimposed of upward and continuous water, the function of which to adjust the suction during pulsations down.
  • a densimetric (or gravimetric) stratification of ore particles according to their mass volume a dense fraction sediments in the tank and a light fraction is evacuated with the pulp by overflow out of the bin.
  • the dense fraction is divided into two subfractions, depending on the particle size: the fine granulometries pass through the grid and gather in the bottom of the bin, while the coarser particles are retained by the grid and gather on top of it.
  • the apparatus further includes a device for feeding the tray with ore pulp and a device for generating the water pulse cycles discussed above.
  • This device consists of a piston or a membrane, located under the grid and operated by a suitable means.
  • This known craft apparatus has the advantage of a small footprint; it is easily movable and requires only a small amount of energy for its operation, compatible with that which can bring a man during a full day's work.
  • the means used to separate the dense and coarse subfraction, collected above the grid is to gather it in a siphon installed inside the tray, along the wall of the one -this.
  • a door operable from the outside makes it possible to clear an opening made in the wall of the tank, opposite the siphon and thus to evacuate the dense and coarse subfraction (or part of it).
  • This extraction means is essentially discontinuous, which constitutes an important disadvantage. Indeed, it does not predict in advance what will be the densimetric cut of the fraction taken and, a fortiori, it does not allow to achieve predetermined or adjustable densimetric cuts. In addition, this discontinuous extraction means does not allow operation in steady state state during which the filter bed retains constant properties.
  • the invention aims to remedy the disadvantages of jig known, described above, by providing a jig of new design, which is specially adapted to a artisanal exploitation.
  • An object of the invention is to provide a jig for artisanal mining, in which the extraction of a dense fraction of the ore does not cause disturbance in the stratification of the pulp in the sedimentation tank.
  • Another object of the invention is to provide a jig for artisanal mining, which allows to adjust at will the densimetric cut of the dense fraction withdrawn from the upper compartment of the tank.
  • a further object of the invention is to provide a jig for artisanal mining, the farm accommodates a cheap labor force.
  • An additional objective of the invention is to provide a jig for artisanal mining, including the operation requires only a moderate intake energy, while having high productivity.
  • the invention also aims to provide a jig for artisanal exploitation, whose productivity can be optimized in each particular case, depending on processed ore, its origin and the rate of sought concentration.
  • Another object of the invention is to provide a jig substantially universal, that we can adapt easily processed ore for its effectiveness to be optimal in each particular case, even for poor ores, or those in which the density of the useful matter differs little from those of other constituents of the ore.
  • the invention also aims to provide a jig having all the properties mentioned above, whose mass and size are reduced and which can easily be brought to a place operating.
  • the craft apparatus according to the invention belongs to the category of devices known under the name jig and designed for the concentration of ores, coals and other mineral or organic materials solid by setzage or jiggage. This technique is good known and its functional characteristics have been discussed above.
  • the apparatus according to the invention is a device craft.
  • apparatus craft a device of light and good design market, including the costs of investment, acquisition, maintenance and operation are within the reach of a craftsman (as usually defined) given in the dictionaries of the French language, especially in Le Petit Robert - dictionary of the French language, Dictionnaires Le Robert editions, Paris, June 2000, page 147), as opposed to apparatus which involve significant investments and a skilled workforce, large and expensive, usually out of reach of an individual normally fortune.
  • the tray constitutes the receptacle in which the setzage.
  • the shape of the tray is not critical. She can generally be prismatic, of rectangular section or square.
  • the bin is divided into two compartments superimposed, by a grid.
  • the grid can be horizontal or oblique.
  • the meshes of the grid are generally of uniform shape and size. They are preferably square, although other forms are compatible with the invention.
  • Fraction coarse particle size is a fraction granulometry whose particles have dimensions beyond the mesh of the grid and which are by consequently stopped by it.
  • the grid is calibrated function of the particle size sought for the fraction dense and fine ore processed. The optimum caliber of the grid will then depend on various parameters, processed ore, and may be determined easily by a person skilled in the art.
  • the compartment bottom of the tank or part of it advantageously the shape of a hopper.
  • the ferry and the grid must be made of a material capable of mechanically and chemically resist pulps intended to circulate there and to the forces of turbulence and abrasion caused by the pulsation of water through Grid.
  • the feeding device comprises a channel in which the ore is mixed with water for obtain the necessary dilution.
  • the channel is advantageously coated with a wear layer in one material capable of withstanding the abrasive action of ore spilled there. It can be joined to the ferry or alternatively, it may be attached to it removable way. It is preferably removable for to reduce the size of the craft apparatus during the transport.
  • the use of a removable entrance channel allows to adapt their shape, their dimensions and their resistance to abrasion, depending on the minerals treaties.
  • the use of a removable entrance channel allows to substitute a device different feed, for example a chute or a screw distributor.
  • the device for the pulsation of water constitutes a essential element for the realization of setzage. It is designed to project at regular intervals, a current from bottom to top through the tank grid, from way the pulp in the compartment upper tray is subjected to a succession of cycles pulsations alternately ascending and descending, as explained above.
  • the embodiment of this device is however not critical for the definition of the invention. He can for example understand a displaceable piston in an auxiliary chamber, lying in communication with the lower compartment of the tank or a flexible membrane that is arranged under the grid and whose central area is subject to a movement controlled alternative.
  • the lower compartment of the bin includes a device for extracting a dense and fine fraction ore.
  • This device is not critical for the design of the invention and may for example include a hopper closed by a valve.
  • the upper compartment of the tray is in communication with an overflow that is located at a higher level than the grid.
  • the overflow has for function to maintain the pulp level substantially constant in the tray, during normal operation of the craft apparatus.
  • the fraction of the pulp leaving the tank by the overflow normally contains a light fraction of the pulp.
  • the siphon is advantageously inside the tray and can then be formed by a vertical partition or oblique, plunging into the pulp, above the grate, opposite the aforementioned opening.
  • the lower edge of said partition is therefore located above the grid, but at a lower level than the overflow and the lower edge of the opening is at one level intermediate between that of the overflow and that of the lower edge of the partition.
  • Any other device equivalent can serve as a siphon.
  • the aforementioned opening of the wall of the tank is positioned in such a way that the siphon pulp can pour into the enclosure.
  • the spilling the siphon pulp into the enclosure does not affect the level of the pulp in the tray, since that the upper end of the enclosure is located at a higher level than the overflow of the tank.
  • the siphon includes, as explained above, a vertical partition which, during normal operation of the device artisanal, plunges into the pulp above the grate, next to the opening in the tank wall.
  • the partition is a movable rise vertically opposite said opening.
  • the dense fraction and coarse treated ore is gradually accumulating inside the enclosure. This must therefore be periodically drained of the ore it contains.
  • a wall basket is suspended openwork in the enclosure. The function of the basket is collect the ore particles that fall into the enclosure. It is therefore sufficient to periodically reassemble the basket to extract it from the enclosure and collect the ore contained therein, without impairing the functioning of the craft apparatus.
  • the craft apparatus according to the invention is a jig intended for artisanal exploitation. He can be easily designed to allow its handling by a only man and to be transported in light vehicles, on any type of road and enter easily in small carrier aircraft.
  • the tray and its grate, the feeding device, the overflow, the device for the pulsation of water, and the enclosure of the siphon forms a coherent whole that is mounted on feet.
  • the number of feet is normally at least three to make the whole isostatic. In practice, we usually uses at least four feet.
  • the aforementioned enclosure of the siphon is provided in at least one of the feet of the craft apparatus.
  • said enclosure and said siphon is provided in each foot.
  • This embodiment of the craft apparatus has the advantage of reducing its bulk and its mass and facilitate its assembly.
  • the components of the craft apparatus according to the invention are preferably made of materials light, capable of withstanding the constraints of construction site.
  • the construction is made of laminate epoxy / glass fiber by the technique of infusion under empty offering excellent weight / strength mechanical.
  • this one is formed of removable components allowing assembly and easy and fast disassembly of said apparatus.
  • This embodiment of the invention is especially well adapted to light craft equipment and easy handling, the container can then serve as receptacle to house the other components of the device, so as to minimize the volume at handle.
  • the craft apparatus includes a second tray, disposed downstream of the overflow.
  • the second bin is similar to the ferry described higher up and includes, like him, a grid that divides into an upper compartment and a compartment inferior.
  • This second ferry is also connected to a water pulsation device, which is designed so known in itself to project at regular intervals, a water flow from bottom to top through the tank grid, so that the pulp in the compartment upper tray is subjected to a succession of cycles pulsations alternately ascending and descending, as explained above.
  • This second ferry is also equipped with at least one siphon opening in at least one enclosure located outside the bin, as exposed more high. This embodiment of the invention allows improve the operating performance of the ores.
  • the flexible membrane can be vertical or oblique. It is preferred to implement a vertical membrane.
  • the membrane is moreover advantageously positioned so that both rooms are of substantially equal volumes.
  • the membrane may for example be mounted on a peripheral chassis that one introduced into the lower compartment of the tray for form the partition between the two aforementioned chambers.
  • a wall removable is attached to the top of the chassis, above of the grid, to allow to adjust the height discharge of the first compartment in the second.
  • the upper edge of said removable wall must be located below the level of the overfull.
  • the membrane can be actuated by any organ adequate, known. It is advantageous to use an organ known, combining a connecting rod-crank system. An organ combining a crank-rod system has the advantage to be manually operated by means of a pedalboard. This embodiment of the invention thus presents the advantageous peculiarity of being able to to be operated by an animal or a human without require other source of power.
  • the two rooms in the lower compartment of the bin are extended respectively by two hoppers and the actuator of the membrane is located between the two hoppers.
  • This embodiment of the invention provides a minimum space requirement. It has the advantage to be able to juxtapose a second ferry against the overflow threshold, this second tank being similar to the first tray and comprising a second membrane and a actuating device thereof.
  • the craft apparatus conforms to this variant embodiment of the invention is therefore a jig consisting of independent modules of two or more juxtaposed bins with their own mechanism of training which are likely to be assembled in series in order to increase the depletion of ores particularly difficult to concentrate.
  • This implementation series of multiple modules can maximize the productivity by controlling the recovery in each caisson, which follows an asymptotic law.
  • the craft apparatus according to the present invention the advantage of a small footprint and productivity high.
  • productivity of the craft apparatus according to the invention is at least 30 times greater than that obtained by the methods traditional craft and it allows rates of higher recovery.
  • the craft apparatus according to the invention various applications. He finds a particular application for the concentration of land or ores occurring naturally in the granular state or powder, such as products alluvial.
  • the craft apparatus according to the invention is especially suitable for deposits of this type located in geographical areas whose access is difficult, for example remote geographical areas channels of communication, as there are many on the African continent, including Democratic Republic of Congo.
  • the craft apparatus finds an application all particular for the artisanal concentration of ores of gold, of diamonds, and of any mineral of value, density differentiated from the environment (cassiterite, wolframite, coltan, tourmaline, garnets, chrysoberyl, spinel, zircon, tanzanite, rhodonite, ruby, sapphire, ...)
  • the apparatus shown in FIGS. 1 and 2 comprises a tray (1) with a substantially horizontal grid (2).
  • the grid (2) divides the bin into two compartments: an upper compartment (3) and a compartment lower (4).
  • An inclined channel (5) opens into the compartment superior (3). It is used for the admission of a pulp of a ore to be classified.
  • the upper compartment (3) is in communication with the overflow (6), which is located at a level less than the downstream end of the channel (5).
  • the channel (5) is fed with ore of specified particle size, at a suitable flow rate. This one must be determined by a series of preliminary tests, because it depends on the processed ore.
  • a water supply (not shown) dilutes this ore to arrive at a dilution of a feed pulp of approximately 1/1 (in weight).
  • a suitable pulsation device submits the water from the lower compartment (4) to upward pulsations, which chase her through the grid (2), in the upper compartment (3).
  • These pulsations generate a cycle of fluidizations and alternating decantations of the pulp, which results in to stratify the solid particles of the pulp into the upper compartment (3): the most densities penetrate the filter bed and reach the grate (2).
  • Dense grains with a lower grain size at the opening of the grid pass through it and fall in the hutch (7) where the valve (8) allows them to extract.
  • the light fraction of the pulp, whose grains do not reach the grid (2), is evacuated from the tank (1) by the overflow (6).
  • upper compartment (3) comprises a siphon (10), which comprises, on the one hand, a vertical partition (11) plunging into the pulp and, on the other hand, an opening (12) made through the tank wall (1). Partition (11) joins the opposite walls (13) and (14) of the tray (1). Its upper edge (15) is located at a level greater than overflow (6) and its edge lower section (16) is located above the grid (2), in providing a passage (17) for the ore grains accumulated on the grid (2).
  • siphon (10) comprises, on the one hand, a vertical partition (11) plunging into the pulp and, on the other hand, an opening (12) made through the tank wall (1). Partition (11) joins the opposite walls (13) and (14) of the tray (1). Its upper edge (15) is located at a level greater than overflow (6) and its edge lower section (16) is located above the grid (2), in providing a passage (17) for the ore grains accumulated on the grid (2).
  • the threshold of the opening (12) is formed by the ridge top (18) of a sliding panel (19) vertically and tightly along the wall of the tank (1). Said ridge (18) is normally located at a intermediate level between that of the threshold (6) and that of the lower edge (16) of the partition (11).
  • the opening (12) opens into an enclosure (20) which is located outside the bin (1).
  • the enclosure (20) has its upper end (21) located at a higher level higher than overflow (6), so as to avoid that it overflows.
  • the dense grains laminates on the grid (2) are driven through the passage (17) under the partition (11) and penetrate the siphon (10).
  • the grains are fluidized in the same way as those in the compartment (3). Their level will gradually increase until achieve a level of balance that depends on the density differential of the pulps in the compartment (3) and in the siphon (10).
  • the panel (19) is positioned under this level of balance of the pulp, in order to evacuate continuous grains that enter the siphon (10). The height positioning of the panel (19) defines the extraction rate of the siphon and thus determines the Density cut.
  • the positioning of the panel (19) is carried out at by means of a winch (22) (or an equivalent device), which the panel (19) is suspended via of a chain (23).
  • a basket (24) disposed in the bottom of the enclosure (20) is used to collect ore grains that enter said enclosure (20) via the opening (12).
  • the basket (24) is connected to a winch (25) by via a chain (26), to allow extract it periodically out of the enclosure (20) and recover the ore grains that were there accumulated.
  • the walls of the basket (24) are perforated, for allow the flow of water during its extraction from the enclosure (20). Before extracting the basket (24) from the enclosure (20), it is desirable to panel (19) to temporarily stop the passage of ore grains from the siphon (10) in the enclosure (20).
  • the grid (2) constitutes the bottom wall of a shallow basin, of which the side wall is applied against the wall of the tank 1.
  • This embodiment of the craft apparatus allows easy replacement of the pelvis. It also allows to use the pool alone, for example to filter a broth or ore pulp.
  • the container (1) is rectangular. He is mounted on four feet (34), (35), (36) and (37), which are respectively four corners of the bin (1).
  • the pulsation device comprises a vertical membrane (27) in the compartment lower (4) tray (1). The function and the operation of the membrane (27) will be explained more far.
  • the membrane (27) is mounted in a frame (28), to divide the compartment (4) into two chambers juxtaposed (29) and (30).
  • the chassis (28) is extended above the grid (2), so as to share the upper compartment (3) in two juxtaposed rooms (31) and (32).
  • the upper edge (33) of the frame (28) is located at a lower level than the overflow (6).
  • Both bedrooms (29) and (30) are extended each by a hopper or hutch (7), provided with a valve (8).
  • the two huts (7) meet along the ridge lower frame (28).
  • the channel (5) is a module which is clipped on the tray (1), so that its bottom wall is extended by the vertical partition (11) which plunges vertically in the chamber (31) of the tray (1).
  • the overflow (6) is extended by an inclined channel (44) which is clipped on the tray (1).
  • the wall of bottom of the channel (44) is extended by a vertical partition (11 ').
  • the partition (11 ') is similar to the partition (11) above and forms a siphon (10 ') in the vicinity of the downstream end of the tank (1).
  • the modules (5) and (44) are detached from the tank (1) and placed in it, in order to minimize the external volume.
  • the craft apparatus of Figures 3 to 8 includes four enclosures (20), which are located respectively inside the four legs (34), (35), (36) and (37).
  • the siphon (10) therefore comprises two vertical panels (19) movable vertically in front of openings corresponding (12) speakers (20) of the feet (34) and (36) ( Figures 3 and 8).
  • the siphon (10 ') comprises two vertical panels (19') which are movable vertically in front of openings (12 ') corresponding speakers (20) of the feet (35) and (37) ( Figure 3).
  • the membrane (27) has a shape circular. Any other appropriate form may, however, suit.
  • the membrane (27) constitutes the device for pulsation of the device.
  • a crank-handle system (38) ( Figures 4, 5 and 6) located in space between the two hutches (7) is connected to a pair of cables (39) and (40).
  • the two cables (39) and (40) pass respectively on two pulleys (41) and are respectively fixed to both faces of the membrane (27).
  • Actuation of the crank-rod system (38) causes a movement back and forth of the membrane (27), which generates pulsations in both chambers lower (29) and (30) of the tray (1).
  • the tray (1) is formed by the juxtaposition of two boxes (42) and (43), between which the frame (28) of the membrane (27) ( Figure 3).
  • the ore to be treated is poured into the intake channel (5), with water to form a pulp.
  • the pulp enters the chamber (31) of the tray (1), which is located above the grid (2).
  • the rod-crank system (38) is continuously actuated to deform the membrane (27) and cause pulsations in the tray.
  • a stratification of the ore is progressively carried out in the chamber (31), as explained above for the apparatus of FIG. 1.
  • the dense fraction of the ore sediments in the chamber (31) until reaching the grid (2).
  • the fine particles of the dense fraction pass through the grid (2), pass into the lower chamber (29) and are collected in the hutch (7) of the chamber (29).
  • the coarse particles of the above-mentioned dense fraction are stopped on the grid (2), where they accumulate gradually. As in the case of the apparatus of FIG. 1, these coarse particles gradually pass into the siphon (10) and from there into the two chambers (20) of the two feet (34) and (36), where they fall. in the baskets (24). A less dense fraction of the pulp passes above the frame (28) into the chamber (32).
  • Figure 7 shows the distribution of the dense fraction of the ore in the chamber (31), above the grid (2). The average density of the portion of this fraction that passes into the siphon (10) is greater than that of the portion remaining in the chamber (31), so that an equilibrium defined by the mathematical relationship is established.
  • h 1 .d 1 h 2 .d 2 , in which d 1 denotes the average density of the ore in the chamber (31), outside the siphon (10); d 2 is the average density of the ore in the siphon (10); h 1 denotes the height of the overflow (6) above the grid (2); and h 2 denotes the height of the threshold (18) of the opening (12).
  • the pulp is also subject to the pulsations generated by the membrane (27).
  • the dense particles that did not sediment in the room (31) sediment in the chamber (32).
  • the particles dense and thin cross the grid (2) and are collected in the hutch (7) which is located below of the room (30).
  • the big particles that are stopped by the grid (2) accumulate on it and gradually pass into the siphon (10 ') and from there in the enclosures (20) of the feet (35) and (37) where they fall into the baskets (24).
  • the fine fraction of pulp passes over the overflow threshold (6) and is evacuated through the outlet channel (44).
  • the tray (1) is formed by the juxtaposition of two boxes (42) and (43), between which the frame (28) of the membrane (27).
  • Both caissons (42) and (43) are assembled along juxtaposed flanges (no represented), which are glued or bolted.
  • Both boxes (42) and (43) may be of metal or synthetic resin. We prefer, for a question of weight, realize them in synthetic resin.
  • This design of the craft apparatus according to the invention allows a realization in composite materials by the vacuum impregnation process and allows integration in these two boxes the support of the mechanism drive (38) of the membrane (27).

