CN119549275A - A method for recovering black tungsten from muddy tungsten polymetallic ore - Google Patents
A method for recovering black tungsten from muddy tungsten polymetallic ore Download PDFInfo
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- CN119549275A CN119549275A CN202411880059.4A CN202411880059A CN119549275A CN 119549275 A CN119549275 A CN 119549275A CN 202411880059 A CN202411880059 A CN 202411880059A CN 119549275 A CN119549275 A CN 119549275A
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- 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
- B03B7/00—Combinations of wet processes or apparatus with other processes or apparatus, e.g. for dressing ores or garbage
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- 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
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
- B03C1/02—Magnetic separation acting directly on the substance being separated
- B03C1/10—Magnetic separation acting directly on the substance being separated with cylindrical material carriers
- B03C1/12—Magnetic separation acting directly on the substance being separated with cylindrical material carriers with magnets moving during operation; with movable pole pieces
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/52—Mechanical processing of waste for the recovery of materials, e.g. crushing, shredding, separation or disassembly
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Abstract
The invention belongs to the technical field of black tungsten ore dressing, and particularly relates to a method for recovering black tungsten from a tungsten-sliming multi-metal ore dressing. The method is characterized in that the demagnetizing iron ore and the tailings are finished through one-step rough concentration, the grade of magnetite is high, the tailings contain black tungsten and magnetite are basically negligible, the black tungsten ore is centrifugally selected through a centrifugal concentrating machine after being matched with concentration, the grade of the black tungsten ore is high, the recovery rate is considerable, and the concentration tank is pertinently improved, in order to accelerate the concentration process, the concentration efficiency is improved to realize rapid concentration, a downward directional conveying carrying belt is arranged in the concentration tank and used for accelerating sedimentation and reducing viscous effect, so that the concentration effect is greatly enhanced.
Description
Technical Field
The invention belongs to the technical field of black tungsten ore dressing, and particularly relates to a method for recovering black tungsten from a tungsten-sliming multi-metal ore dressing.
Background
The chemical component of the wolframite is (Fe, mn) WO4, and is an oxide mineral in monoclinic system. Its mineral and streak colour change with iron and manganese content, generally brown-to-black, streak yellow-to-black, with metallic to semi-metallic luster and a complete set of plate surface cleavage. Further, wolframite has a specific gravity of 7.2 to 7.5, a mohs hardness of 4 to 4.5, and generally has such weak magnetism.
The existing polymetallic mud ore can remove magnetite and nonmagnetic tailings through repeated magnetic separation when recycling and dressing, so that the production line is long, the process is complex, the phenomenon of unrepeace often occurs, namely the production cost is higher than the selling price of the ore, and therefore, a process method for finishing the grade assurance and high-efficiency recycling of wolfram nigricant ore through a simple magnetic separation process is required to be developed.
Disclosure of Invention
The technical problems to be solved by the invention are as follows:
how to efficiently recycle scheelite from multi-metal mud ore.
