RU2605859C2 - Gate with chute variable profile ("herringbone" gate) - Google Patents

Abstract

FIELD: mining.

SUBSTANCE: invention relates to minerals dressing, in particular to minerals processing equipment, and can be used for dressing of ores and sands containing fine gold, at concentrating mills, dredges and trammels. Gate with variable chute profile, "Herringbone" gate includes loading unit, trapezoidal chute with sides and flat bottom, consisting of two planes located one above another, one of bottom planes is rigidly fixed with chute sides, and unloading device with unloading holes throughout bottom width. Gate is equipped with at least one additional chute, each of which is made expanding in direction of pulp travel and by its end part is connected with following chute through additional insert, which is continuation of bottom lower plane from wide to narrow part. Under insert receiving-unloading devices are located. Bottoms lower planes are rigidly connected with gate boards and arranged with gap relative to bottoms upper planes, which made according bottoms lower surfaces form in form of grid consisting of two parts, hinged at chute ends, provided with guide plates installed on grids surface. Gap value exceeds width of transverse slotted holes of upper planes - chutes bottom grids. Receiving-unloading devices are equipped with locking assemblies.

EFFECT: improved valuable heavy particles segregation conditions due to pulp flow hydrodynamic mode periodic changes, flowing along gate.

1 cl, 5 dwg

Description

The invention relates to the field of mineral processing, in particular to processing equipment, and can be used for the processing of ores and sands containing fine gold in processing plants, dredges and flushing devices.

A gateway is known, which is a rectangular trough with parallel sides, on the bottom of which rubber mats and stencils are laid, designed to trap (hold) settled heavy minerals. Heavy minerals settle between the stencils on the mat and are periodically removed (the process of shooting or rinsing the concentrate); at this time, the work of the lock stops (Equipment and technology for the enrichment of the sand of placer gold deposits / Reference manual. V.K. Preys, Magadan, “Cordis”, 2002 - 295 pp.).

The disadvantages of this gateway are the low extraction of small valuable particles of precious metals due to the high turbulence of the pulp flows and the sewing (silting) of the trapping surface of the gateway stencils (rugs), the use of manual labor for rinsing (shooting) of the gateway concentrate and the need to stop the gateway during this operation, the use of trapping coatings (rugs), the inability to adjust the output of the concentrate.

Known gateway for mineral processing, including a chute, mounted with the possibility of oscillations relative to its longitudinal axis, and stencils.

The gutter is made in cross section with variable curvature and is equipped with flaps rigidly fixed on its sides, and forming an inverted container with them. In this case, the trough in cross section is made in the form of a semi-ellipse in the loading part, smoothly turning into a semicircle in the unloading part (Patent No. 2147466 of January 15, 1998, B03B 5/70).

The disadvantages of this gateway are: a low degree of concentration of valuable components in a marketable product (concentrate) due to the large yield of the concentrate and the inability to control its output, a low level of extraction of fine precious particles of precious metals (finer than 0.25-0.1 mm) due to the turbulence of the flows associated with the vibration of the gutter, and the complexity of the design of the apparatus, requiring the use of special devices and electric motors to give oscillatory movements to the gutter.

Closest to the proposed technical solution is an enrichment trench, tapering in the direction of movement of the hydraulic mixture and having discharge openings over the entire width of the flat bottom. The bottom is made of two planes located one above the other, the upper plane is rigidly connected to the sides of the dressing channel, and the lower plane is mounted with the ability to move and fix in a predetermined position using spacers in the grooves of the brackets (Patent No. 2166995 of 12/21/1999, B03B 5 / 70).

The disadvantages of this apparatus are: a low degree of concentration of particles of precious metals and a low level of their extraction into a marketable product, because narrowing the trench in the direction of movement of the slurry leads to an increase in the speed of the pulp flow, an increase in its turbulence, which does not allow small valuable heavy particles to reach the bottom of the perforated upper bottom and through the discharge openings that may be clogged, go into the marketable product (concentrate), the need to limit adjustment and constant control of the maximum linear discharge opening in connection with the possibility of their pressing (clogging) by rock particles, which cannot be done without stopping the operation of the apparatus, the complexity of the design.

