Method for recovering wolframite from argillized tungsten polymetallic ore through beneficiation

Abstract

The invention belongs to the technical field of wolframite beneficiation, and particularly relates to a method for recovering wolframite from muddy tungsten polymetallic ore through beneficiation. The magnetite is removed and the tailings are thrown through one-time rough concentration, the grade of the magnetite is high, the content of wolframite and the magnetite in the tailings can be basically neglected, the wolframite is centrifugally separated out through a centrifugal separator after concentration is matched, the grade of the wolframite is high, the recovery rate is considerable, and targeted improvement is conducted on a concentration tank. And the bearing belt for downward directional conveying is arranged in the concentration tank and is used for accelerating sedimentation and reducing the viscous effect, so that the concentration effect is greatly enhanced.

Description

Technical Field

[0001] The invention belongs to the technical field of black tungsten beneficiation, and in particular relates to a method for recovering black tungsten from muddy tungsten polymetallic ore. Background Art

[0002] Wolframite has a chemical composition of (Fe, Mn) WO4, and is a monoclinic oxide mineral. Its mineral and streak colors vary with the iron and manganese content, generally ranging from brownish red to black, with streaks ranging from yellowish brown to dark brown, with metallic to semi-metallic luster, and a complete set of plate cleavage. In addition, wolframite has a specific gravity of 7.2-7.5, a Mohs hardness of 4-4.5, and usually has this weak magnetic property.

[0003] Existing polymetallic mud ores need to undergo multiple magnetic separations to remove magnetite and non-magnetic tailings during recovery and beneficiation, which makes the production line lengthy and the process more complicated, and often results in a loss-making phenomenon, that is, the production cost is greater than the sales price of the ore. Therefore, it is necessary to develop a process method that uses a simple magnetic separation process to ensure the grade of wolframite and achieve efficient recovery. Summary of the invention

[0004] The technical problems to be solved by the present invention are:

[0005] How to efficiently recover wolframite from polymetallic mud mines.

[0006] In order to solve the above technical problems, the inventors have obtained the technical solution of the present invention through practice and summary. The magnetite is removed and the tailings are discarded through a rough concentration. The magnetite grade is high, and the tailings contain scheelite and magnetite which can be basically ignored. After concentration, the scheelite is centrifuged in a centrifugal concentrator to select the scheelite. The scheelite grade is high and the recovery rate is considerable. The technical solution is as follows:

[0007] A method for recovering black tungsten by beneficiation of tungsten polymetallic ore, comprising:

[0008] Step 1, Grinding

[0009] Grind the raw ore to obtain a clay ore with a particle size of -74μm and a weight percentage of 80%-95%, and mix the clay ore into a 30% slurry;

[0010] Step 2: Magnetic separation of magnetite

[0011] The ore pulp is subjected to weak magnetic roughing with a magnetic field strength of 4000 Gauss to obtain magnetic roughing concentrate, magnetic roughing tailings and magnetic roughing ore;

[0012] Step 3: Magnetic separation of wolframite

[0013] The ore from the magnetic roughing is subjected to strong magnetic separation at 1.0-1.3 Tesla to obtain weak magnetic separation ore and demagnetized tailings;

[0014] The weak magnetic separation ore is re-selected on a shaking table to obtain wolframite concentrate I and re-selection tailings. The re-selection tailings are re-selected by one coarse and two fine centrifugal re-selection to obtain wolframite concentrate II and wolframite centrifugal tailings. Wolframite concentrate I and wolframite concentrate II are used as target wolframite concentrates.

[0015] During production, it is necessary to concentrate it before centrifugation to ensure the recovery rate of wolframite and the grade of the mineral. Traditional concentration often only uses the sedimentation effect to achieve concentration operation. Due to the small particle size of the mud ore, it is impossible to quickly achieve sedimentation, resulting in unsatisfactory sedimentation efficiency. In step 3, the gravity separation tailings are first concentrated and then enter the centrifugal concentrator. The concentration adopts a two-stage concentration device, which includes two concentration tanks arranged in series;

[0016] The concentrating tank comprises a feed port, a concentrating port and an overflow port, a conical structure is arranged at the bottom of the concentrating tank, notches are arranged on both sides of the conical structure, polyurethane sealing strips are installed around the notches, a driver and a driven roller are installed on the side of the concentrating tank, an active transmission roller is installed at the output end of the driver, a receiving belt is wound around the active transmission roller and the driven roller, an abutment is installed in the area between the active transmission roller and the driven roller, a plurality of abutment rollers are arranged on the abutment, and the abutment rollers are used to squeeze the receiving belt on the outside of the notch.