In order to solve the technical problems, the inventor obtains the technical proposal of the invention through practice and summary, the degaussing iron ore and the tailing throwing are finished through one-time rough concentration, the grade of magnetite is high, the tailings contain black tungsten and magnetite are basically negligible, the black tungsten ore is centrifugally selected through a centrifugal concentrator after being matched with concentration, the black tungsten ore has high grade and considerable recovery rate, and the technical proposal is as follows:
A method for concentrating and recovering black tungsten from a tungsten-slimed multi-metal ore comprises the following steps:
Step 1, grinding
Grinding raw ore to obtain mud ore with granularity of 80% -95% of the weight of-74 μm, and blending the mud ore into 30% ore pulp;
step 2, magnetic separation of magnetite
Carrying out weak magnetic roughing on the ore pulp, wherein the magnetic field strength of the weak magnetic roughing is 4000 gauss, so as to obtain magnetic roughing concentrate and magnetic roughing tailings and magnetic roughing middlings;
Step 3, magnetically separating wolframite
Carrying out strong magnetic separation on the magnetic roughing middlings by 1.0-1.3 Tesla to obtain weak magnetic separation minerals and demagnetized tailings;
The weak magnetic separation minerals are subjected to shaking table gravity separation to obtain black tungsten concentrate I and gravity tailings, the gravity tailings are subjected to one-coarse two-fine centrifugal gravity separation to obtain black tungsten concentrate I I and black tungsten centrifugal tailings, and the black tungsten concentrate I and black tungsten concentrate I I are used as target black tungsten concentrates;
During production, concentration is required before centrifugation, so that the recovery rate of wolframite and the grade of minerals can be guaranteed, the traditional concentration is usually realized by only using a sedimentation effect, sedimentation cannot be realized rapidly due to small granularity of the mud ore, so that the sedimentation efficiency is not ideal, in the step 3, the gravity tailings enter a centrifugal concentrator after being concentrated, and a secondary concentration device is adopted for concentration, wherein the secondary concentration device comprises two concentration tanks which are arranged in series;
the concentrating tank comprises a feeding hole, a concentrating hole and an overflow hole, wherein a conical structure is arranged at the bottom of the concentrating tank, openings are formed in two sides of the conical structure, polyurethane sealing strips are arranged around the openings, a driver and a driven roller are arranged at the side part of the concentrating tank, an active driving roller is arranged at the output end of the driver, a receiving belt is wound on the active driving roller and the driven roller, a butt joint piece is arranged in an area between the active driving roller and the driven roller, a plurality of butt joint rollers are arranged on the butt joint piece, and the butt joint rollers are used for extruding the receiving belt outside the openings.
The low-intensity magnetic separation minerals enter the buffer tank before entering the concentration tank, and the ore pulp or water flow from the upstream process is received and stored, so that the flow rate is regulated. When the flow rate of the ore pulp in the upstream process is too large or unstable, the buffer pool can absorb the redundant flow rates and smoothly release the flow rate to the downstream process when needed, so that the stable operation of the whole ore dressing system is ensured. Install mounting panel and fixed plate in the buffer tank, rotate on the mounting panel and install the connecting ball, connecting rod one is installed at the top of connecting ball, the stirring head is installed to the bottom, the slave gear is installed at connecting rod one top, it has a plurality of puddlers to articulate on the stirring head, the side top at the buffer tank is installed to the fixed plate, install driving motor on the fixed plate, the master gear is installed to the driving motor output, master gear and slave gear meshing, and autorotation is carried out when doing circumferential motion around the periphery of master gear from the gear.
Preferably, the weak magnetic roughing adopts a magnetic separator, the magnetic separator comprises a magnetic separation box, a mineral feeding groove and a mineral discharging groove, an arc-shaped magnetic separation groove is arranged in the magnetic separation box, a magnetic separation roller is arranged on the magnetic separation box, a transmission shaft is arranged at one end of the magnetic separation roller, a first bearing seat is arranged at the outer side of the magnetic separation roller in a matched manner, a first roller bearing seat is arranged at the other end of the magnetic separation roller, a roller bearing seat is abutted to the lower part of the outer side of the shaft collar, both the first bearing seat and the roller bearing seat are arranged on the magnetic separation box, a permanent magnet magnetic group is horizontally and eccentrically arranged in the magnetic separation roller, a maximum field intensity position and a minimum field intensity position are formed on the magnetic separation roller, one end of the permanent magnet group is rotatably arranged at the inner side of one end of the magnetic separation roller, the other end of the permanent magnet group extends to the outer side of the shaft collar and is provided with a second bearing seat, the second bearing seat is arranged on the magnetic separation box, two speed reducing motors are respectively arranged on the magnetic separation box, and are respectively positioned at two sides of the magnetic separation box, and the two speed reducing motors are respectively used for driving the magnetic separation roller and the permanent magnet group;
the ore feeding groove is arranged above the side part of the maximum field intensity position, and the ore discharging groove is arranged below the side part of the minimum field intensity position;
a magnetic separation channel is enclosed between the arc magnetic separation groove and the magnetic separation roller;
The arc magnetic separation tank is provided with two ore discharging ports which are symmetrically distributed at two sides of the arc magnetic separation tank, and the two ore discharging ports are respectively a tailing port and a middling port.