The objective of the invention is to increase the efficiency of enrichment of a material containing valuable heavy minerals (precious metals) and increase the extraction of fine particles into the concentrate, providing the ability to adjust the yield and quality of the concentrate (commercial products) and simplifying the design of the apparatus.

The technical result is an improvement in the segregation of valuable heavy particles due to periodic changes in the hydrodynamic regime of the pulp stream, flowing through a lock having a different profile of the gutter that varies along the direction of the pulp movement, the width of which increases in the direction of the pulp movement to the concentrate discharge device, which increases the material enrichment efficiency containing precious metals.

The task is achieved by the fact that in the gateway with a changing profile of the gutter (gateway "Herringbone"), including the boot node, a trapezoidal gutter with sides and a flat bottom, consisting of two planes located one above the other, one of the planes of the bottom is rigidly fixed with the sides of the gutter and an unloading device with unloading openings to the width of the bottom, according to the invention, the lock contains at least two gutters, each of which is made expanding along the pulp and connected with its end part to the next gutter through an additional insert, which is a continuation of the bottom plane of the bottom from wide to narrow, receiving and unloading devices are located under the insert, the lower planes of the bottoms being rigidly connected to the sides of the airlock and installed with a gap relative to the upper planes of the bottoms, which are made in the shape of the lower planes of the bottoms in in the form of a lattice consisting of two parts pivotally mounted at the ends of the gutter, equipped with guide plates mounted on the surface of the gratings, while the gap is larger than the width s of the transverse planes of the upper slot-like openings - gutter bottom grids. The receiving and unloading devices are equipped with locking nodes.

The presence of a gap between the planes of the troughs allows the heavy fraction of the enriched material containing particles of precious metals to penetrate there and move to the receiving and unloading devices that are installed at the end of the wide part of each trough and are made over the entire width of their lower planes.

The upper plane is made in the form of a lattice installed at a certain distance from the lower plane of the bottom and consisting of two parts, each of which is pivotally mounted on opposite ends of the airlock, which allows you to lift these parts of the lattice in opposite directions and control the space of the interplanar gap, and on the surface guide plates are installed on the upper plane of each trapezoidal groove along the course of the pulp flow, which allows to maintain the conveying ability of the pulp flow When it expands which prevents zaefelivanie gateway and provides its operation in optimum conditions.

Each receiving and unloading device has a locking unit, which allows you to adjust the output of the gateway concentrate for processing and change the amount of the obtained gateway concentrate.

The specified design of the gateway provides periodic changes in the speed, depth and turbulence of the flow of pulp containing precious metals, with a decrease in their size during the passage of pulp from tapering to expanding parts of each gutter with the output of sublattice material (concentrate) containing precious metals from each volume of enriched material supplied to the next trough, which contributes to the intensification of the process of sand enrichment with an increase in the phenomena of segregation of particles of various densities and sizes, and more complete the extraction of precious metals particles, especially its fine fractions, into a marketable product (concentrate). The presence of an interplanar gap provides continuous movement along the lower continuous plane of the lock of valuable heavy particles of precious metals falling into the indicated space from the pulp stream flowing along the upper perforated plane (lattice) of the lock with their subsequent concentration (accumulation) in the receiving and unloading device and the discharge of concentrate from it for processing through a hole adjustable with a locking device.

Distinctive features are unknown and obviously do not follow from the prior art.

In FIG. 1 is a side view of the Fir-tree gateway;

In FIG. 2 is a section along B-B of FIG. 3;

In FIG. 3 - top view of the Fir-tree gateway;

In FIG. 4 is a view according to A of FIG. 3;

In FIG. 5 is a general view of the Fir-tree gateway.