[0017] The weak magnetic separation minerals first enter the buffer tank before entering the concentration tank, receiving and storing the slurry or water flow from the upstream process, playing a role in regulating the flow. When the slurry flow of the upstream process is too large or unstable, the buffer tank can absorb these excess flows and smoothly release the flow to the downstream process when necessary, thereby ensuring the stable operation of the entire mineral processing system. A mounting plate and a fixed plate are installed in the buffer tank, and a connecting ball is rotatably installed on the mounting plate. A connecting rod 1 is installed on the top of the connecting ball, and a stirring head is installed on the bottom. A slave gear is installed on the top of the connecting rod 1, and multiple stirring rods are hinged on the stirring head. The fixed plate is installed on the side top of the buffer tank, and a drive motor is installed on the fixed plate. A main gear is installed on the output end of the drive motor. The main gear and the slave gear are meshed, and the slave gear rotates while making circumferential motion around the periphery of the main gear.

[0018] Preferably, the weak magnetic roughing selection adopts a magnetic separator, which includes a magnetic separation box, a feeding trough and an unloading trough. An arc-shaped magnetic separation trough is arranged in the magnetic separation box, and a magnetic separation drum is installed on the magnetic separation box. A transmission shaft is installed at one end of the magnetic separation drum and a bearing seat 1 is installed on the outer side thereof, and a shaft ring is provided at the other end thereof, and a roller support seat is abutted against the lower outer side of the shaft ring. The bearing seat 1 and the roller support seat are both installed on the magnetic separation box, and a permanent magnetic group is horizontally eccentrically arranged in the magnetic separation drum. A maximum field strength position and a minimum field strength position are formed on the magnetic separation drum, and one end of the permanent magnetic group is rotatably installed on the inner side of one end of the transmission shaft of the magnetic separation drum through an eccentric disk, and the other end extends to the outer side of the shaft ring and is installed with a bearing seat 2, which is installed on the magnetic separation box. Two reduction motors are installed on the magnetic separation box, and the two reduction motors are respectively located on both sides of the magnetic separation box, and the two reduction motors are respectively used to drive the magnetic separation drum and the permanent magnetic group;

[0019] The feed chute is arranged above the side of the maximum field strength position, and the unloading chute is arranged below the side of the minimum field strength position;

[0020] A magnetic separation channel is formed between the arc-shaped magnetic separation tank and the magnetic separation drum;

[0021] There are two unloading openings on the arc-shaped magnetic separation tank, which are symmetrically distributed on both sides of the arc-shaped magnetic separation tank. The two unloading openings are the tailings opening and the middle ore opening respectively.

[0022] Preferably, an adjustable switch plate is installed at the ore discharge port.

[0023] Preferably, a magnetic isolation plate is installed on the eccentric disk, the bottom of the magnetic isolation plate covers the maximum field strength position and is higher than the top of the ore unloading chute, a top support rod is arranged between the magnetic isolation plate and the permanent magnet group, and one end of the magnetic isolation plate away from the eccentric disk extends to the outside of the magnetic separation drum through the connecting plate and is fixed on the magnetic separation box.

[0024] Preferably, lifting plates are provided on both sides of the magnetic separation box, and the lifting plates are used to install the first bearing seat, the second bearing seat and the reduction motor;

[0025] A guide rod is fixedly installed at the bottom of the lifting plate, and the guide rod is vertically slidably fitted on the magnetic separation box;

[0026] An upper adjusting block is installed at the bottom of the lifting plate, and a lower adjusting block is correspondingly arranged below the upper adjusting block. The lower adjusting block is horizontally installed on the magnetic separation box. Horizontal guide rails are independently installed on both sides of the lower adjusting block. The horizontal guide rails are fixedly installed on the magnetic separation box. A fine-thread top shaft is installed on one side of the lower adjusting block. The fine-thread top shaft is threadedly connected to the magnetic separation box. The fine-thread top shaft is used to push and pull the lower adjusting block horizontally.

[0027] Preferably, a groove is provided on the bottom surface of the lower adjustment block, a backstop plate is provided in the area between the two horizontal guide rails, the backstop plate and the groove are in corresponding positions, a vertical groove is provided on the lower adjustment block, a slider is slidably fitted in the vertical groove and a spring member is installed at the bottom of the slider, a slide groove is provided on the slider, the bottom of the slide groove is obliquely arranged downward and gradually approaches the fine thread top shaft, and a connecting pin is slidably fitted in the slide groove;

[0028] A through groove is arranged on one side of the lower adjustment block relative to the fine thread top shaft, the fine thread top shaft is connected and fixed with the connecting pin through the through groove, and an elastic locking block is arranged at the bottom of the sliding block.