Preferably, an adjustable switch board is arranged at the ore discharging opening.
Preferably, the eccentric disc is provided with a magnetic isolation plate, the bottom of the magnetic isolation plate covers the maximum field intensity position and is higher than the top of the ore unloading groove, a top stay bar is arranged between the magnetic isolation plate and the permanent magnetic group, and one end of the magnetic isolation plate, which is far away from the eccentric disc, extends to the outer side of the magnetic separation roller through the connecting plate and is fixed on the magnetic separation box.
Preferably, lifting plates are arranged on two sides of the magnetic separation box and used for mounting a first bearing seat, a second bearing seat and a speed reducing motor;
A guide rod is fixedly arranged at the bottom of the lifting plate and vertically matched with the magnetic separation box in a sliding manner;
an upper adjusting block is arranged at the bottom of the lifting plate, a lower adjusting block is correspondingly arranged below the upper adjusting block, the lower adjusting block is horizontally arranged on the magnetic separation box, two sides of the lower adjusting block are respectively and independently provided with a horizontal guide rail, the horizontal guide rail is fixedly arranged on the magnetic separation box, one side of the lower adjusting block is provided with a fine crest shaft which is in threaded connection with the magnetic separation box, and the fine crest shaft is used for horizontally pushing and pulling the lower adjusting block.
Preferably, a groove is formed in the bottom surface of the lower adjusting block, a retaining plate is arranged in the area between the two horizontal guide rails, the retaining plate corresponds to the groove in position, a vertical groove is formed in the lower adjusting block, a sliding block is slidably matched in the vertical groove, a spring piece is mounted at the bottom of the sliding block, a sliding groove is formed in the sliding block, the bottom of the sliding groove is obliquely downwards arranged and gradually approaches to the fine tooth top shaft, and a connecting pin is slidably matched in the sliding groove;
One side of the lower regulating block, which is opposite to the thin crest shaft, is provided with a through groove, the thin crest shaft is fixedly connected with the connecting pin through the through groove, and the bottom of the sliding block is provided with an elastic locking block.
Preferably, the vertical groove is a stepped hole with a large upper part and a small lower part, and is divided into an upper installation area and a lower guide area.
Preferably, the elastic locking block comprises a mounting groove arranged at the bottom of the sliding block, a spring body and a T-shaped block are arranged in the mounting groove, the top of the T-shaped block is in sliding fit with the inner side of the mounting groove and the top surface of the T-shaped block is in butt joint with the bottom end of the spring body, a limiting block is arranged at the bottom of the mounting groove and sleeved on the outer side of the T-shaped block, an anti-back plate is arranged at the bottom of the T-shaped block, and one side, opposite to the anti-back plate, of the anti-back plate is provided with one-way ratchets.
Preferably, ore pulp is fed from a feeding tank to a magnetic separation roller to enter an arc-shaped magnetic separation tank, a horizontally biased permanent magnet magnetic group is arranged in the magnetic separation roller, a maximum field intensity position and a minimum field intensity position are formed on the magnetic separation roller, and the ore feeding position is positioned above one side of the magnetic separation roller at the maximum field intensity position;
The magnetic materials in the ore pulp are adsorbed on the magnetic separation roller, and the ore pulp is secondarily fed on the magnetic separation roller through the feeding arc plate;
The ore pulp rotates around the respective axes in the magnetic separation roller and the internal permanent magnet group, the permanent magnet group is a plurality of N poles and S poles which are alternately distributed, and the magnetic materials roll over the surface of the magnetic separation roller and are conveyed to the ore discharge groove;
the magnetic roughing tailings are discharged through a tailing port after being washed by water flow in the arc-shaped magnetic separation tank, and the magnetic roughing concentrate continuously passes through the bottom area of the arc-shaped magnetic separation tank and is discharged through a middling port after being washed by water flow;
the magnetic materials still adsorbed on the magnetic separation roller are discharged by an ore discharging groove, wherein the ore discharging groove is positioned below one side of the magnetic separation roller at the position of the minimum field intensity;
When the thin crest shaft horizontally moves the lower regulating block close to the upper regulating block, the lower regulating block moves upwards along the sliding groove through the connecting pin, and the sliding block moves downwards to compress the spring piece, so that the elastic locking block is adapted to the retaining plate, and the lower regulating block is prevented from moving backwards;
When the fine tooth top shaft horizontally moves the lower adjusting block away from the upper adjusting block, the lower adjusting block moves down along the sliding groove through the connecting pin, the sliding block moves up, and the spring piece resets, so that the elastic locking block and the retaining plate are in an unfit state.