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

The apparatus has a box (1) divided into upper and lower compartments (3, 4) by a grid. The upper compartment includes a siphon (10) that comprises of a vertical partition and an opening (12) which traverses the wall of the box. An overflow (6) evacuates a light fraction of pulp from the upper compartment. The opening extends from an enclosure (20) whose upper end is situated at a level higher than the overflow.

Description

Domaine de l'inventionField of the invention

L'invention se rapporte aux appareils pour la concentration gravimétrique des minerais.The invention relates to apparatus for gravimetric concentration of ores.

L'invention concerne plus spécialement un appareil pour la concentration artisanale de minerais, fonctionnant selon le principe connu du setzage ou jiggage, de structure légère, facilement déplaçable sur le terrain et permettant une grande capacité de production tout en assurant le meilleur taux de récupération.The invention relates more particularly to a device for the artisanal concentration of ores, operating according to the known principle of setzage or jiggage, light structure, easily movable on the terrain and allowing a great ability to production while ensuring the best rate of recovery.

Etat de la techniqueState of the art

Le setzage ou jiggage est une technique bien connue pour la concentration gravimétrique de matières solides comprenant des substances de densités ou masses volumiques différentes [par exemple un minerai libéré de ses constituants (naturellement pour les gisements alluvionnaires et éluvionnaires ou après broyage), l'assainissement d'une terre polluée de plombs de chasse, ou tout autre mélange de matières différentes].Setzage or jiggage is a well-known technique for the gravimetric concentration of solids comprising substances of densities or masses different volumes [eg an ore released from its constituents (naturally for the deposits alluvial and eluvial or after grinding), the remediation of a polluted ground of lead shots, or any other mixture of different materials].

Par convention, dans la suite du présent mémoire, le vocable « minerai » désignera une matière solide à l'état de particules de dimensions et de forme diverses, constitué de deux ou plusieurs minéraux de densités différentes. Le vocable « pulpe » désignera une dispersion ou suspension aqueuse du minerai dans de l'eau ou un autre liquide adéquat.By convention, in the remainder of this Memorandum, the term "ore" means a solid material to the state of particles of various sizes and shapes, consisting of two or more minerals of densities different. The word "pulp" will refer to a aqueous dispersion or suspension of the ore in water or another suitable liquid.

Dans la technique du setzage (ou jiggage), on soumet une pulpe à une succession de cycles de pulsations alternativement ascendante et descendante, à l'intérieur d'un bac. Une grille sensiblement horizontale sépare le bac en deux compartiments superposés et la pulpe à traiter est introduite dans le compartiment supérieur. L'ensemble des particules de la pulpe dans le compartiment supérieur du bac est appelé « lit filtrant ». Ce lit peut être constitué par les différents composants du minerai traité ou, en variante, par un matériau additionnel, de densité intermédiaire. Pendant les cycles de pulsations, les particules de la pulpe sont soumises à des accélérations brèves qui provoquent un cycle alterné de dilatation de la pulpe et de sédimentation des particules. Aux pulsations ascendantes et descendantes, on superpose habituellement un courant d'eau ascensionnel et continu, dont la fonction consiste à ajuster la succion au cours des pulsations descendantes. Par l'effet combiné des pulsations ascendantes et descendantes, il s'opère dans le bac une stratification densimétrique (ou gravimétrique) des particules du minerai en fonction de leur masse volumique : une fraction dense sédimente dans le bac et une fraction légère est évacuée avec la pulpe par débordement hors du bac. La fraction dense se répartit en deux sous-fractions, en fonction de la granulométrie : les fines granulométries traversent la grille et se rassemblent dans le fond du bac, tandis que les particules plus grossières sont retenues par la grille et se rassemblent au-dessus de celle-ci.In the technique of setzage (or jiggage), one submits a pulp at a succession of pulsation cycles alternately ascending and descending, indoors a ferry. A substantially horizontal grid separates the bin in two superimposed compartments and the pulp treat is introduced into the upper compartment. All the particles of the pulp in the upper compartment of the bin is called 'bed filtering ". This bed can be constituted by the different components of the ore processed or, alternatively, by a additional material, intermediate density. during the pulsation cycles, the particles of the pulp are subject to brief accelerations that cause a alternating cycle of dilation of the pulp and sedimentation of particles. At the upward pulsations and down, a current is usually superimposed of upward and continuous water, the function of which to adjust the suction during pulsations down. By the combined effect of pulsations ascending and descending, it takes place in the tray a densimetric (or gravimetric) stratification of ore particles according to their mass volume: a dense fraction sediments in the tank and a light fraction is evacuated with the pulp by overflow out of the bin. The dense fraction is divided into two subfractions, depending on the particle size: the fine granulometries pass through the grid and gather in the bottom of the bin, while the coarser particles are retained by the grid and gather on top of it.