[0029] Preferably, the vertical groove is a stepped hole which is larger at the top and smaller at the bottom, and is divided into an upper mounting area and a lower guide area.

[0030] Preferably, the elastic locking block includes a mounting groove arranged at the bottom of the slider, a spring body and a T-shaped block are installed in the mounting groove, the top of the T-shaped block slides in the inner side of the mounting groove and the top surface abuts against the bottom end of the spring body, a limit block is installed at the bottom of the mounting groove, the limit block is sleeved on the outer side of the T-shaped block, an anti-retreat plate is arranged at the bottom of the T-shaped block, and one-way ratchet teeth are arranged on the opposite sides of the anti-retreat plate and the stop plate.

[0031] Preferably, the slurry is fed from the feed trough to the magnetic separation drum and enters the arc-shaped magnetic separation trough. A horizontally biased permanent magnetic group is arranged inside the magnetic separation drum. A maximum field strength position and a minimum field strength position are formed on the magnetic separation drum. The feed position is located above one side of the magnetic separation drum at the maximum field strength position.

[0032] The magnetic material in the slurry is adsorbed on the magnetic separation drum, and the slurry is then fed to the magnetic separation drum for a second time through the feeding arc plate;

[0033] The ore pulp rotates around their respective axes in the magnetic separation drum and the internal permanent magnetic group. The permanent magnetic group consists of a plurality of alternating N poles and S poles. The magnetic material rolls on the surface of the magnetic separation drum and is transported to the unloading chute.

[0034] The magnetic roughing tailings are washed by water in the arc-shaped magnetic separation tank and discharged through the tailings port. The magnetic roughing concentrate continues to pass through the bottom area of ​​the arc-shaped magnetic separation tank and is washed by water, and the magnetic roughing concentrate is discharged through the middling port.

[0035] The magnetic materials still adsorbed on the magnetic separation drum are discharged from the unloading chute, where the unloading chute is located below one side of the magnetic separation drum at the minimum field strength position;

[0036] When the fine-thread top shaft moves the lower adjustment block horizontally toward the upper adjustment block, it moves upward along the slide slot through the connecting pin, and moves the slider downward to compress the spring member, so that the elastic locking block fits on the stop plate, thereby preventing the lower adjustment block from retreating;

[0037] When the fine-thread top shaft moves the lower adjusting block horizontally away from the upper adjusting block, it moves down along the slide slot through the connecting pin and moves the slider upward, and the spring member is reset, so that the elastic locking block and the stop plate are released from the adaptation state.

[0038] Compared with the prior art, the present invention has the following beneficial effects:

[0039] 1. The present invention can select magnetic concentrate by a single magnetic separation. A maximum field strength position and a minimum field strength position are formed on the magnetic separation drum by the internal horizontal eccentric arrangement of the permanent magnetic group. The maximum field strength position is used to adsorb the slurry provided by the feed trough at the first time. The internal permanent magnetic group is used to make a rotary motion with its own axis as the center. The surface of the permanent magnetic group is the N pole and S pole distributed at intervals, so that the adsorbed minerals are continuously rolled on the magnetic separation drum toward the unloading trough, repeatedly breaking the agglomeration, separating the non-magnetic minerals in the agglomeration, and washed by the water flow in the magnetic separation drum and the arc-shaped magnetic separation trough. The non-magnetic minerals are discharged from the tailings port and enter the high-intensity magnetic separator. (1.0-1.3 Tesla magnetic field strength), the adsorbed magnetic minerals and the remaining non-magnetic and very weak magnetic minerals move to the middle ore port through the bottom of the arc-shaped magnetic separation tank, and are also washed once in the process. As the magnetic field becomes smaller, a concentration operation is completed in this process. The magnetic minerals will still be adsorbed on the magnetic separation drum and continue to move to the unloading trough, and the concentrate will be unloaded in the unloading trough. The weak and very weak magnetic minerals will be discharged at the middle ore port and then enter the strong magnetic separator (1.0-1.3 Tesla magnetic field strength), thereby realizing the completion of roughing and concentrating operations by a single magnetic separation equipment, greatly saving production costs and shortening the mineral processing process.