Compared with the prior art, the invention has the following beneficial effects:
1. The invention adopts single magnetic separation to separate magnetite concentrates, forms a maximum field intensity position and a minimum field intensity position on a magnetic separation roller through a permanent magnet group horizontally and eccentrically arranged in the magnetic separation roller, adsorbs ore pulp given by an ore feeding groove at the first time by utilizing the maximum field intensity position, and makes rotary motion by taking the axis of the inner permanent magnet group as the center, wherein the surfaces of the permanent magnet group are N poles and S poles which are distributed at intervals, so that adsorbed minerals roll continuously on the magnetic separation roller towards an ore unloading groove, agglomeration is repeatedly opened, non-magnetic minerals in the agglomeration are separated out, the non-magnetic minerals are washed by water flow in the magnetic separation roller and the arc-shaped magnetic separation groove, discharged into a strong magnetic separator (1.0-1.3 tesla magnetic field intensity) through a tailing port, the adsorbed magnetic minerals and the rest non-magnetic minerals move to a middling port through the bottom of the arc-shaped magnetic separation groove, and the rest non-magnetic minerals also undergo primary washing in the process, the magnetic minerals continue to move to the ore unloading groove continuously due to the fact that the magnetic field becomes small in the process, and the non-magnetic minerals are unloaded to the ore unloading groove continuously, the non-magnetic minerals are unloaded to the ore 1.0 tesla magnetic separation device, and the ore is finished, and the ore is subjected to the single magnetic separation is reduced to the production and the ore concentration has the strong magnetic separation process has the magnetic separation strength of 1.0 tesla, and the strong magnetic separation has the magnetic separation strength, and has the high ore strength, and the ore concentration has the high magnetic concentration strength and 1.
2. The invention carries out rough concentration of black tungsten by a strong magnetic separator on weak magnetic field and extremely weak magnetic field, and the rough concentration of the black tungsten ore concentrate is obtained by repeated centrifugation operation, thus the grade and recovery rate of the black tungsten concentrate are improved.
3. The concentration tank is improved in pertinence, in order to accelerate the concentration process, the concentration efficiency is improved to realize rapid concentration, the viscosity of ore pulp is gradually increased according to the concentration rise, the ore pulp is extremely easy to stick on the inner wall of the bottom, cleaning operation is needed after concentration each time, continuous concentration operation treatment cannot be completed, and a bearing belt which is conveyed downwards in a directional manner is added in the concentration tank and is used for accelerating mineral concentration, and the phenomenon that minerals stick on the inner wall of the bottom can be avoided.
4. According to the invention, the stirring structure is arranged in the buffer tank, the uniformity of ore pulp is maintained by using the stirring structure, and the phenomenon that precipitation occurs at the position and the recovery rate of black tungsten is influenced is avoided.