Les appareils utilisés pour la mise en oeuvre de la technique du setzage sont parfois dénommés par le terme anglo-saxon « jigs ».The apparatus used for the implementation of the setzage technique are sometimes referred to by the term Anglo-Saxon "jigs".

Il existe actuellement une forte demande pour des jigs de conception légère, convenant à une exploitation artisanale à proximité de gisements de minerai immédiatement exploitables. Ce type d'appareil artisanal est notamment recherché par les orpailleurs, qui sont particulièrement intéressés par la facilité de déplacement de ces appareils et la facilité de leur exploitation. Une demande pour ce type d'appareils artisanaux légers provient aussi des prospecteurs de gisements à très faible teneur en matière utile, où l'analyse de grandes quantités de minerai est nécessaire pour obtenir des résultats représentatifs (c'est le cas de la prospection du diamant dont la teneur utile est concentrée dans quelques pierres)
Dans le document « Pan African Jig - Concentrateur de minerais » de la société SICOTIM, accessible sur le site Internet http://www.sicinter.com, on décrit un jig qui répond aux critères énoncés plus haut. Cet appareil artisanal connu comprend un bac qu'une grille sensiblement horizontale sépare en deux compartiments superposés. L'appareil comprend en outre un dispositif pour l'alimentation du bac avec une pulpe du minerai et un dispositif pour engendrer les cycles de pulsations d'eau dont il a été question plus haut. Ce dispositif consiste en un piston ou une membrane, situé sous la grille et manoeuvré par un moyen adéquat. Cet appareil artisanal connu a l'avantage d'un encombrement restreint ; il est aisément déplaçable et ne nécessite qu'un faible apport d'énergie pour son fonctionnement, compatible avec celle que peut apporter un homme pendant une journée complète de travail.There is currently a strong demand for lightweight design jigs, suitable for artisanal mining near mineable ore deposits. This type of craft is particularly sought after by miners, who are particularly interested in the ease of movement of these devices and the ease of operation. Demand for this type of light craft is also coming from prospectors of very low-grade deposits, where the analysis of large quantities of ore is necessary to obtain representative results (this is the case of prospecting for diamond whose useful content is concentrated in some stones)
In the document "Pan African Jig - Concentrator of Minerals" of the company SICOTIM, available on the website http://www.sicinter.com, we describe a jig that meets the criteria stated above. This known craft apparatus comprises a tray that a substantially horizontal grid separates into two superimposed compartments. The apparatus further includes a device for feeding the tray with ore pulp and a device for generating the water pulse cycles discussed above. This device consists of a piston or a membrane, located under the grid and operated by a suitable means. This known craft apparatus has the advantage of a small footprint; it is easily movable and requires only a small amount of energy for its operation, compatible with that which can bring a man during a full day's work.

Dans cet appareil artisanal connu, le moyen utilisé pour séparer la sous-fraction dense et grossière, rassemblée au-dessus de la grille consiste à rassembler celle-ci dans un siphon installé à l'intérieur du bac, le long de la paroi de celui-ci. Une porte manoeuvrable de l'extérieur permet de dégager une ouverture pratiquée dans la paroi du bac, en regard du siphon et d'évacuer ainsi la sous-fraction dense et grossière (ou une partie de celle-ci). Ce moyen d'extraction est essentiellement discontinu, ce qui constitue un désavantage important. En effet, il ne permet pas de prévoir à l'avance quelle sera la coupure densimétrique de la fraction prélevée et, a fortiori, il ne permet pas de réaliser des coupures densimétriques prédéterminées ou ajustables. En outre, ce moyen d'extraction discontinu ne permet pas un fonctionnement en état de régime permanent au cours duquel le lit filtrant conserve des propriétés constantes. De plus, à chaque ouverture de la porte un courant de pulpe quitte brutalement le bac, ce qui a pour effet de perturber la stratification de la pulpe dans le bac. Ces perturbations périodiques de la stratification de la pulpe dans le bac constituent un désavantage important de cet appareil connu, en nuisant notamment à son efficacité, à sa productivité et à son rendement énergétique. Cet appareil connu nécessite un personnel averti, compétent et, par conséquent, coûteux, ce qui grève le coût d'exploitation.
L'appareil artisanal connu qui vient d'être décrit n'est pas modulable. En d'autres termes, sa productivité est imposée par ses dimensions et il n'est pas possible de l'augmenter, ce qui constitue un autre désavantage de cet appareil.
Un désavantage supplémentaire de cet appareil connu réside dans son encombrement, qu'il n'est pas possible de réduire pour le transport. In this known artisanal apparatus, the means used to separate the dense and coarse subfraction, collected above the grid is to gather it in a siphon installed inside the tray, along the wall of the one -this. A door operable from the outside makes it possible to clear an opening made in the wall of the tank, opposite the siphon and thus to evacuate the dense and coarse subfraction (or part of it). This extraction means is essentially discontinuous, which constitutes an important disadvantage. Indeed, it does not predict in advance what will be the densimetric cut of the fraction taken and, a fortiori, it does not allow to achieve predetermined or adjustable densimetric cuts. In addition, this discontinuous extraction means does not allow operation in steady state state during which the filter bed retains constant properties. In addition, at each opening of the door a stream of pulp leaves abruptly the tray, which has the effect of disrupting the stratification of the pulp in the tray. These periodic disturbances of stratification of the pulp in the tank is a major disadvantage of this known apparatus, affecting in particular its efficiency, productivity and energy efficiency. This known device requires a knowledgeable, competent and, therefore, expensive staff, which strike the cost of exploitation.
The known craft apparatus which has just been described is not adjustable. In other words, its productivity is imposed by its size and it is not possible to increase it, which is another disadvantage of this device.
A further disadvantage of this known apparatus lies in its size, which it is not possible to reduce for transport.

Résumé de l'inventionSummary of the invention

L'invention vise à remédier aux désavantages du jig connu, décrit ci-dessus, en fournissant un jig de conception nouvelle, qui est spécialement adapté à une exploitation artisanale.The invention aims to remedy the disadvantages of jig known, described above, by providing a jig of new design, which is specially adapted to a artisanal exploitation.

Un objectif de l'invention consiste à fournir un jig pour exploitation artisanale, dans lequel l'extraction d'une fraction dense du minerai ne provoque pas de perturbation dans la stratification de la pulpe dans le bac de sédimentation.An object of the invention is to provide a jig for artisanal mining, in which the extraction of a dense fraction of the ore does not cause disturbance in the stratification of the pulp in the sedimentation tank.

Un autre objectif de l'invention consiste à fournir un jig pour exploitation artisanale, qui permette d'ajuster à volonté la coupure densimétrique de la fraction dense soutirée du compartiment supérieur du bac.Another object of the invention is to provide a jig for artisanal mining, which allows to adjust at will the densimetric cut of the dense fraction withdrawn from the upper compartment of the tank.

Un objectif supplémentaire de l'invention consiste à fournir un jig pour exploitation artisanale, dont l'exploitation s'accommode d'une main-d'oeuvre bon marché.A further object of the invention is to provide a jig for artisanal mining, the farm accommodates a cheap labor force.

Un objectif additionnel de l'invention consiste à fournir un jig pour exploitation artisanale, dont le fonctionnement ne nécessite qu'un apport modéré d'énergie, tout en ayant une productivité élevée.An additional objective of the invention is to provide a jig for artisanal mining, including the operation requires only a moderate intake energy, while having high productivity.

L'invention a aussi pour objectif de fournir un jig pour exploitation artisanale, dont la productivité peut être optimisée dans chaque cas particulier, en fonction du minerai traité, de son origine et du taux de concentration recherché.The invention also aims to provide a jig for artisanal exploitation, whose productivity can be optimized in each particular case, depending on processed ore, its origin and the rate of sought concentration.

Un autre objectif de l'invention est de fournir un jig sensiblement universel, que l'on puisse adapter facilement au minerai traité pour que son efficacité soit optimale dans chaque cas particulier, même pour les minerais pauvres, ou ceux dans lesquels la densité de la matière utile diffère peu de celles des autres constituants du minerai.Another object of the invention is to provide a jig substantially universal, that we can adapt easily processed ore for its effectiveness to be optimal in each particular case, even for poor ores, or those in which the density of the useful matter differs little from those of other constituents of the ore.

L'invention vise en outre à fournir un jig présentant l'ensemble des propriétés citées ci-dessus, dont la masse et l'encombrement sont réduits et qui puisse dès lors être amené facilement sur un lieu d'exploitation.The invention also aims to provide a jig having all the properties mentioned above, whose mass and size are reduced and which can easily be brought to a place operating.

En conséquence, l'invention concerne un appareil artisanal pour la concentration de minerais, comprenant

  • un bac divisé en un compartiment supérieur et un compartiment inférieur par une grille ;
  • un dispositif pour l'alimentation du compartiment supérieur du bac avec une pulpe du minerai ;
  • un dispositif pour la pulsation d'eau de bas en haut à travers la grille ;
  • un dispositif d'extraction d'une fraction dense et fine du minerai hors du compartiment inférieur du bac ;
  • un dispositif d'extraction d'une fraction dense et grossière du minerai hors du compartiment supérieur du bac, ce dispositif comprenant au moins un siphon qui est situé dans le bac et qui est en communication avec au moins une ouverture ménagée dans une paroi latérale du bac, au-dessus de la grille ; et
  • un trop-plein pour l'évacuation d'une fraction légère de la pulpe du compartiment supérieur du bac ;
l'appareil étant caractérisé en ce que l'ouverture susdite dans la paroi du bac débouche dans une enceinte dont l'extrémité supérieure est située à un niveau plus élevé que le trop-plein susdit.Accordingly, the invention relates to a craft apparatus for the concentration of ores, comprising
  • a bin divided into an upper compartment and a lower compartment by a grid;
  • a device for feeding the upper compartment of the tank with an ore pulp;
  • a device for pulsating water from bottom to top through the grid;
  • a device for extracting a dense and fine fraction of the ore from the lower compartment of the tank;
  • a device for extracting a dense and coarse fraction of the ore from the upper compartment of the tank, this device comprising at least one siphon which is located in the tank and which is in communication with at least one opening in a side wall of the tray, above the grate; and
  • an overflow for the evacuation of a light fraction of the pulp of the upper compartment of the tank;
the apparatus being characterized in that the aforesaid opening in the wall of the tray opens into an enclosure whose upper end is located at a higher level than the above-mentioned overflow.

L'appareil artisanal selon l'invention appartient à la catégorie des appareils connus sous la dénomination jig et conçus pour la concentration des minerais, charbons et autres matières minérales ou organiques solides par setzage ou jiggage. Cette technique est bien connue et ses caractéristiques fonctionnelles ont été exposées plus haut.The craft apparatus according to the invention belongs to the category of devices known under the name jig and designed for the concentration of ores, coals and other mineral or organic materials solid by setzage or jiggage. This technique is good known and its functional characteristics have been discussed above.

L'appareil selon l'invention est un appareil artisanal. On entend par l'expression « appareil artisanal », un appareil de conception légère et bon marché, dont les frais d'investissement, d'acquisition, d'entretien et d'exploitation sont à la portée d'un artisan (selon la définition qui en est généralement donnée dans les dictionnaires de la langue française, notamment dans Le Petit Robert - dictionnaire de la langue française, éditions Dictionnaires Le Robert, Paris, juin 2000, page 147), par opposition aux appareils industriels qui impliquent des investissements importants et une main d'oeuvre qualifiée, nombreuse et coûteuse, généralement hors de portée d'un individu normalement fortuné.The apparatus according to the invention is a device craft. The expression "apparatus craft ", a device of light and good design market, including the costs of investment, acquisition, maintenance and operation are within the reach of a craftsman (as usually defined) given in the dictionaries of the French language, especially in Le Petit Robert - dictionary of the French language, Dictionnaires Le Robert editions, Paris, June 2000, page 147), as opposed to apparatus which involve significant investments and a skilled workforce, large and expensive, usually out of reach of an individual normally fortune.