[0040] 2. The weak magnetic and extremely weak magnetic of the present invention are used to roughly select the scheelite by a strong magnetic separator. The roughly selected scheelite ore is concentrated and centrifuged multiple times to obtain scheelite concentrate. The grade and recovery rate of the scheelite recovered in this way are improved.

[0041] 3. The present invention makes targeted improvements to the concentration tank in order to accelerate the concentration process and improve the concentration efficiency to achieve rapid concentration. Since the concentration of the bottom concentration layer is relatively high, the viscosity of the slurry will gradually increase as the concentration increases, and it is very easy for the slurry to stick to the bottom inner wall. Cleaning operations are required after each concentration, making it impossible to complete continuous concentration operations. A receiving belt for directional downward transportation is added to the concentration tank. The receiving belt is used to accelerate mineral concentration and prevent the mineral from sticking to the bottom inner wall.

[0042] 4. The present invention sets a stirring structure in the buffer tank, and uses the stirring structure to maintain the uniformity of the slurry, thereby avoiding precipitation at the location and affecting the recovery rate of black tungsten. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 This is a schematic diagram of the process of recovering black tungsten of the present invention;

[0044] Figure 2 It is the internal structure diagram of the magnetic separator of the present invention;

[0045] Figure 3 is a transverse cross-sectional view of the magnetic separator of the present invention;

[0046] Figure 4 for Figure 3 A partial enlarged view of the middle A;

[0047] Figure 5 for Figure 4 A schematic diagram of the structure of the middle elastic locking block;

[0048] Figure 6 A side view of the magnetic separation drum of the present invention away from the corresponding driver;

[0049] Figure 7 It is a schematic diagram of the structure in the buffer tank of the present invention;

[0050] Figure 8 It is a schematic diagram of the internal structure of the concentration tank of the present invention;

[0051] Fig. 9 for Figure 8 Side view of the concentrator tank. DETAILED DESCRIPTION

[0052] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0053] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0054] Embodiment 1, as Figure 1 As shown, a method for recovering black tungsten from muddy tungsten polymetallic ore by beneficiation comprises:

[0055] Step 1, Grinding

[0056] Grind the raw ore to obtain a clay ore with a particle size of -74μm and a weight percentage of 80%-95%, and mix the clay ore into a 30% slurry;

[0057] Step 2: Magnetic separation of magnetite

[0058] The ore pulp is subjected to weak magnetic roughing with a magnetic field strength of 4000 Gauss to obtain magnetic roughing concentrate, magnetic roughing tailings and magnetic roughing ore;

[0059] Step 3: Magnetic separation of wolframite

[0060] The ore from the magnetic roughing is separated by a strong magnetic separation of 1.0-1.3 Tesla, using a strong magnetic separator 200, to obtain weak magnetic separation ore and demagnetized tailings;

[0061] The weak magnetic separation ore is re-selected on a shaking table to obtain wolframite concentrate I and re-selection tailings. The re-selection tailings are re-selected by one coarse and two fine centrifugal re-selection to obtain wolframite concentrate II and wolframite centrifugal tailings. Wolframite concentrate I and wolframite concentrate II are used as target wolframite concentrates.

[0062] In step 3, the gravity separation tailings are first concentrated and then enter the centrifugal concentrator 500. The concentration adopts a secondary concentration device 400, and the secondary concentration device 400 includes two concentration tanks 401 arranged in series.

[0063] The concentrating tank 401 includes a feed port 4011, a concentrating port 4012 and an overflow port 4013. A conical structure is provided at the bottom of the concentrating tank 401. Notches 4014 are provided on both sides of the conical structure. Polyurethane sealing strips 4015 are installed around the notches 4014. The polyurethane sealing strips 4015 located at the bottom also play a role in scraping out mineral particles on the receiving belt 4019. A driver 4016 and a driven roller 4017 are installed on the side of the concentrating tank 401. An active transmission roller 4018 is installed at the output end of the driver 4016. , a receiving belt 4019 is wound around the active transmission roller 4018 and the driven roller 4017, and an abutment member 4020 is installed in the area between the active transmission roller 4018 and the driven roller 4017. A plurality of abutment rollers 4021 are arranged on the abutment member 4020. The abutment rollers 4021 are used to squeeze the receiving belt 4019 on the outside of the notch 4014 and can move downward relatively, and the downward movement speed is 3-10mm / min; wherein the receiving belt 4019 will not affect the sedimentation of particles when conveyed downward, and will not cause cross-flow inside. A switch valve and a concentration sensor are installed at the concentration port 4012, and the concentration sensor and the switch valve at the concentration port are connected to the PLC controller. The concentration signal collected by the concentration sensor is transmitted to the PLC controller, and the PLC controller determines whether the setting meets the set threshold. If it meets the threshold, the switch valve is controlled to open the concentration port to complete the concentration discharge.