Drawings
FIG. 1 is a schematic diagram of a process for recovering black tungsten according to the present invention;
FIG. 2 is an internal structural view of the magnetic separator of the present invention;
FIG. 3 is a transverse cross-sectional view of the magnetic separator of the present invention;
FIG. 4 is an enlarged view of a portion of FIG. 3 at A;
FIG. 5 is a schematic view of the elastic locking block in FIG. 4;
FIG. 6 is a side view of the magnetic separation drum of the present invention on the side remote from the corresponding drive;
FIG. 7 is a schematic view of the structure of the buffer tank of the present invention;
FIG. 8 is a schematic view showing the internal structure of the concentrating tank according to the present invention;
Fig. 9 is a side view of the concentrating tank of fig. 8.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
In the description of the present invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Embodiment 1 as shown in fig. 1, a method for concentrating and recovering black tungsten from a multi-metal ore of tungsten mud comprises the following steps:
Step 1, grinding
Grinding raw ore to obtain mud ore with granularity of 80% -95% of the weight of-74 μm, and blending the mud ore into 30% ore pulp;
step 2, magnetic separation of magnetite
Carrying out weak magnetic roughing on the ore pulp, wherein the magnetic field strength of the weak magnetic roughing is 4000 gauss, so as to obtain magnetic roughing concentrate and magnetic roughing tailings and magnetic roughing middlings;
Step 3, magnetically separating wolframite
Carrying out strong magnetic separation on the coarse magnetic separation middlings by 1.0-1.3 Tesla, wherein the strong magnetic separation adopts a strong magnetic separator 200 to obtain weak magnetic separation minerals and demagnetized tailings;
The weak magnetic separation minerals are subjected to shaking table gravity separation to obtain black tungsten concentrate I and gravity tailings, the gravity tailings are subjected to one-coarse two-fine centrifugal gravity separation to obtain black tungsten concentrate I I and black tungsten centrifugal tailings, and the black tungsten concentrate I and black tungsten concentrate I I are used as target black tungsten concentrates;
In step 3, the gravity tailings are concentrated and then enter the centrifugal concentrator 500, wherein the concentration adopts a secondary concentration device 400, and the secondary concentration device 400 comprises two concentration tanks 401 which are arranged in series;
The concentrating tank 401 comprises a feed inlet 4011, a concentrating port 4012 and an overflow port 4013, a conical structure is arranged at the bottom of the concentrating tank 401, a notch 4014 is arranged at two sides of the conical structure, polyurethane sealing strips 4015 are installed around the notch 4014, the polyurethane sealing strips 4015 at the bottom also play a role of scraping mineral particles on a receiving belt 4019, a driver 4016 and a driven roller 4017 are installed at the side part of the concentrating tank 401, an active driving roller 4018 is installed at the output end of the driver 4016, receiving belts 4019 are wound on the active driving roller 4018 and the driven roller 4017, an abutting piece 4020 is installed in an area between the active driving roller 4018 and the driven roller 4017, a plurality of abutting rollers 4021 are arranged on the abutting piece 4020, the abutting rollers 4021 are used for extruding the receiving belts 4019 on the outer sides of the notch 4014 and can relatively move downwards, the downward movement speed is 3-10mm/min, sedimentation of the particles cannot be affected when the receiving belt 4019 is conveyed downwards, and the inner channeling cannot be caused. Wherein concentration mouth 4012 department installs ooff valve and concentration sensor, and the ooff valve of concentration sensor and concentration mouth department links to each other with the PLC controller, and concentration signal transmission that concentration sensor gathered is to the PLC controller, and the PLC controller judges to establish whether to accord with the settlement threshold value, if accord with, controls the ooff valve and opens the concentration mouth, accomplishes concentrated discharge.
The low-intensity magnetic separation minerals enter the buffer tank 300 before entering the concentration tank 401, a mounting plate 301 and a fixing plate 302 are mounted in the buffer tank 300, a connecting ball 3011 is rotatably mounted on the mounting plate 301, a connecting rod 3012 is mounted at the top of the connecting ball 3011, a stirring head 3013 is mounted at the bottom of the connecting ball 3013, a slave gear 3014 is mounted at the top of the connecting rod 3012, a plurality of stirring rods 3014 are hinged to the stirring head 3013, the fixing plate 302 is mounted at the side top of the buffer tank 300, a driving motor 3021 is mounted on the fixing plate 302, a main gear 3022 is mounted at the output end of the driving motor 3021, the main gear 3022 is meshed with the slave gear 3014, and the slave gear 3014 rotates while doing circumferential motion around the periphery of the main gear 3022. The main gear 3022 is driven to rotate by the driving motor 3021, the slave gear 3014 rotates while doing circumferential motion around the periphery of the main gear 3022, the bottom is stirred by the stirring head 3013 at the bottom, and meanwhile, the stirring rod 3014 on the stirring head is used for stirring four dead corners of the buffer tank 300, so that precipitation is prevented.