Dans l'appareil artisanal selon l'invention, le bac constitue le réceptacle dans lequel on effectue le setzage. La forme du bac n'est pas critique. Elle peut généralement être prismatique, de section rectangulaire ou carrée. Le bac est divisé en deux compartiments superposés, par une grille. La grille peut être horizontale ou oblique. Les mailles de la grille sont généralement de forme et de dimensions uniformes. Elles sont de préférence carrées, bien que d'autres formes soient compatibles avec l'invention.In the craft apparatus according to the invention, the tray constitutes the receptacle in which the setzage. The shape of the tray is not critical. She can generally be prismatic, of rectangular section or square. The bin is divided into two compartments superimposed, by a grid. The grid can be horizontal or oblique. The meshes of the grid are generally of uniform shape and size. They are preferably square, although other forms are compatible with the invention.

Dans le présent mémoire, on entend désigner par fraction fine du minerai, une fraction granulométrique dont les particules ont des dimensions qui leur permettent de passer à travers la grille. La fraction granulométrique grossière est une fraction granulométrique dont les particules ont des dimensions supérieures aux mailles de la grille et qui sont par conséquent arrêtées par elle. La grille est calibrée en fonction de la granulométrie recherchée pour la fraction dense et fine du minerai traité. Le calibre optimum de la grille va dès lors dépendre de divers paramètres, notamment du minerai traité, et peut être déterminé aisément par un homme du métier. Le compartiment inférieur du bac ou une partie de celui-ci a avantageusement la forme d'une trémie. Le bac et la grille doivent être réalisés en une matière capable de résister mécaniquement et chimiquement aux pulpes destinées à y circuler et aux forces de turbulence et d'abrasion provoquées par la pulsation de l'eau à travers la grille.In this memo, we mean by fine fraction of ore, a granulometric fraction whose particles have dimensions that allow to pass through the grid. Fraction coarse particle size is a fraction granulometry whose particles have dimensions beyond the mesh of the grid and which are by consequently stopped by it. The grid is calibrated function of the particle size sought for the fraction dense and fine ore processed. The optimum caliber of the grid will then depend on various parameters, processed ore, and may be determined easily by a person skilled in the art. The compartment bottom of the tank or part of it advantageously the shape of a hopper. The ferry and the grid must be made of a material capable of mechanically and chemically resist pulps intended to circulate there and to the forces of turbulence and abrasion caused by the pulsation of water through Grid.

Le dispositif servant à alimenter le bac avec la pulpe du minerai n'est pas critique pour la réalisation de l'invention. Dans une forme de réalisation avantageuse de l'invention, le dispositif d'alimentation comprend un chenal dans lequel le minerai est mélangé à de l'eau pour obtenir la dilution nécessaire. Le chenal est avantageusement revêtu d'une couche d'usure en un matériau capable de résister à l'action abrasive du minerai qui y est déversé. Il peut être solidarisé au bac ou, en variante, il peut être attaché à celui-ci de manière amovible. Il est de préférence amovible pour diminuer l'encombrement de l'appareil artisanal lors du transport. L'utilisation d'un chenal d'entrée amovible permet d'adapter leur forme, leurs dimensions et leur résistance à l'abrasion, en fonction des minerais traités. L'utilisation d'un chenal d'entrée amovible permet en outre d'y substituer un dispositif d'alimentation différent, par exemple une goulotte ou un distributeur à vis.The device used to feed the tray with the ore pulp is not critical for achieving of the invention. In an advantageous embodiment of the invention, the feeding device comprises a channel in which the ore is mixed with water for obtain the necessary dilution. The channel is advantageously coated with a wear layer in one material capable of withstanding the abrasive action of ore spilled there. It can be joined to the ferry or alternatively, it may be attached to it removable way. It is preferably removable for to reduce the size of the craft apparatus during the transport. The use of a removable entrance channel allows to adapt their shape, their dimensions and their resistance to abrasion, depending on the minerals treaties. The use of a removable entrance channel allows to substitute a device different feed, for example a chute or a screw distributor.

Le dispositif pour la pulsation d'eau constitue un élément essentiel pour la réalisation du setzage. Il est conçu pour projeter à intervalles réguliers, un courant d'eau de bas en haut à travers la grille du bac, de manière que la pulpe se trouvant dans le compartiment supérieur du bac soit soumise à une succession de cycles de pulsations alternativement ascendante et descendante, comme exposé plus haut. Le mode de réalisation de ce dispositif n'est toutefois pas critique pour la définition de l'invention. Il peut par exemple comprendre un piston déplaçable dans une chambre annexe, se trouvant en communication avec le compartiment inférieur du bac ou une membrane souple qui est disposée sous la grille et dont la zone centrale est soumise à un mouvement alternatif contrôlé.The device for the pulsation of water constitutes a essential element for the realization of setzage. It is designed to project at regular intervals, a current from bottom to top through the tank grid, from way the pulp in the compartment upper tray is subjected to a succession of cycles pulsations alternately ascending and descending, as explained above. The embodiment of this device is however not critical for the definition of the invention. He can for example understand a displaceable piston in an auxiliary chamber, lying in communication with the lower compartment of the tank or a flexible membrane that is arranged under the grid and whose central area is subject to a movement controlled alternative.

Le compartiment inférieur du bac comprend un dispositif pour l'extraction d'une fraction dense et fine du minerai. Ce dispositif n'est pas critique pour la conception de l'invention et peut par exemple comprendre une trémie obturée par un clapet.The lower compartment of the bin includes a device for extracting a dense and fine fraction ore. This device is not critical for the design of the invention and may for example include a hopper closed by a valve.

Le compartiment supérieur du bac est en communication avec un trop-plein qui est situé à un niveau plus élevé que la grille. Le trop-plein a pour fonction de maintenir le niveau de la pulpe sensiblement constant dans le bac, pendant le fonctionnement normal de l'appareil artisanal. De manière connue en soi, la fraction de la pulpe qui quitte le bac par le trop-plein contient normalement une fraction légère de la pulpe.The upper compartment of the tray is in communication with an overflow that is located at a higher level than the grid. The overflow has for function to maintain the pulp level substantially constant in the tray, during normal operation of the craft apparatus. In a manner known per se, the fraction of the pulp leaving the tank by the overflow normally contains a light fraction of the pulp.

Le dispositif d'extraction d'une fraction dense et grossière de minerai hors du bac constitue un élément constructif important de l'appareil artisanal selon l'invention. Selon l'invention, ce dispositif d'extraction comprend

  • d'une part, un siphon qui est en communication avec la partie supérieure du bac, ce siphon débouchant dans une ouverture qui est pratiquée à travers la paroi du bac, au-dessus de la grille ; et
  • d'autre part, une enceinte qui est située à l'extérieur du bac, de telle sorte que son extrémité supérieure soit un niveau plus élevé que celui de la grille.
The device for extracting a dense and coarse fraction of ore out of the tank constitutes an important constructive element of the craft apparatus according to the invention. According to the invention, this extraction device comprises
  • on the one hand, a siphon which is in communication with the upper part of the tray, this siphon opening into an opening which is made through the wall of the tray, above the grid; and
  • on the other hand, an enclosure which is located outside the tray, so that its upper end is a level higher than that of the grid.

Le siphon est avantageusement à l'intérieur du bac et peut alors être formé par une cloison verticale ou oblique, plongeant dans la pulpe, au-dessus de la grille, en regard de l'ouverture précitée. L'arête inférieure de ladite cloison se situe dès lors au-dessus de la grille, mais à un niveau inférieur à celui du trop-plein et l'arête inférieure de l'ouverture se situe à un niveau intermédiaire entre celui du trop-plein et celui de l'arête inférieure de la cloison. Tout autre dispositif équivalent peut servir de siphon.The siphon is advantageously inside the tray and can then be formed by a vertical partition or oblique, plunging into the pulp, above the grate, opposite the aforementioned opening. The lower edge of said partition is therefore located above the grid, but at a lower level than the overflow and the lower edge of the opening is at one level intermediate between that of the overflow and that of the lower edge of the partition. Any other device equivalent can serve as a siphon.

L'ouverture susdite de la paroi du bac est positionnée de telle manière que la pulpe du siphon puisse se déverser dans l'enceinte. Pendant le fonctionnement normal de l'appareil artisanal, le déversement de la pulpe du siphon dans l'enceinte n'affecte pas le niveau de la pulpe dans le bac, puisque que l'extrémité supérieure de l'enceinte est située à un niveau plus élevé que celui du trop-plein du bac.The aforementioned opening of the wall of the tank is positioned in such a way that the siphon pulp can pour into the enclosure. During the normal operation of the craft apparatus, the spilling the siphon pulp into the enclosure does not affect the level of the pulp in the tray, since that the upper end of the enclosure is located at a higher level than the overflow of the tank.

Dans une forme de réalisation particulière de l'appareil artisanal selon l'invention, le siphon comprend, comme exposé plus haut, une cloison verticale qui, pendant le fonctionnement normal de l'appareil artisanal, plonge dans la pulpe au-dessus de la grille, en regard de l'ouverture pratiquée dans la paroi du bac. Dans un mode d'exécution préféré de cette forme de réalisation, la cloison est une hausse déplaçable verticalement en regard de ladite ouverture. Ce mode d'exécution de l'invention permet d'ajuster la densité de coupure de la fraction grossière du minerai, soutirée par le trop-plein.In a particular embodiment of the craft apparatus according to the invention, the siphon includes, as explained above, a vertical partition which, during normal operation of the device artisanal, plunges into the pulp above the grate, next to the opening in the tank wall. In a preferred embodiment of this form of realization, the partition is a movable rise vertically opposite said opening. This mode embodiment of the invention makes it possible to adjust the density of cut of the coarse fraction of the ore, withdrawn by the overflow.

Pendant le fonctionnement normal de l'appareil artisanal selon l'invention, la fraction dense et grossière du minerai traité s'accumule progressivement dans l'enceinte. Celle-ci doit dès lors être périodiquement vidangée du minerai qu'elle contient. Dans une forme de réalisation avantageuse de l'appareil artisanal selon l'invention, on suspend un panier à paroi ajourée dans l'enceinte. Le panier a pour fonction de récolter les particules de minerai qui tombent dans l'enceinte. Il suffit dès lors de remonter périodiquement le panier pour l'extraire de l'enceinte et recueillir le minerai qu'il contient, sans nuire au fonctionnement de l'appareil artisanal.During normal operation of the device according to the invention, the dense fraction and coarse treated ore is gradually accumulating inside the enclosure. This must therefore be periodically drained of the ore it contains. In an advantageous embodiment of the apparatus according to the invention, a wall basket is suspended openwork in the enclosure. The function of the basket is collect the ore particles that fall into the enclosure. It is therefore sufficient to periodically reassemble the basket to extract it from the enclosure and collect the ore contained therein, without impairing the functioning of the craft apparatus.

L'appareil artisanal selon l'invention est un jig destiné à une exploitation artisanale. Il peut être facilement conçu pour permettre sa manutention par un seul homme et pour pouvoir être transporté dans des véhicules légers, sur tout type de route et entrer facilement dans des avions de type petits porteurs. A cet effet, dans une forme de réalisation préférée, le bac et sa grille, le dispositif d'alimentation, le trop-plein, le dispositif servant à la pulsation d'eau, et l'enceinte du siphon forme un ensemble cohérent qui est monté sur pieds. Le nombre de pieds est normalement d'au moins trois pour rendre l'ensemble isostatique. En pratique, on utilise généralement au moins quatre pieds.The craft apparatus according to the invention is a jig intended for artisanal exploitation. He can be easily designed to allow its handling by a only man and to be transported in light vehicles, on any type of road and enter easily in small carrier aircraft. In this effect, in a preferred embodiment, the tray and its grate, the feeding device, the overflow, the device for the pulsation of water, and the enclosure of the siphon forms a coherent whole that is mounted on feet. The number of feet is normally at least three to make the whole isostatic. In practice, we usually uses at least four feet.