[0064] The weak magnetically selected mineral first enters the buffer tank 300 before entering the concentration tank 401. The buffer tank 300 is installed with a mounting plate 301 and a fixed plate 302. A connecting ball 3011 is rotatably installed on the mounting plate 301. A connecting rod 3012 is installed on the top of the connecting ball 3011, and a stirring head 3013 is installed on the bottom. A slave gear 3014 is installed on the top of the connecting rod 3012. A plurality of stirring rods 3014 are hinged on the stirring head 3013. The fixed plate 302 is installed on the side top of the buffer tank 300. A driving motor 3021 is installed on the fixed plate 302. A main gear 3022 is installed on 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 making circumferential motion around the periphery of the main gear 3022. The main gear 3022 is driven to rotate by the driving motor 3021, and the slave gear 3014 rotates while making circumferential motion around the periphery of the main gear 3022. The stirring head 3013 at the bottom is used to stir the bottom, and the stirring rod 3014 thereon stirs the four blind corners of the buffer tank 300 to prevent precipitation.

[0065] The yield, grade and recovery rate of each process in this embodiment are as follows:

[0066]

[0067] Embodiment 2, in the above embodiment, the weak magnetic roughing adopts a magnetic separator, which includes a magnetic separation box 101, a feed trough 102, and a discharge trough 103. An arc-shaped magnetic separation trough 113 is arranged in the magnetic separation box 101, and a magnetic separation drum 104 is installed on the magnetic separation box 101. A transmission shaft 105 is installed at one end of the magnetic separation drum 104, and a bearing seat 106 is installed on the outer side, and a shaft ring 107 is installed at the other end, and a roller support seat 108 is abutted at the lower side of the outer side of the shaft ring 107. The bearing seat 106 and the roller support seat 108 are both installed on the magnetic separation box 101, and a horizontal eccentric arrangement is arranged in the magnetic separation drum 104. There is a permanent magnet group 109, a maximum field strength position and a minimum field strength position are formed on the magnetic separation drum 104, one end of the permanent magnet group 109 is rotatably mounted on the inner side of one end of the transmission shaft 105 of the magnetic separation drum 104 through an eccentric disk 110, and the other end extends to the outer side of the shaft ring 107 and is installed with a bearing seat 111, and the bearing seat 111 is installed on the magnetic separation box 101. Two reduction motors 112 are installed on the magnetic separation box 101, and the two reduction motors 112 are respectively located on both sides of the magnetic separation box 101, and the two reduction motors 112 are used to drive the magnetic separation drum 104 and the permanent magnet group 109 respectively;

[0068] The feed chute 102 is arranged above the side of the maximum field strength position, and the unloading chute 103 is arranged below the side of the minimum field strength position;

[0069] A magnetic separation channel is formed between the arc-shaped magnetic separation tank 113 and the magnetic separation drum 104;

[0070] The arc-shaped magnetic separation tank 113 is provided with two unloading openings 114 , which are symmetrically distributed on both sides of the arc-shaped magnetic separation tank 113 , and the two unloading openings 114 are a tailing opening and a middling opening respectively.

[0071] An adjustable switch plate 115 is installed at the unloading port 114, and the opening size can be selected according to the specific implementation situation through the adjustable switch plate 115, so as to obtain the required grade and recovery rate.

[0072] The eccentric disk 110 is provided with a magnetic isolation plate 1101, the bottom of which covers the maximum field strength position and is higher than the top of the unloading chute 103, and a top support rod 1102 is provided between the magnetic isolation plate 1101 and the permanent magnet group 109, one end of the top support rod 1102 is fixed on the magnetic isolation plate 1101, and the other end is rollingly installed on the permanent magnet group 109, and the end of the magnetic isolation plate 1101 away from the eccentric disk 110 extends to the outside of the magnetic separation drum 104 through the connecting plate and is fixed on the magnetic separation box 101. The magnetic isolation plate 1101 can ensure that all the magnetic materials on the magnetic separation drum 104 are cleaned up, and of course, a flushing water pipe is arranged on the outside of the magnetic separation drum 104 where the magnetic isolation plate 1101 is located to flush and remove the magnetic minerals on the surface.