Yield, grade and recovery index for each process operated by this example:
In the embodiment 2, the weak magnetic roughing adopts the magnetic separator, the magnetic separator comprises a magnetic separation box 101, a feeding tank 102 and a mineral unloading tank 103, an arc-shaped magnetic separation tank 113 is arranged in the magnetic separation box 101, a magnetic separation roller 104 is installed on the magnetic separation box 101, a transmission shaft 105 is installed at one end of the magnetic separation roller 104, a first bearing seat 106 is installed on the outer side in a matched manner, the other end of the magnetic separation roller is a collar 107, a roller support seat 108 is abutted to the lower part of the outer side of the collar 107, the first bearing seat 106 and the roller support seat 108 are installed on the magnetic separation box 101, a permanent magnet group 109 is horizontally and eccentrically arranged in the magnetic separation roller 104, a maximum field intensity position and a minimum field intensity position are formed on the magnetic separation roller 104, one end of the permanent magnet group 109 is rotatably installed on the inner side of one end of the magnetic separation roller 104, the other end of the permanent magnet group 109 extends to the outer side of the collar 107 and is provided with a second bearing seat 111, the second bearing seat 111 is installed on the magnetic separation box 101, two speed reducing motors 112 are installed on the magnetic separation box 101, the two speed reducing motors 112 are respectively located on two sides of the magnetic separation box 101, and the two speed reducing motors 112 are respectively used for driving the magnetic separation roller 104 and the permanent magnet group 109;
The ore feeding tank 102 is arranged above the side part of the maximum field intensity position, and the ore discharging tank 103 is arranged below the side part of the minimum field intensity position;
a magnetic separation channel is surrounded between the arc magnetic separation groove 113 and the magnetic separation roller 104;
The arc magnetic separation tank 113 is provided with two ore discharging openings 114, the ore discharging openings 114 are symmetrically distributed on two sides of the arc magnetic separation tank 113, and the two ore discharging openings 114 are respectively a tailing opening and a middling opening.
An adjustable switch plate 115 is installed at the ore discharging port 114, and the size of the opening can be adaptively selected according to the specific implementation situation through the adjustable switch plate 115, so that the required grade and recovery rate are obtained.
The eccentric disc 110 is provided with a magnetic isolation plate 1101, the bottom of the magnetic isolation plate 1101 covers the maximum field intensity position and is higher than the top of the ore unloading groove 103, a top stay bar 1102 is arranged between the magnetic isolation plate 1101 and the permanent magnet magnetic group 109, one end of the top stay bar 1102 is fixed on the magnetic isolation plate 1101, the other end of the top stay bar 1102 is arranged on the permanent magnet magnetic group 109 in a rolling mode, and one end of the magnetic isolation plate 1101, far away from the eccentric disc 110, extends to the outer side of the magnetic separation roller 104 through a connecting plate and is fixed on the magnetic separation box 101. The magnetic separator 1101 ensures that all the magnetic materials on the magnetic separation drum 104 are cleaned, and a flushing water pipe is arranged outside the magnetic separation drum 104 where the magnetic separator 1101 is located to flush water flow to remove the magnetic minerals on the surface.
By this arrangement, the maximum field intensity potential of the magnetic separation drum 104 can be adsorbed at the first time in ore feeding and roughing is completed before the tailing port, and concentration is completed between the tailing port and the ore discharge tank 103.