Dans un mode de réalisation avantageux de la forme de réalisation préférée qui vient d'être décrite, l'enceinte précitée du siphon est ménagée dans au moins un des pieds de l'appareil artisanal. On préfère que ladite enceinte et ledit siphon soit ménagés dans chaque pied. Cette mode de réalisation de l'appareil artisanal présente l'avantage de réduire son encombrement et sa masse et de faciliter son assemblage.In an advantageous embodiment of the form preferred embodiment which has just been described, the aforementioned enclosure of the siphon is provided in at least one of the feet of the craft apparatus. We prefer that said enclosure and said siphon is provided in each foot. This embodiment of the craft apparatus has the advantage of reducing its bulk and its mass and facilitate its assembly.

Dans un autre mode de réalisation, qui est préféré, l'appareil artisanal selon l'invention comprend quatre pieds et le dispositif d'extraction de la fraction dense et grossière du minerai du compartiment supérieur du bac comprend

  • d'une part, quatre enceintes du type de celle définie plus haut, qui sont ménagées chacune dans un pied différent de l'appareil artisanal ; et
  • d'autre part, quatre siphons qui sont en communication, chacun avec une ouverture différente ménagée dans la paroi du bac, ces quatre ouvertures débouchant chacune dans une des quatre enceintes susdites.
In another embodiment, which is preferred, the craft apparatus according to the invention comprises four legs and the device for extracting the dense and coarse fraction of the ore from the upper compartment of the container comprises
  • on the one hand, four enclosures of the type defined above, which are each formed in a different foot of the craft apparatus; and
  • on the other hand, four siphons which are in communication, each with a different opening formed in the wall of the tray, these four openings each opening into one of the four aforesaid enclosures.

Les composants de l'appareil artisanal selon l'invention sont de préférence réalisés en matériaux légers, susceptibles de résister aux contraintes de chantier. A cet effet, dans une forme particulière de réalisation, la construction est réalisée en stratifié époxy/fibres de verre par le technique d'infusion sous vide offrant un excellent rapport poids/résistance mécanique.The components of the craft apparatus according to the invention are preferably made of materials light, capable of withstanding the constraints of construction site. For this purpose, in a particular form of realization, the construction is made of laminate epoxy / glass fiber by the technique of infusion under empty offering excellent weight / strength mechanical.

Dans une forme d'exécution supplémentaire de l'appareil artisanal selon l'invention, celui-ci est formé de composants amovibles permettant un assemblage et un désassemblage aisé et rapide dudit appareil. Cette forme de réalisation de l'invention est spécialement bien adaptée à des appareils artisanaux légers et de manutention aisée, le bac pouvant alors servir de réceptacle pour y loger les autres composants de l'appareil, de manière à minimiser le volume à manutentionner.In an additional embodiment of the craft apparatus according to the invention, this one is formed of removable components allowing assembly and easy and fast disassembly of said apparatus. This embodiment of the invention is especially well adapted to light craft equipment and easy handling, the container can then serve as receptacle to house the other components of the device, so as to minimize the volume at handle.

Dans une forme de réalisation particulière de l'invention, l'appareil artisanal comprend un second bac, disposé en aval du trop-plein. Dans cette forme de réalisation, le second bac est similaire au bac décrit plus haut et comprend, comme lui, une grille qui le divise en un compartiment supérieur et un compartiment inférieur. Ce second bac est par ailleurs relié à un dispositif de pulsation d'eau, qui est conçu de manière connue en soi pour projeter à intervalles réguliers, un courant d'eau de bas en haut à travers la grille du bac, de manière que la pulpe se trouvant dans le compartiment supérieur du bac soit soumise à une succession de cycles de pulsations alternativement ascendante et descendante, comme exposé plus haut. Ce second bac est par ailleurs équipé d'au moins un siphon débouchant dans au moins une enceinte située à l'extérieur du bac, comme exposé plus haut. Cette forme de réalisation de l'invention permet d'améliorer le rendement d'exploitation des minerais.In a particular embodiment of the invention, the craft apparatus includes a second tray, disposed downstream of the overflow. In this form of realization, the second bin is similar to the ferry described higher up and includes, like him, a grid that divides into an upper compartment and a compartment inferior. This second ferry is also connected to a water pulsation device, which is designed so known in itself to project at regular intervals, a water flow from bottom to top through the tank grid, so that the pulp in the compartment upper tray is subjected to a succession of cycles pulsations alternately ascending and descending, as explained above. This second ferry is also equipped with at least one siphon opening in at least one enclosure located outside the bin, as exposed more high. This embodiment of the invention allows improve the operating performance of the ores.

Dans une forme d'exécution préférée de l'appareil artisanal selon l'invention, le dispositif servant à la pulsation d'eau comprend

  • d'une part, une membrane souple et étanche séparant le compartiment inférieur du bac en deux chambres contiguës ; et
  • d'autre part, un organe d'actionnement de la membrane, conçu pour soumettre une zone centrale de celle-ci à un mouvement alternatif de va-et-vient.
In a preferred embodiment of the craft apparatus according to the invention, the device for the pulsation of water comprises
  • on the one hand, a flexible and waterproof membrane separating the lower compartment of the tray into two adjacent chambers; and
  • on the other hand, an actuating member of the membrane, adapted to subject a central zone thereof to a reciprocating back and forth motion.

Dans cette forme d'exécution préférée de l'appareil artisanal selon l'invention, la membrane souple peut être verticale ou oblique. On préfère mettre en oeuvre une membrane verticale. La membrane est par ailleurs avantageusement positionnée de manière que les deux chambres soient de volumes sensiblement égaux.In this preferred embodiment of the apparatus according to the invention, the flexible membrane can be vertical or oblique. It is preferred to implement a vertical membrane. The membrane is moreover advantageously positioned so that both rooms are of substantially equal volumes.

Pour la réalisation de la forme d'exécution préférée qui vient d'être décrite, la membrane peut par exemple être montée sur un châssis périphérique que l'on introduit dans le compartiment inférieur du bac pour former la cloison entre les deux chambres précitées. Dans un mode de réalisation spécialement avantageux, une paroi amovible est fixée à la partie supérieure du châssis, au-dessus de la grille, pour permettre de régler la hauteur de décharge du premier compartiment dans le second. Dans ce mode de réalisation avantageux, l'arête supérieure de ladite paroi amovible doit être située sous le niveau du trop-plein. For carrying out the preferred embodiment which has just been described, the membrane may for example be mounted on a peripheral chassis that one introduced into the lower compartment of the tray for form the partition between the two aforementioned chambers. In a particularly advantageous embodiment, a wall removable is attached to the top of the chassis, above of the grid, to allow to adjust the height discharge of the first compartment in the second. In this advantageous embodiment, the upper edge of said removable wall must be located below the level of the overfull.

Dans la forme d'exécution préférée définie ci-dessus, la membrane peut être actionnée par tout organe adéquat, connu. On utilise avantageusement un organe connu, associant un système bielle-manivelle. Un organe associant un système bielle-manivelle présente l'avantage de pouvoir être manoeuvré manuellement au moyen d'un pédalier. Cette forme de réalisation de l'invention présente ainsi la particularité avantageuse de pouvoir être actionné par un animal ou un être humain, sans nécessiter d'autre source motrice.In the preferred embodiment defined above, the membrane can be actuated by any organ adequate, known. It is advantageous to use an organ known, combining a connecting rod-crank system. An organ combining a crank-rod system has the advantage to be manually operated by means of a pedalboard. This embodiment of the invention thus presents the advantageous peculiarity of being able to to be operated by an animal or a human without require other source of power.

Dans une variante de réalisation avantageuse de la forme d'exécution préférée décrite ci-dessus, les deux chambres du compartiment inférieur du bac sont prolongées respectivement par deux trémies et l'organe d'actionnement de la membrane est localisé entre les deux trémies. Cette variante d'exécution de l'invention réalise un encombrement minimum. Elle présente l'avantage supplémentaire de pouvoir juxtaposer un second bac contre le seuil du trop-plein, ce second bac étant analogue au premier bac et comprenant une seconde membrane et un dispositif d'actionnement de celle-ci. En disposant ainsi deux ou plusieurs bacs en série l'un après l'autre, équipés chacun d'une membrane et d'un dispositif autonome d'actionnement de leur membrane, on peut moduler à volonté et facilement l'efficacité de l'appareil artisanal selon l'invention. L'appareil artisanal conforme à cette variante de réalisation de l'invention est dès lors un jig constitué de modules indépendants de deux ou plusieurs bacs juxtaposés disposant de leur propre mécanisme d'entraínement qui sont susceptibles d'être assemblés en série afin d'augmenter l'épuisement de minerais particulièrement difficiles à concentrer. Cette mise en série de plusieurs modules permet de maximiser la productivité en contrôlant la récupération dans chaque caisson, qui suit une loi asymptotique.In an advantageous embodiment of the invention, preferred embodiment described above, the two rooms in the lower compartment of the bin are extended respectively by two hoppers and the actuator of the membrane is located between the two hoppers. This embodiment of the invention provides a minimum space requirement. It has the advantage to be able to juxtapose a second ferry against the overflow threshold, this second tank being similar to the first tray and comprising a second membrane and a actuating device thereof. By disposing two or more bins in series one after the other, each equipped with a membrane and an autonomous device actuation of their membrane, it is possible to modulate at will and easily the efficiency of the craft apparatus according to the invention. The craft apparatus conforms to this variant embodiment of the invention is therefore a jig consisting of independent modules of two or more juxtaposed bins with their own mechanism of training which are likely to be assembled in series in order to increase the depletion of ores particularly difficult to concentrate. This implementation series of multiple modules can maximize the productivity by controlling the recovery in each caisson, which follows an asymptotic law.

L'appareil artisanal selon l'invention présente l'avantage d'un faible encombrement et d'une productivité élevée. En général, à même encombrement, la productivité de l'appareil artisanal selon l'invention est au moins 30 fois supérieure à celle obtenue par les méthodes artisanales traditionnelles et il permet des taux de récupération supérieurs.The craft apparatus according to the present invention the advantage of a small footprint and productivity high. In general, at the same size, productivity of the craft apparatus according to the invention is at least 30 times greater than that obtained by the methods traditional craft and it allows rates of higher recovery.

L'appareil artisanal selon l'invention trouve diverses applications. Il trouve notamment une application pour la concentration de terres ou de minerais se présentant naturellement à l'état granulaire ou pulvérulent, comme par exemple des produits alluvionnaires. L'appareil artisanal selon l'invention est spécialement indiqué pour des gisements de ce type situés dans des zones géographiques dont l'accès est difficile, par exemple des zones géographiques éloignées de voies de communication, comme il en existe de nombreuses sur le continent africain, notamment en République démocratique du Congo. L'appareil artisanal selon l'invention trouve une application toute particulière pour la concentration artisanale de minerais d'or, de diamant, et de tout minéral de valeur, de densité différenciée par rapport à l'environnement (cassitérite, wolframite, coltan, tourmaline, grenats, chrysobéryl, spinelle, zircon, tanzanite, rhodonite, rubis, saphir, ...)The craft apparatus according to the invention various applications. He finds a particular application for the concentration of land or ores occurring naturally in the granular state or powder, such as products alluvial. The craft apparatus according to the invention is especially suitable for deposits of this type located in geographical areas whose access is difficult, for example remote geographical areas channels of communication, as there are many on the African continent, including Democratic Republic of Congo. The craft apparatus according to the invention finds an application all particular for the artisanal concentration of ores of gold, of diamonds, and of any mineral of value, density differentiated from the environment (cassiterite, wolframite, coltan, tourmaline, garnets, chrysoberyl, spinel, zircon, tanzanite, rhodonite, ruby, sapphire, ...)

Brève description des figuresBrief description of the figures

Les figures présentées représentent une forme de réalisation de l'invention.