[0073] This arrangement enables the maximum field strength position of the magnetic separation drum 104 to adsorb the ore at the first time when it is fed and complete the roughing before the tailings outlet, and complete the fine separation between the tailings outlet and the unloading chute 103.

[0074] The ore to be selected with a particle size of -74μm accounting for 80%-95% of the total weight is prepared into a slurry with a concentration of 30%. The magnetite and weak magnetic ore are roughly selected by the weak magnetic separator 100, and the magnetite (selected at a field strength of 4000 Gauss) has a higher grade. Specifically, the slurry is fed from the feed trough 102 to the magnetic separation drum 104 above the maximum field strength position, so that the magnetic minerals are adsorbed on the surface in time. After passing the maximum field strength position, the magnetic field strength will be initially reduced. At the same time, since the magnetic separation drum 104 and the permanent magnet group 109 are both rotating on their own, the adsorbed minerals It will be transported to the unloading chute 103 and the agglomerates will be repeatedly opened during the transportation process to expose the non-magnetic minerals inside. After washing, it will be discharged through the tailings outlet. As the magnetic field strength gradually decreases, the weakly magnetic and extremely weakly magnetic minerals fall off the magnetic separation drum and are then discharged from the middle ore outlet. The magnetically separated concentrate is discharged from the unloading chute 103 to obtain magnetite. The tailings are non-magnetic ore, and the middle ore is weakly magnetic ore and extremely weakly magnetic ore. The weakly magnetic ore and extremely weakly magnetic ore are selected and discarded in the strong magnetic separator 200. The selected magnetic minerals are then concentrated and centrifuged for re-selection to obtain black tungsten concentrate.

[0075] Embodiment 3, in the above embodiment, lifting plates 1011 are provided on both sides of the magnetic separation box 101, and the lifting plates 1011 are used to install the bearing seat 1 106, the bearing seat 2 111 and the reduction motor 112;

[0076] A guide rod 1012 is fixedly installed at the bottom of the lifting plate 1011, and the guide rod 1012 is vertically slidably fitted on the magnetic separation box 101;

[0077] An upper adjustment block 1013 is installed at the bottom of the lifting plate 1011, and a lower adjustment block 1014 is correspondingly arranged below the upper adjustment block 1013. The lower adjustment block 1014 is horizontally installed on the magnetic separation box 101, and horizontal guide rails 1015 are independently installed on both sides of the lower adjustment block 1014. The horizontal guide rails 1015 are fixedly installed on the magnetic separation box 101, and a fine-thread top shaft 1016 is installed on one side of the lower adjustment block 1014. The fine-thread top shaft 1016 is threadedly connected to the magnetic separation box 101, and the fine-thread top shaft 1016 is used to horizontally push and pull the lower adjustment block 1014. During implementation, the lower adjustment block 1014 is horizontally moved through the fine-thread top shaft 1016, and the upper adjustment block 1013 is adjusted up and down to realize the overall magnetic separation structure to modify the magnetic field strength of the magnetic separation channel, thereby completing efficient magnetic separation operations.

[0078] The bottom surface of the lower adjustment block 1014 is provided with a groove, and the area between the two horizontal guide rails 1015 is provided with a backstop plate 1017, and the backstop plate 1017 corresponds to the position of the groove. The lower adjustment block 1014 is provided with a vertical groove 10141, and a slider 10142 is slidably matched in the vertical groove 10141, and a spring member is installed at the bottom of the slider 10142, and a slide groove 1019 is provided on the slider 10142, and the bottom of the slide groove 1019 is obliquely arranged downward and gradually approaches the fine thread top shaft 1016, and a connecting pin 10191 is slidably matched in the slide groove 1019;

[0079] A through groove is provided on one side of the lower adjustment block 1014 relative to the fine thread top shaft 1016 , and the fine thread top shaft 1016 is connected and fixed to the connecting pin 10191 through the through groove, and an elastic locking block 1018 is provided at the bottom of the slider 10142 .

[0080] The vertical groove 10141 is a stepped hole that is larger at the top and smaller at the bottom, and is divided into an upper mounting area and a lower guide area.

[0081] The elastic locking block 1018 includes a mounting groove arranged at the bottom of the slider 10142, in which a spring body 10181 and a T-shaped block 10182 are installed, the top of the T-shaped block 10182 slides in the inner side of the mounting groove and the top surface abuts against the bottom end of the spring body 10181, a limit block 10183 is installed at the bottom of the mounting groove, the limit block 10183 is sleeved on the outer side of the T-shaped block 10182, an anti-recoil plate 10184 is arranged at the bottom of the T-shaped block 10182, and one-way ratchets are arranged on the opposite sides of the anti-recoil plate 10184 and the stop plate 1017.