For ore pulp with granularity of-74 mu m accounting for 80% -95% of the total weight, ore pulp with concentration of 30% is prepared by coarse refining magnetite and weak magnetic ore through a weak magnetic separator 100, magnetite (4000 Gauss field intensity is selected) has higher grade, ore pulp is fed from an ore feeding groove 102 above the maximum field intensity of a magnetic separation roller 104, so that the magnetic mineral is timely adsorbed on the surface, when the ore pulp passes through the maximum field intensity, the magnetic field intensity is primarily reduced, meanwhile, as the magnetic separation roller 104 and the permanent magnetic group 109 are respectively autorotated, the adsorbed mineral can be conveyed to an ore discharging groove 103, agglomeration is repeatedly opened in the conveying process, the internal non-magnetic mineral is leaked out through a tailing outlet after washing, the magnetic mineral gradually becomes smaller along with the magnetic field intensity, the weak magnetic and extremely weak magnetic mineral fall off from the magnetic separation roller, further the ore is discharged from the tailing outlet, the magnetic separated concentrate is discharged from the ore discharging groove 103 to obtain magnetite, the tailings are non-magnetic mineral and extremely weak magnetic mineral, and the medium magnetic mineral is the weak magnetic mineral and extremely weak magnetic mineral, and the weak magnetic mineral is concentrated by centrifugation, and concentration of the tungsten ore concentrate is completed after entering into a strong tailing separator 200, and gravity concentration is performed.
Embodiment 3, in the above embodiment, lifting plates 1011 are disposed on two sides of the magnetic separation box 101, and the lifting plates 1011 are used for mounting the first bearing seat 106, the second bearing seat 111 and the gear motor 112;
A guide rod 1012 is fixedly arranged at the bottom of the lifting plate 1011, and the guide rod 1012 is vertically matched on the magnetic separation box 101 in a sliding way;
An upper adjusting block 1013 is installed at the bottom of the lifting plate 1011, a lower adjusting block 1014 is correspondingly arranged below the upper adjusting block 1013, the lower adjusting block 1014 is horizontally installed on the magnetic separation box 101, two sides of the lower adjusting block 1014 are respectively and independently provided with a horizontal guide rail 1015, the horizontal guide rail 1015 is fixedly installed on the magnetic separation box 101, one side of the lower adjusting block 1014 is provided with a fine crest shaft 1016, the fine crest shaft 1016 is in threaded connection on the magnetic separation box 101, and the fine crest shaft 1016 is used for horizontally pushing and pulling the lower adjusting block 1014. In practice, the lower adjusting block 1014 is horizontally moved by the fine crest shaft 1016, and the upper and lower positions of the upper adjusting block 1013 are adjusted to realize that the overall magnetic separation structure modifies the magnetic field intensity of the magnetic separation channel, thereby completing the efficient magnetic separation operation.
The bottom surface of the lower adjusting block 1014 is provided with a groove, a retaining plate 1017 is arranged in the area between the two horizontal guide rails 1015, the retaining plate 1017 corresponds to the groove in position, a vertical groove 10141 is formed in the lower adjusting block 1014, a sliding block 10142 is slidably matched in the vertical groove 10141, a spring piece is arranged at the bottom of the sliding block 10142, a sliding groove 1019 is formed in the sliding block 10142, the bottom of the sliding groove 1019 is obliquely downwards arranged and gradually approaches the fine crest shaft 1016, and a connecting pin 10191 is slidably matched in the sliding groove 1019;
the lower adjustment block 1014 is provided with a through groove on one side of the fine crest shaft 1016, the fine crest shaft 1016 is fixedly connected with the connecting pin 10191 through the through groove, and the bottom of the slider 10142 is provided with an elastic locking block 1018.
The vertical groove 10141 is a stepped hole with a large upper part and a small lower part, and is divided into an upper installation area and a lower guide area.
The elastic locking block 1018 comprises a mounting groove arranged at the bottom of the sliding block 10142, a spring body 10181 and a T-shaped block 10182 are arranged in the mounting groove, the top of the T-shaped block 10182 is in sliding fit with the inner side of the mounting groove and the top surface of the T-shaped block is in butt joint with the bottom end of the spring body 10181, a limiting block 10183 is arranged at the bottom of the mounting groove, a limiting block 10183 is sleeved on the outer side of the T-shaped block 10182, an anti-back plate 10184 is arranged at the bottom of the T-shaped block 10182, and unidirectional ratchets are arranged on one side of the anti-back plate 10184 opposite to the anti-back plate 1017.