  • La figure 1 représente en section verticale et longitudinale, une forme de réalisation schématique de l'appareil artisanal selon l'invention ;
  • La figure 2 une coupe selon le plan II-II de la figure 1 ;
  • La figure 3 est une vue en plan d'une forme de réalisation préférée de l'appareil selon l'invention ;
  • La figure 4 est une section verticale selon le plan IV-IV de la figure 3 ;
  • La figure 5 est une vue en perspective de l'appareil artisanal des figures 3 et 4 ;
  • La figure 6 montre à grande échelle un détail de l'appareil des figures 3 à 5 ;
  • La figure 7 montre l'appareil des figures 3 à 6, en section verticale et longitudinale ; et
  • La figure 8 montre à plus grande échelle un détail de la figure 5.
    • The figures presented represent an embodiment of the invention.
  • Figure 1 shows in vertical and longitudinal section, a schematic embodiment of the craft apparatus according to the invention;
  • Figure 2 a section along the plane II-II of Figure 1;
  • Fig. 3 is a plan view of a preferred embodiment of the apparatus according to the invention;
  • Figure 4 is a vertical section on the plane IV-IV of Figure 3;
  • Figure 5 is a perspective view of the craft apparatus of Figures 3 and 4;
  • Figure 6 shows on a large scale a detail of the apparatus of Figures 3 to 5;
  • Figure 7 shows the apparatus of Figures 3 to 6, in vertical and longitudinal section; and
  • Figure 8 shows on a larger scale a detail of Figure 5.

    • Dans ces figures, les mêmes numéros de références désignent les mêmes éléments.In these figures, the same reference numbers designate the same elements.

    Description détaillée de modes de réalisation particuliersDetailed description of particular embodiments

    L'appareil représenté aux figures 1 et 2 comprend un bac (1) muni d'une grille sensiblement horizontale (2).The apparatus shown in FIGS. 1 and 2 comprises a tray (1) with a substantially horizontal grid (2).

    La grille (2) divise le bac en deux compartiments : un compartiment supérieur (3) et un compartiment inférieur (4).The grid (2) divides the bin into two compartments: an upper compartment (3) and a compartment lower (4).

    Un chenal incliné (5) débouche dans le compartiment supérieur (3). Il sert à l'admission d'une pulpe d'un minerai à classifier. An inclined channel (5) opens into the compartment superior (3). It is used for the admission of a pulp of a ore to be classified.

    Le compartiment supérieur (3) est en communication avec le trop-plein (6), qui est situé à un niveau inférieur à celui de l'extrémité d'aval du chenal (5).The upper compartment (3) is in communication with the overflow (6), which is located at a level less than the downstream end of the channel (5).

    Le compartiment inférieur (4) est prolongé, vers le bas, par une trémie ou huche (7) obturée par une vanne appropriée (8).The lower compartment (4) is extended towards the bottom, by a hopper or hutch (7) closed by a valve appropriate (8).

    Pendant le fonctionnement de l'appareil de la figure 1, on alimente le chenal (5) avec du minerai de granulométrie spécifiée, à un débit adéquat. Celui-ci doit être déterminé par une série d'essais préalables, car il dépend du minerai traité. Une alimentation d'eau (non représentée) dilue ce minerai pour arriver à une dilution d'une pulpe d'alimentation d'environ 1/1 (en poids).During the operation of the apparatus of the figure 1, the channel (5) is fed with ore of specified particle size, at a suitable flow rate. This one must be determined by a series of preliminary tests, because it depends on the processed ore. A water supply (not shown) dilutes this ore to arrive at a dilution of a feed pulp of approximately 1/1 (in weight).

    L'eau de la pulpe remplit la totalité du bac (1), jusqu'au niveau du trop-plein (6). Les particules de minerai pénètrent dans la pulpe.The water of the pulp fills the entire tank (1), to the level of the overflow (6). Particles of ore enter the pulp.

    Un dispositif de pulsation adéquat, non représenté à la figure 1, mais bien connu dans la technique du setzage, soumet l'eau du compartiment inférieur (4) à des pulsations ascendantes, qui la chassent à travers la grille (2), dans le compartiment supérieur (3). Ces pulsations engendrent un cycle de fluidisations et de décantations alternées de la pulpe, qui a pour résultat de stratifier les particules solides de la pulpe dans le compartiment supérieur (3) : les particules les plus denses pénètrent dans le lit filtrant et atteignent la grille (2). Les grains denses de granulométrie inférieure à l'ouverture de la grille traversent celle-ci et tombent dans la huche (7) d'où la vanne (8) permet de les extraire. A suitable pulsation device, not shown at Figure 1, but well known in the art of setzage, submits the water from the lower compartment (4) to upward pulsations, which chase her through the grid (2), in the upper compartment (3). These pulsations generate a cycle of fluidizations and alternating decantations of the pulp, which results in to stratify the solid particles of the pulp into the upper compartment (3): the most densities penetrate the filter bed and reach the grate (2). Dense grains with a lower grain size at the opening of the grid pass through it and fall in the hutch (7) where the valve (8) allows them to extract.

    Les grains denses, refusés par la grille (2) s'accumulent sur celle-ci et la pulpe se stratifie ainsi en couches de densités croissantes.Dense grains, refused by the grid (2) accumulate on it and the pulp thus stratifies in layers of increasing densities.

    La fraction légère de la pulpe, dont les grains n'atteignent pas la grille (2), est évacuée du bac (1) par le trop-plein (6).The light fraction of the pulp, whose grains do not reach the grid (2), is evacuated from the tank (1) by the overflow (6).

    Pendant les pulsations susdites de l'eau, il est recommandé de contrôler l'effet de succion au cours des phases de décantation au moyen d'une alimentation auxiliaire d'eau (9) sous la grille (2).During the aforementioned pulsations of water, it is recommended to control the suction effect during decantation phases by means of a feed auxiliary water (9) under the grate (2).

    Les grains denses qui s'accumulent sur la grille (2) doivent en être évacués. Conformément à l'invention, cette évacuation est effectuée de manière continue et contrôlée, ce qui présente le grand avantage de garantir un régime stationnaire à l'appareil. A cet effet, le compartiment supérieur (3) comprend un siphon (10), qui comprend, d'une part, une cloison verticale (11) plongeant dans la pulpe et, d'autre part, une ouverture (12) pratiquée à travers la paroi du bac (1). La cloison (11) joint les parois opposées (13) et (14) du bac (1). Son arête supérieure (15) est située à un niveau supérieur à celui du trop-plein (6) et son arête inférieure (16) est située au-dessus de la grille (2), en ménageant un passage (17) pour les grains de minerai accumulés sur la grille (2).The dense grains that accumulate on the grid (2) must be evacuated. According to the invention, this evacuation is carried out continuously and controlled, which has the great advantage of guaranteeing a steady state to the device. For this purpose, upper compartment (3) comprises a siphon (10), which comprises, on the one hand, a vertical partition (11) plunging into the pulp and, on the other hand, an opening (12) made through the tank wall (1). Partition (11) joins the opposite walls (13) and (14) of the tray (1). Its upper edge (15) is located at a level greater than overflow (6) and its edge lower section (16) is located above the grid (2), in providing a passage (17) for the ore grains accumulated on the grid (2).

    Le seuil de l'ouverture (12) est formé par l'arête supérieure (18) d'un panneau (19) qui peut coulisser verticalement et de manière étanche le long de la paroi du bac (1). Ladite arête (18) est normalement située à un niveau intermédiaire entre celui du seuil (6) et celui de l'arête inférieure (16) de la cloison (11). The threshold of the opening (12) is formed by the ridge top (18) of a sliding panel (19) vertically and tightly along the wall of the tank (1). Said ridge (18) is normally located at a intermediate level between that of the threshold (6) and that of the lower edge (16) of the partition (11).

    L'ouverture (12) débouche dans une enceinte (20) qui est située à l'extérieur du bac (1). L'enceinte (20) a son extrémité supérieure (21) située à un niveau plus élevé que celui du trop-plein (6), de manière à éviter qu'elle déborde.The opening (12) opens into an enclosure (20) which is located outside the bin (1). The enclosure (20) has its upper end (21) located at a higher level higher than overflow (6), so as to avoid that it overflows.

    Par la pression générée par l'épaisseur de la pulpe dans le compartiment supérieur (3), les grains denses stratifiés sur la grille (2) sont chassés à travers le passage (17) sous la cloison (11) et pénètrent dans le siphon (10). Dans le siphon (10), les grains sont fluidisés de la même manière que ceux du compartiment (3). Leur niveau va augmenter progressivement jusqu'à atteindre un niveau d'équilibre qui dépend de la densité différentielle des pulpes dans le compartiment (3) et dans le siphon (10). On positionne le panneau (19) sous ce niveau d'équilibre des pulpes, afin d'évacuer en continu les grains qui pénètrent dans le siphon (10). Le positionnement en hauteur du panneau (19) définit le débit d'extraction du siphon et détermine ainsi la coupure densimétrique.By the pressure generated by the thickness of the pulp in the upper compartment (3), the dense grains laminates on the grid (2) are driven through the passage (17) under the partition (11) and penetrate the siphon (10). In the siphon (10), the grains are fluidized in the same way as those in the compartment (3). Their level will gradually increase until achieve a level of balance that depends on the density differential of the pulps in the compartment (3) and in the siphon (10). The panel (19) is positioned under this level of balance of the pulp, in order to evacuate continuous grains that enter the siphon (10). The height positioning of the panel (19) defines the extraction rate of the siphon and thus determines the Density cut.

    Le positionnement du panneau (19) est réalisé au moyen d'un treuil (22) (ou d'un dispositif équivalent), auquel le panneau (19) est suspendu par l'intermédiaire d'une chaíne (23).The positioning of the panel (19) is carried out at by means of a winch (22) (or an equivalent device), which the panel (19) is suspended via of a chain (23).

    Un panier (24) disposé dans le fond de l'enceinte (20) sert à recueillir les grains de minerai qui pénètrent dans ladite enceinte (20) via l'ouverture (12). Le panier (24) est relié à un treuil (25) par l'intermédiaire d'une chaíne (26), pour permettre de l'extraire périodiquement hors de l'enceinte (20) et récupérer ainsi les grains de minerai qui s'y sont accumulés. Les parois du panier (24) sont ajourées, pour permettre l'écoulement de l'eau pendant son extraction de l'enceinte (20). Avant d'extraire le panier (24) de l'enceinte (20), il est souhaitable de remonter le panneau (19) pour arrêter momentanément le passage des grains de minerai du siphon (10) dans l'enceinte (20).A basket (24) disposed in the bottom of the enclosure (20) is used to collect ore grains that enter said enclosure (20) via the opening (12). The basket (24) is connected to a winch (25) by via a chain (26), to allow extract it periodically out of the enclosure (20) and recover the ore grains that were there accumulated. The walls of the basket (24) are perforated, for allow the flow of water during its extraction from the enclosure (20). Before extracting the basket (24) from the enclosure (20), it is desirable to panel (19) to temporarily stop the passage of ore grains from the siphon (10) in the enclosure (20).

    Dans une forme de réalisation particulière de l'appareil artisanal des figures 1 et 2, la grille (2) constitue la paroi de fond d'un bassin peu profond, dont la paroi latérale est appliquée contre la paroi du bac 1. Cette forme de réalisation de l'appareil artisanal permet le remplacement aisé du bassin. Elle permet en outre d'utiliser le bassin seul, par exemple pour filtrer un brouet ou une pulpe de minerai.In a particular embodiment of the craft apparatus of Figures 1 and 2, the grid (2) constitutes the bottom wall of a shallow basin, of which the side wall is applied against the wall of the tank 1. This embodiment of the craft apparatus allows easy replacement of the pelvis. It also allows to use the pool alone, for example to filter a broth or ore pulp.