[0082] The ore pulp is fed from the feed trough 102 to the magnetic separation drum 104 and enters the arc-shaped magnetic separation trough 113. A horizontally biased permanent magnetic group 109 is arranged inside the magnetic separation drum 104. A maximum field strength position and a minimum field strength position are formed on the magnetic separation drum 104. The feed position is located above one side of the magnetic separation drum 104 at the maximum field strength position.

[0083] The magnetic material in the slurry is adsorbed on the magnetic separation drum 104, and the slurry is then fed to the magnetic separation drum 104 for a second time through the feeding arc plate 1131;

[0084] The ore pulp rotates around their respective axes in the magnetic separation drum 104 and the internal permanent magnet group 109. The permanent magnet group 109 has a plurality of alternately distributed N poles and S poles. The magnetic material rolls on the surface of the magnetic separation drum 104 and is transported to the unloading chute 103.

[0085] The magnetic roughing tailings are washed by water in the arc-shaped magnetic separation tank 113 and discharged through the tailings port. The magnetic roughing concentrate continues to pass through the bottom area of ​​the arc-shaped magnetic separation tank 113 and is washed by water, and the magnetic roughing concentrate is discharged through the middling port.

[0086] The magnetic materials still adsorbed on the magnetic separation drum 104 are discharged from the unloading chute 103, wherein the unloading chute 103 is located below one side of the magnetic separation drum 104 at the minimum field strength position;

[0087] When the fine-thread top shaft 1016 moves the lower adjustment block 1014 horizontally toward the upper adjustment block 1013, it moves upward along the slide slot 1019 via the connecting pin 10191, and moves the slider 10142 downward to compress the spring member, so that the elastic locking block 1018 fits on the stop plate 1017, thereby preventing the lower adjustment block 1014 from retreating;

[0088] When the fine-tooth top shaft 1016 moves the lower adjustment block 1014 horizontally away from the upper adjustment block 1013, it moves downward along the slide groove 1019 through the connecting pin 10191, and moves the slider 10142 upward, and the spring member is reset, so that the elastic locking block 1018 and the stop plate 1017 are released from the adaptation state.

[0089] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. The replacement may be a replacement of a part of the structure, device, method step, or a complete technical solution. Any equivalent replacement or change according to the technical solution and the inventive concept of the present invention shall be covered within the protection scope of the present invention.

Claims

1. A method for recovering black tungsten from muddy tungsten polymetallic ore, characterized in that: include: Step 1, Grinding Grind the raw ore to obtain a clay ore with a particle size of -74μm and a weight percentage of 80%-95%, and mix the clay ore into a 30% slurry; Step 2: Magnetic separation of magnetite The ore pulp is subjected to weak magnetic roughing with a magnetic field strength of 4000 Gauss to obtain magnetic roughing concentrate, magnetic roughing tailings and magnetic roughing ore; Step 3: Magnetic separation of wolframite The ore from the magnetic roughing is subjected to strong magnetic separation at 1.0-1.3 Tesla to obtain weak magnetic separation ore and demagnetized tailings; The weak magnetic separation ore is re-selected on a shaking table to obtain wolframite concentrate I and re-selection tailings. The re-selection tailings are re-selected by one coarse and two fine centrifugal re-selection to obtain wolframite concentrate II and wolframite centrifugal tailings. Wolframite concentrate I and wolframite concentrate II are used as target wolframite concentrates. In step 3, the gravity separation tailings are first concentrated and then enter the centrifugal concentrator, and the concentration adopts a two-stage concentration device (400), and the two-stage concentration device (400) includes two concentration tanks (401) arranged in series; The concentrating tank (401) comprises a feed port (4011), a concentrating port (4012) and an overflow port (4013). A conical structure is provided at the bottom of the concentrating tank. Notches (4014) are provided on both sides of the conical structure. Polyurethane sealing strips (4015) are installed around the notches (4014). A driver (4016) and a driven roller (4017) are installed on the side of the concentrating tank (401). The output end of the driver (4016) is provided with a There is an active transmission roller (4018), a receiving belt (4019) is wound around the active transmission roller (4018) and the driven roller (4017), an abutment member (4020) is installed in the area between the active transmission roller (4018) and the driven roller (4017), a plurality of abutment rollers (4021) are arranged on the abutment member (4020), and the abutment rollers (4021) are used to squeeze the receiving belt (4019) on the outside of the notch (4014); The weak magnetic separation mineral first enters the buffer tank (300) before entering the concentration tank (401). The buffer tank (300) is equipped with a mounting plate (301) and a fixing plate (302). A connecting ball (3011) is rotatably mounted on the mounting plate (301). A connecting rod (3012) is mounted on the top of the connecting ball (3011), and a stirring head (3013) is mounted on the bottom. A slave gear (3014) is mounted on the top of the connecting rod (3012). A plurality of stirring rods (3014) are hingedly connected to the stirring head (3013); a fixing plate (302) is installed on the side top of the buffer tank (300); a driving motor (3021) is installed on the fixing plate (302); a main gear (3022) is installed 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 performing circumferential motion around the periphery of the main gear (3022).