The gateway consists of a boot device 1 adjacent to a narrow part of the trapezoidal grooves 2 connected in series, the bottom of which consists of the lower 3 and upper 4 planes. The lower plane 3 is rigidly connected with the sides 5 of the trapezoidal grooves 2 and is continuous, at the junction of the grooves 2 (from the wide to the narrow part) there is an additional insert 6, under which there are receiving and unloading devices 7 with a locking assembly 8. The upper plane 4 is installed with a gap 9 relative to the lower plane 3 of the bottom. The upper plane 4 is made in the form of a lattice (stencil), consisting of two parts, pivotally mounted on the opposite ends of each groove 2, and on the surface of the upper plane 4 of each trapezoidal groove 2 along the flow of the pulp guide plates 10 are installed, dividing the current pulp along the upper plane in at least three parts, which helps to stabilize the flow of pulp during its movement (flow) to the expanding part of the trapezoidal groove 2 and the preservation of its transporting ability, prevents contamination for and facilitate its work in optimal conditions. In order to adjust the output of the concentrate from the receiving and unloading device 7, shut-off units 8 are installed, and technological water is supplied to the device 7 from the opposite side of the installed shut-off unit 8 (from the end) for flushing the concentrate from the receiving and unloading device 7 through the pipe 11. The size of the gap 9 is greater than the width of the transverse slit-like openings of the upper planes - gratings 4 of the bottom of the gutters 2.

The gateway "Fir-tree" works as follows. The pulp (power) is fed into the loading device 1, from which it enters the narrowest part of the first trapezoidal groove 2 with the subsequent transition to the upper expanding plane 4 of the groove 2, moving to its wide part, as a result of which the flow velocity, depth and turbulence are reduced, which contributes to more efficient (full) deposition of small particles of precious metals from the pulp stream into the interplanar gap 9 and onto the lower continuous plane 3 of the groove 2. The guide rails installed on the upper plane along the pulp flow 10 allow mud to create on the surface of the upper conveying surfaces 4 streams capable of moving the solid material along the top plane 4 of the trough 2, which prevents its zaefelivanie solid phase slurry. Particles of precious metals and other heavy minerals deposited from the pulp, having fallen to the bottom of the lower plane 3 of the trapezoid groove 2, move along it in the direction of the pulp and enter the receiving and unloading device 7, from which, using shut-off units 8 and flush water coming from the nozzles 11 are displayed outside for further processing. The remaining part of the material (pulp) emerging from the wide part of the first trapezoidal trench 2 and having lost part of the solid and liquid again falls into the narrow part of the next trapezoidal trench 2, which contributes to a short-term increase in the pulp flow rate, increase turbulence and accelerate particle segregation processes at the moment time, followed by a gradual decrease in flow velocity as the pulp moves along the upper plane of the groove 4 expanding along the pulp and the turbulence decreases That leads to a repetition of the deposition process of the precious metals on the bottom of the lower plane 3 of trapezoidal troughs 2 described above.

Thus, due to the periodic change in the hydrodynamics of the pulp stream flowing through the Fir-tree sluice (speed, depth, flow turbulence), favorable, optimal conditions are created for the extraction of precious metal particles of various morphology and size, including their lamellar, hard-to-extract forms and fine-grained fractions (finer 0.25-0.1 mm), and the gateway design itself creates and preserves the specified optimal conditions throughout the entire enrichment process without the use of additional materials and devices (vibration, mats et al.).

Claims (2)

1. Gateway with a changing profile of the gutter (gateway "Herringbone"), including a loading unit, a trapezoidal gutter with sides and a flat bottom, consisting of two planes located one above the other, one of the planes of the bottom is rigidly fixed with the sides of the gutter, and the unloading device with discharge openings to the width of the bottom, characterized in that the gateway contains at least two gutters, each of which is made expanding along the pulp and connected with its end part to the next gutter through an additional insert, which is a continuation of the lower plane of the bottom from wide to narrow, receiving and unloading devices are located under the insert, the lower planes of the bottoms being rigidly connected to the sides of the airlock and installed with a gap relative to the upper planes of the bottoms, which are made in the form of the lower planes of the bottoms in the form of a lattice consisting of of two parts, pivotally mounted at the ends of the gutter, equipped with guide plates mounted on the surface of the gratings, while the gap is greater than the width of the transverse slit-like openings of the upper x planes - gratings of the bottom of the gutters. 2. The gateway under item 1, characterized in that the receiving and unloading devices are equipped with locking nodes.

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