    Dans la forme de réalisation préférée de l'invention, représentée aux figures 3 à 8, le bac (1) est rectangulaire. Il est monté sur quatre pieds (34), (35), (36) et (37), qui sont disposés respectivement aux quatre angles du bac (1). Le dispositif de pulsation comprend une membrane verticale (27) dans le compartiment inférieur (4) du bac (1). La fonction et le fonctionnement de la membrane (27) seront explicités plus loin. La membrane (27) est montée dans un châssis (28), de manière à diviser le compartiment (4) en deux chambres juxtaposées (29) et (30). Le châssis (28) est prolongé au-dessus de la grille (2), de manière à partager le compartiment supérieur (3) en deux chambres juxtaposées (31) et (32). L'arête supérieure (33) du châssis (28) est située à un niveau inférieur à celui du trop-plein (6).In the preferred embodiment of the invention, represented in FIGS. 3 to 8, the container (1) is rectangular. He is mounted on four feet (34), (35), (36) and (37), which are respectively four corners of the bin (1). The pulsation device comprises a vertical membrane (27) in the compartment lower (4) tray (1). The function and the operation of the membrane (27) will be explained more far. The membrane (27) is mounted in a frame (28), to divide the compartment (4) into two chambers juxtaposed (29) and (30). The chassis (28) is extended above the grid (2), so as to share the upper compartment (3) in two juxtaposed rooms (31) and (32). The upper edge (33) of the frame (28) is located at a lower level than the overflow (6).

    Les deux chambres (29) et (30) sont prolongées chacune par une trémie ou huche (7), munie d'une vanne (8). Les deux huches (7) se rejoignent le long de l'arête inférieure du châssis (28). Both bedrooms (29) and (30) are extended each by a hopper or hutch (7), provided with a valve (8). The two huts (7) meet along the ridge lower frame (28).

    Le chenal (5) est un module qui vient se clipser sur le bac (1), de telle sorte que sa paroi de fond se prolonge par la cloison verticale (11) qui plonge verticalement dans la chambre (31) du bac (1).The channel (5) is a module which is clipped on the tray (1), so that its bottom wall is extended by the vertical partition (11) which plunges vertically in the chamber (31) of the tray (1).

    Le trop-plein (6) est prolongé par un chenal incliné (44) qui vient se clipser sur le bac (1). La paroi de fond du chenal (44) se prolonge par une cloison verticale (11'). La cloison (11') est similaire à la cloison (11) précitée et forme un siphon (10') au voisinage de l'extrémité d'aval du bac (1).The overflow (6) is extended by an inclined channel (44) which is clipped on the tray (1). The wall of bottom of the channel (44) is extended by a vertical partition (11 '). The partition (11 ') is similar to the partition (11) above and forms a siphon (10 ') in the vicinity of the downstream end of the tank (1).

    Pour le transport de l'appareil artisanal des figures 3 à 8, les module (5) et (44) sont détachés du bac (1) et déposés dans celui-ci, afin de minimiser le volume extérieur.For the transport of the craft apparatus of FIGS. 3 to 8, the modules (5) and (44) are detached from the tank (1) and placed in it, in order to minimize the external volume.

    L'appareil artisanal des figures 3 à 8 comprend quatre enceintes (20), qui sont localisées respectivement à l'intérieur des quatre pieds (34), (35), (36) et (37). Le siphon (10) comprend dès lors deux panneaux verticaux (19) déplaçables verticalement devant des ouvertures correspondantes (12) des enceintes (20) des pieds (34) et (36) (figures 3 et 8). De manière similaire, le siphon (10') comprend deux panneaux verticaux (19') qui sont déplaçables verticalement devant des ouvertures (12') correspondantes des enceintes (20) des pieds (35) et (37) (figure 3).The craft apparatus of Figures 3 to 8 includes four enclosures (20), which are located respectively inside the four legs (34), (35), (36) and (37). The siphon (10) therefore comprises two vertical panels (19) movable vertically in front of openings corresponding (12) speakers (20) of the feet (34) and (36) (Figures 3 and 8). Similarly, the siphon (10 ') comprises two vertical panels (19') which are movable vertically in front of openings (12 ') corresponding speakers (20) of the feet (35) and (37) (Figure 3).

    Aux figures 3 à 8, la membrane (27) a une forme circulaire. Toute autre forme appropriée peut toutefois convenir. La membrane (27) constitue le dispositif de pulsation de l'appareil. A cet effet, un système bielle-manivelle (38) (figures 4, 5 et 6) localisé dans l'espace libre entre les deux huches (7) est relié à une paire de câbles (39) et (40). Les deux câbles (39) et (40) passent respectivement sur deux poulies de renvoi (41) et sont fixés respectivement aux deux faces de la membrane (27). L'actionnement du système bielle-manivelle (38) provoque un mouvement de va et vient de la membrane (27), qui engendre des pulsations dans les deux chambres inférieures (29) et (30) du bac (1).In FIGS. 3 to 8, the membrane (27) has a shape circular. Any other appropriate form may, however, suit. The membrane (27) constitutes the device for pulsation of the device. For this purpose, a crank-handle system (38) (Figures 4, 5 and 6) located in space between the two hutches (7) is connected to a pair of cables (39) and (40). The two cables (39) and (40) pass respectively on two pulleys (41) and are respectively fixed to both faces of the membrane (27). Actuation of the crank-rod system (38) causes a movement back and forth of the membrane (27), which generates pulsations in both chambers lower (29) and (30) of the tray (1).

    Dans l'appareil représenté aux figures 3 à 8, le bac (1) est formé par la juxtaposition de deux caissons (42) et (43), entre lesquels on insère le châssis (28) de la membrane (27) (Figure 3).In the apparatus shown in FIGS. 3 to 8, the tray (1) is formed by the juxtaposition of two boxes (42) and (43), between which the frame (28) of the membrane (27) (Figure 3).

    Pendant le fonctionnement de l'appareil artisanal des figures 3 à 8, on déverse le minerai à traiter dans le chenal d'admission (5), avec de l'eau pour former une pulpe. La pulpe pénètre dans la chambre (31) du bac (1), qui est située au-dessus de la grille (2). On actionne en permanence le système bielle-manivelle (38) pour déformer la membrane (27) et provoquer les pulsations dans le bac. Une stratification du minerai est progressivement réalisée dans la chambre (31), comme exposé plus haut pour l'appareil de la figure 1. La fraction dense du minerai sédimente dans la chambre (31) jusqu'à atteindre la grille (2). Les fines particules de la fraction dense traversent la grille (2), passent dans la chambre inférieure (29) et sont recueillies dans la huche (7) de la chambre (29). Les particules grossières de la fraction dense susdite sont arrêtées sur la grille (2), où elles s'accumulent progressivement. Comme dans le cas de l'appareil de la figure 1, ces particules grossières passent progressivement dans le siphon (10) et, de là, dans les deux enceintes (20) des deux pieds (34) et (36), où elles tombent dans les paniers (24). Une fraction moins dense de la pulpe passe au-dessus du châssis (28) jusque dans la chambre (32). La figure 7 montre la distribution de la fraction dense du minerai dans la chambre (31), au-dessus de la grille (2). La masse spécifique moyenne de la partie de cette fraction qui passe dans le siphon (10) est supérieure à celle de la partie restante dans la chambre (31), de telle sorte qu'il s'établit un équilibre défini par la relation mathématique h1.d1 = h2.d2, dans laquelle
       d1 désigne la masse spécifique moyenne du minerai dans la chambre (31), en dehors du siphon (10) ;
       d2 désigne la masse spécifique moyenne du minerai dans le siphon (10) ;
       h1 désigne la hauteur du trop-plein (6) au-dessus de la grille (2) ; et
       h2 désigne la hauteur du seuil (18) de l'ouverture (12).    During operation of the artisanal apparatus of Figures 3 to 8, the ore to be treated is poured into the intake channel (5), with water to form a pulp. The pulp enters the chamber (31) of the tray (1), which is located above the grid (2). The rod-crank system (38) is continuously actuated to deform the membrane (27) and cause pulsations in the tray. A stratification of the ore is progressively carried out in the chamber (31), as explained above for the apparatus of FIG. 1. The dense fraction of the ore sediments in the chamber (31) until reaching the grid (2). The fine particles of the dense fraction pass through the grid (2), pass into the lower chamber (29) and are collected in the hutch (7) of the chamber (29). The coarse particles of the above-mentioned dense fraction are stopped on the grid (2), where they accumulate gradually. As in the case of the apparatus of FIG. 1, these coarse particles gradually pass into the siphon (10) and from there into the two chambers (20) of the two feet (34) and (36), where they fall. in the baskets (24). A less dense fraction of the pulp passes above the frame (28) into the chamber (32). Figure 7 shows the distribution of the dense fraction of the ore in the chamber (31), above the grid (2). The average density of the portion of this fraction that passes into the siphon (10) is greater than that of the portion remaining in the chamber (31), so that an equilibrium defined by the mathematical relationship is established. h 1 .d 1 = h 2 .d 2 , in which
    d 1 denotes the average density of the ore in the chamber (31), outside the siphon (10);
    d 2 is the average density of the ore in the siphon (10);
    h 1 denotes the height of the overflow (6) above the grid (2); and
    h 2 denotes the height of the threshold (18) of the opening (12).

    Dans la chambre (32), la pulpe est également soumise aux pulsations générées par la membrane (27). Les particules denses qui n'ont pas sédimenté dans la chambre (31) sédimentent dans la chambre (32). Les particules denses et fines traversent la grille (2) et sont recueillies dans la huche (7) qui est située au-dessous de la chambre (30). Les grosses particules qui sont arrêtées par la grille (2) s'accumulent sur celle-ci et passent progressivement dans le siphon (10') et, de là, dans les enceintes (20) des pieds (35) et (37) où elles tombent dans les paniers (24). La fraction fine de la pulpe passe au-dessus du seuil du trop-plein (6) et est évacuée par le chenal de sortie (44). In the chamber (32), the pulp is also subject to the pulsations generated by the membrane (27). The dense particles that did not sediment in the room (31) sediment in the chamber (32). The particles dense and thin cross the grid (2) and are collected in the hutch (7) which is located below of the room (30). The big particles that are stopped by the grid (2) accumulate on it and gradually pass into the siphon (10 ') and from there in the enclosures (20) of the feet (35) and (37) where they fall into the baskets (24). The fine fraction of pulp passes over the overflow threshold (6) and is evacuated through the outlet channel (44).

    Comme exposé plus haut, dans l'appareil des figures 3 à 8, le bac (1) est formé par la juxtaposition de deux caissons (42) et (43), entre lesquels on insère le châssis (28) de la membrane (27). Les deux caissons (42) et (43) sont assemblés le long de brides juxtaposées (non représentées), qui sont collées ou boulonnées. Les deux caissons (42) et (43) peuvent être en métal ou en une résine de synthèse. On préfère, pour une question de poids, les réaliser en résine de synthèse. Cette conception de l'appareil artisanal selon l'invention permet une réalisation en matériaux composites par le procédé d'imprégnation sous vide et permet d'intégrer dans ces deux caissons le support du mécanisme d'entraínement (38) de la membrane (27).As explained above, in the apparatus of the figures 3 to 8, the tray (1) is formed by the juxtaposition of two boxes (42) and (43), between which the frame (28) of the membrane (27). Both caissons (42) and (43) are assembled along juxtaposed flanges (no represented), which are glued or bolted. Both boxes (42) and (43) may be of metal or synthetic resin. We prefer, for a question of weight, realize them in synthetic resin. This design of the craft apparatus according to the invention allows a realization in composite materials by the vacuum impregnation process and allows integration in these two boxes the support of the mechanism drive (38) of the membrane (27).