The ore pulp is fed from the feeding tank 102 to the magnetic separation roller 104 and enters an arc-shaped magnetic separation tank 113, a horizontally biased permanent magnet group 109 is arranged in the magnetic separation roller 104, a maximum field intensity position and a minimum field intensity position are formed on the magnetic separation roller 104, and the feeding position is positioned above one side of the magnetic separation roller 104 at the maximum field intensity position;
The magnetic materials in the ore pulp are adsorbed on the magnetic separation roller 104, and the ore pulp is secondarily fed on the magnetic separation roller 104 through the feeding arc plate 1131;
The ore pulp rotates around the respective axes in the magnetic separation roller 104 and the internal permanent magnet group 109, the permanent magnet group 109 is a plurality of N poles and S poles which are alternately distributed, and the magnetic materials roll on the surface of the magnetic separation roller 104 and are conveyed to the ore discharge groove 103;
the magnetic roughing tailings are discharged through a tailing port after being washed by water flow in the arc-shaped magnetic separation tank 113, and the magnetic roughing concentrate continuously passes through the bottom area of the arc-shaped magnetic separation tank 113 and is discharged through a middling port after being washed by water flow;
The magnetic materials still adsorbed on the magnetic separation roller 104 are discharged by the ore discharging groove 103, wherein the ore discharging groove 103 is positioned below one side of the magnetic separation roller 104 at the position of the minimum field intensity;
when the fine crest shaft 1016 horizontally moves the lower adjustment block 1014 closer to the upper adjustment block 1013, it moves upward along the runner 1019 via the connecting pin 10191 and moves the slider 10142 downward to compress the spring member, so that the elastic locking block 1018 is fitted on the retaining plate 1017, thereby preventing the lower adjustment block 1014 from backing;
When the fine crest shaft 1016 moves the lower adjustment block 1014 horizontally away from the upper adjustment block 1013, it descends along the runner 1019 via the connecting pin 10191 and moves the slider 10142 upward, the spring member returns, causing the resilient lock block 1018 and the stop plate 1017 to be disengaged.
The above description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto. The substitutions may be partial structures, devices, or method steps, or may be a complete solution. The technical proposal and the invention concept are equivalent to or changed in accordance with the invention, and the invention is covered in the protection scope of the invention.
Claims (9)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104475340A (en) * | 2015-01-04 | 2015-04-01 | 湖南有色金属研究院 | Method for increasing fine-grained wolframite ore dressing recovery ratio |
| CN104941797A (en) * | 2015-05-28 | 2015-09-30 | 张宝祥 | Mineral sorting method |
| CN107377196A (en) * | 2017-07-21 | 2017-11-24 | 云南中钛科技有限公司 | A kind of sand ilmenite selects tail processing system and handling process |
| CN110813517A (en) * | 2019-11-08 | 2020-02-21 | 长春黄金研究院有限公司 | Beneficiation method for recycling wolframite from tailings |
| WO2024082323A1 (en) * | 2022-10-21 | 2024-04-25 | 鞍钢集团北京研究院有限公司 | Mixed iron ore beneficiation method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104475340A (en) * | 2015-01-04 | 2015-04-01 | 湖南有色金属研究院 | Method for increasing fine-grained wolframite ore dressing recovery ratio |
| CN104941797A (en) * | 2015-05-28 | 2015-09-30 | 张宝祥 | Mineral sorting method |
| CN107377196A (en) * | 2017-07-21 | 2017-11-24 | 云南中钛科技有限公司 | A kind of sand ilmenite selects tail processing system and handling process |
| CN110813517A (en) * | 2019-11-08 | 2020-02-21 | 长春黄金研究院有限公司 | Beneficiation method for recycling wolframite from tailings |
| WO2024082323A1 (en) * | 2022-10-21 | 2024-04-25 | 鞍钢集团北京研究院有限公司 | Mixed iron ore beneficiation method |
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