    Claims (10)

    Appareil artisanal pour la concentration de minerais, comprenant un bac (1) divisé en un compartiment supérieur (3) et un compartiment inférieur (4) par une grille (2) ; un dispositif (5) pour l'alimentation du compartiment supérieur du bac avec une pulpe du minerai ; un dispositif (27, 38, 39, 40, 41) pour la pulsation d'eau de bas en haut à travers la grille ; un dispositif d'extraction (8) d'une fraction dense et fine du minerai hors du compartiment inférieur du bac ; un dispositif d'extraction d'une fraction dense et grossière du minerai hors du compartiment supérieur du bac, ce dispositif comprenant au moins un siphon (10) qui est situé dans le bac et qui est en communication avec au moins une ouverture (12) ménagée dans une paroi latérale du bac, au-dessus de la grille ; et un trop-plein (6) pour l'évacuation d'une fraction légère de la pulpe du compartiment supérieur du bac ; caractérisé en ce que l'ouverture (12) susdite dans la paroi du bac débouche dans une enceinte (20) dont l'extrémité supérieure (21) est située à un niveau plus élevé que le trop-plein susdit. Artisanal apparatus for the concentration of ores, comprising a trough (1) divided into an upper compartment (3) and a lower compartment (4) by a grid (2); a device (5) for feeding the upper compartment of the tank with an ore pulp; a device (27, 38, 39, 40, 41) for pulsating water upwardly through the grid; an extraction device (8) of a dense and fine fraction of the ore out of the lower compartment of the tank; a device for extracting a dense and coarse fraction of the ore from the upper compartment of the tank, this device comprising at least one siphon (10) which is located in the tank and which is in communication with at least one opening (12) formed in a side wall of the tray, above the grid; and an overflow (6) for the evacuation of a light fraction of the pulp of the upper compartment of the tank; characterized in that the opening (12) aforesaid in the wall of the tray opens into an enclosure (20) whose upper end (21) is located at a higher level than the above-mentioned overflow. Appareil artisanal selon la revendication 1, caractérisé en ce que l'arête inférieure (18) de l'ouverture susdite (12) est déplaçable verticalement.Handcrafted apparatus according to claim 1, characterized in that the lower edge (18) of said opening (12) is vertically movable. Appareil artisanal selon la revendication 1 ou 2, caractérisé en ce que le bac (1), le dispositif d'alimentation (5), le trop-plein (6) et le siphon (10) forment un ensemble cohérent, monté sur pieds (34, 35, 36, 37) et en ce que l'enceinte (20) est aménagée à l'intérieur d'un desdits pieds.Hand-made appliance according to claim 1 or 2, characterized in that the container (1), the feed device (5), the overflow (6) and the siphon (10) form a coherent assembly mounted on feet ( 34, 35, 36, 37) and in that the enclosure (20) is arranged inside one of said feet. Appareil artisanal selon l'une quelconque des revendications 1 à 3, caractérisé en ce que le siphon (10) comprend une cloison (11) sensiblement verticale et en ce que le dispositif d'alimentation (5) comprend un chenal incliné dont la paroi de fond est raccordée à la cloison susdite du siphon.Hand-made appliance according to any one of claims 1 to 3, characterized in that the siphon (10) comprises a partition (11) substantially vertical and in that the feeding device (5) comprises an inclined channel whose wall of bottom is connected to the aforementioned partition of the siphon. Appareil artisanal selon la revendication 4, caractérisé en ce que le chenal (5) et la cloison (11) forment un ensemble cohérent amovible.Hand-made device according to claim 4, characterized in that the channel (5) and the partition (11) form a removable coherent assembly. Appareil artisanal selon l'une quelconque des revendications 1 à 5, caractérisé en ce que le dispositif de pulsation d'eau comprend, d'une part, une membrane souple et étanche (27), séparant le compartiment inférieur (4) du bac (1) en deux chambres contiguës (29, 30) et, d'autre part, un organe (38, 39, 40, 41) d'actionnement de la membrane, conçu pour soumettre une zone centrale de la membrane à un mouvement alternatif de va-et-vient.Traditional apparatus according to any one of claims 1 to 5, characterized in that the water pulsation device comprises, on the one hand, a flexible and sealed membrane (27), separating the lower compartment (4) from the container ( 1) into two contiguous chambers (29, 30) and, on the other hand, a diaphragm actuating member (38, 39, 40, 41) adapted to subject a central region of the membrane to reciprocating motion. back and forth. Appareil artisanal selon la revendication 6, caractérisé en ce que le bac est formé de deux caissons accolés (42, 43), entre lesquels la membrane est interposée. Artisanal apparatus according to claim 6, characterized in that the tray is formed of two contiguous boxes (42, 43), between which the membrane is interposed. Appareil artisanal selon la revendication 7 ou 8, caractérisé en ce que les deux chambres (29, 30) du compartiment inférieur (4) du bac sont prolongées respectivement par deux trémies (7) et en ce qu'une partie au moins de l'organe d'actionnement (38) de la membrane est localisé entre les deux trémies.Hand-made appliance according to claim 7 or 8, characterized in that the two chambers (29, 30) of the lower compartment (4) of the tank are extended respectively by two hoppers (7) and in that at least a part of the actuating member (38) of the membrane is located between the two hoppers. Appareil artisanal selon l'une quelconque des revendications 1 à 8, caractérisé en ce que la grille (2) constitue une partie au moins de la paroi de fond d'un bassin qui est disposé de manière amovible dans le bac.Crafts device according to any one of claims 1 to 8, characterized in that the grid (2) constitutes at least a portion of the bottom wall of a basin which is removably disposed in the tray. Appareil artisanal selon l'une quelconque des revendications 1 à 9, caractérisé en ce qu'il comprend plusieurs bacs (1) disposés en série l'un derrière l'autre, de telle sorte que le trop-plein (44) d'un bac d'amont constitue le dispositif d'alimentation (5) du bac qui est immédiatement situé en aval du bac d'amont.Crafts apparatus according to one of claims 1 to 9, characterized in that it comprises a plurality of trays (1) arranged in series one behind the other, so that the overflow (44) of a upstream tank constitutes the feed device (5) of the tank which is immediately located downstream of the upstream tank.
    EP04008046A 2004-04-02 2004-04-02 Device for separating minerals Withdrawn EP1582261A1 (en)

    Priority Applications (4)

    Application Number Priority Date Filing Date Title
    EP04008046A EP1582261A1 (en) 2004-04-02 2004-04-02 Device for separating minerals
    PCT/BE2005/000046 WO2005094999A1 (en) 2004-04-02 2005-04-04 Mechanical device for the concentration of minerals
    US11/547,523 US20080190823A1 (en) 2004-04-02 2005-04-04 Mechanical Device for the Concentration of Minerals
    ZA200608143A ZA200608143B (en) 2004-04-02 2006-09-29 Mechanical device for the concentration of minerals

    Applications Claiming Priority (1)

    Application Number Priority Date Filing Date Title
    EP04008046A EP1582261A1 (en) 2004-04-02 2004-04-02 Device for separating minerals

    Publications (1)

    Publication Number Publication Date
    EP1582261A1 true EP1582261A1 (en) 2005-10-05

    Family

    ID=34878249

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP04008046A Withdrawn EP1582261A1 (en) 2004-04-02 2004-04-02 Device for separating minerals

    Country Status (4)

    Country Link
    US (1) US20080190823A1 (en)
    EP (1) EP1582261A1 (en)
    WO (1) WO2005094999A1 (en)
    ZA (1) ZA200608143B (en)

    Cited By (1)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    CN112295723A (en) * 2020-09-09 2021-02-02 江西浒坑钨业有限公司 Fine particle grade tungsten recovery beneficiation system and beneficiation method thereof

    Families Citing this family (3)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    CN108816914A (en) * 2018-05-07 2018-11-16 河南省惠丰金刚石有限公司 A kind of diadust production is Special Automatic to wash sour machine
    CN108816500B (en) * 2018-08-20 2024-03-08 唐山陆凯科技有限公司 Ore separating box capable of uniformly separating materials
    WO2020198709A1 (en) * 2019-03-27 2020-10-01 Richard Snoby Jig concentrator

    Citations (4)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    GB785451A (en) * 1953-07-06 1957-10-30 Westfalia Dinnendahl Groeppel Improvements in and relating to the separation of coal, ores or other minerals into three or more fractions
    GB801287A (en) * 1956-08-04 1958-09-10 Ong Lee Teik Combined movable-sieve and fixed-sieve round jig for ore concentration
    DE1271051B (en) * 1966-03-26 1968-06-27 Rech S Geol Et Minieres Bureau Typesetting machine
    FR2469957A1 (en) * 1979-11-20 1981-05-29 Rech Geolog Miniere Separating sieve for granular products - has cylindrical container with pulsating sieve and bowl-shaped deflector

    Family Cites Families (5)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    US2156168A (en) * 1939-04-25 Method fob concentrating
    US1121715A (en) * 1914-09-08 1914-12-22 William Wesley Cooper Coal-washing machine.
    FR2085182A1 (en) * 1970-01-07 1971-12-24 Rech Geol Bureau
    US4783253A (en) * 1986-04-21 1988-11-08 Ayres James Walter Process for separating radioactive and hazardous metal contaminants from soils
    CA1311218C (en) * 1986-06-27 1992-12-08 University Of Queensland Control of jig separators

    Patent Citations (4)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    GB785451A (en) * 1953-07-06 1957-10-30 Westfalia Dinnendahl Groeppel Improvements in and relating to the separation of coal, ores or other minerals into three or more fractions
    GB801287A (en) * 1956-08-04 1958-09-10 Ong Lee Teik Combined movable-sieve and fixed-sieve round jig for ore concentration
    DE1271051B (en) * 1966-03-26 1968-06-27 Rech S Geol Et Minieres Bureau Typesetting machine
    FR2469957A1 (en) * 1979-11-20 1981-05-29 Rech Geolog Miniere Separating sieve for granular products - has cylindrical container with pulsating sieve and bowl-shaped deflector

    Cited By (1)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    CN112295723A (en) * 2020-09-09 2021-02-02 江西浒坑钨业有限公司 Fine particle grade tungsten recovery beneficiation system and beneficiation method thereof

    Also Published As

    Publication number Publication date
    US20080190823A1 (en) 2008-08-14
    WO2005094999A1 (en) 2005-10-13
    ZA200608143B (en) 2007-06-27

    Similar Documents

    Publication Publication Date Title
    CA2608239A1 (en) Process and device for separating plastics of different chemical composition by flotation
    CA2703278C (en) Roasting and grinding device and method in fluidised bed of a biomass load for ulterior gasification or combustion
    US10987699B2 (en) Density separator for waste material
    FR2561141A1 (en) VIBRATION SEPARATION APPARATUS
    EP1582261A1 (en) Device for separating minerals
    RU2429074C2 (en) Device for gravitational recovery of mineral deposits (dycon model) (versions)
    FR3068689A1 (en) SYSTEM FOR DEPOLLUATING AQUATIC ENVIRONMENTS
    EP2364782B1 (en) Process and device for the treatment of the heavy products derived from waste sorting
    CN112888506B (en) Separation device and method
    FR2515065A1 (en) PROCESS FOR THE DYNAMIC SEPARATION BY A DENSE MEDIUM OF MIXTURES OF MATERIALS, SUCH AS FOR EXAMPLES OF ORES, OF DIFFERENT SPECIFIC WEIGHTS, AND INSTALLATION FOR ITS IMPLEMENTATION
    RU2098188C1 (en) Method and device for separation of mixture
    RU2345839C1 (en) Gravity concentrator
    CN200988029Y (en) Multilayer sand separating machine
    EP0760713B1 (en) Device and process for separating and qualifying particles forming a granular product
    EP3360407B1 (en) Screen for grain cleaner
    FR2663246A1 (en) METHOD AND INSTALLATION OF FRACTIONATION AND MILLING OF BROKEN MATERIALS
    RU2448777C2 (en) Method and device for extraction of fine gold
    US650999A (en) Machine for separating shells from kernels of nuts.
    CA2268504A1 (en) Mobile mine plant
    CA2505011A1 (en) Apparatus and method for wastewater treatment by means of electroflotation and/or electrocoagulation
    SU784913A1 (en) Method and apparatus for separating grain materials by size and density
    FR2881664A1 (en) Refuse incineration residues e.g. clinkers, separating method for refuse incineration plant, involves evacuating floating materials by salt water flowing via orifice, and removing denser materials by scraper and passing on conveyor belts
    BE567798A (en)
    FR3048690A1 (en) DISSOLVED AIR FLOTTER WITH INPUTS AND MULTIPLE OUTPUTS
    BE365030A (en)

    Legal Events

    Date Code Title Description
    PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

    Free format text: ORIGINAL CODE: 0009012

    AK Designated contracting states

    Kind code of ref document: A1

    Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR

    AX Request for extension of the european patent

    Extension state: AL HR LT LV MK

    AKX Designation fees paid
    REG Reference to a national code

    Ref country code: DE

    Ref legal event code: 8566

    STAA Information on the status of an ep patent application or granted ep patent

    Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

    18D Application deemed to be withdrawn

    Effective date: 20060406