2. The method for recovering black tungsten from muddy tungsten polymetallic ore according to claim 1, characterized in that: The weak magnetic roughing separation adopts a magnetic separator, which comprises a magnetic separation box (101), an ore feeding trough (102), and an ore unloading trough (103). An arc-shaped magnetic separation trough (113) is arranged in the magnetic separation box (101). A magnetic separation drum (104) is installed on the magnetic separation box (101). A transmission shaft (105) is installed at one end of the magnetic separation drum (104), and a bearing seat 1 (106) is installed on the outer side thereof. The other end is a shaft ring (107), and a roller support seat (108) is abutted at the lower side of the outer side of the shaft ring (107). The bearing seat 1 (106) and the roller support seat (108) are both installed on the magnetic separation box (101). A permanent magnetic group (113) is horizontally eccentrically arranged in the magnetic separation drum (104). 09), a maximum field strength position and a minimum field strength position are formed on the magnetic separation drum (104), one end of the permanent magnet group (109) is rotatably mounted on the inner side of one end of the transmission shaft (105) provided on the magnetic separation drum (104) through an eccentric disk (110), and the other end extends to the outer side of the shaft ring (107) and is mounted with a second bearing seat (111), the second bearing seat (111) is mounted on the magnetic separation box (101), and two reduction motors (112) are mounted on the magnetic separation box (101), the two reduction motors (112) are respectively located on both sides of the magnetic separation box (101), and the two reduction motors (112) are respectively used to drive the magnetic separation drum (104) and the permanent magnet group (109); The feed chute (102) is arranged above the side of the maximum field strength position, and the unloading chute (103) is arranged below the side of the minimum field strength position; A magnetic separation channel is formed between the arc-shaped magnetic separation tank (113) and the magnetic separation roller (104); The arc-shaped magnetic separation tank (113) is provided with two ore discharge openings (114), which are symmetrically distributed on both sides of the arc-shaped magnetic separation tank (113), and the two ore discharge openings (114) are respectively a tailings opening and a middling opening.

3. The method for recovering black tungsten from muddy tungsten polymetallic ore according to claim 2, characterized in that: An adjustable switch plate (115) is installed at the ore discharge port (114).

4. The method for recovering black tungsten from muddy tungsten polymetallic ore according to claim 2, characterized in that: A magnetic isolation plate (1101) is installed on the eccentric disk (110), the bottom of the magnetic isolation plate (1101) covers the maximum field strength position and is higher than the top of the ore unloading chute (103), a top support rod (1102) is arranged between the magnetic isolation plate (1101) and the permanent magnet group (109), and one end of the magnetic isolation plate (1101) away from the eccentric disk (110) extends to the outside of the magnetic separation drum (104) through a connecting plate and is fixed on the magnetic separation box (101).

5. The method for recovering black tungsten from muddy tungsten polymetallic ore according to claim 2, characterized in that: Lifting plates (1011) are provided on both sides of the magnetic separation box (101), and the lifting plates (1011) are used to install a bearing seat 1 (106), a bearing seat 2 (111) and a reduction motor (112); A guide rod (1012) is fixedly installed at the bottom of the lifting plate (1011), and the guide rod (1012) is vertically slidably fitted on the magnetic separation box (101); An upper adjustment block (1013) is installed at the bottom of the lifting plate (1011), and a lower adjustment block (1014) is correspondingly arranged below the upper adjustment block (1013). The lower adjustment block (1014) is horizontally installed on the magnetic separation box (101). Horizontal guide rails (1015) are independently installed on both sides of the lower adjustment block (1014), and the horizontal guide rails (1015) are fixedly installed on the magnetic separation box (101). A fine thread top shaft (1016) is installed on one side of the lower adjustment block (1014), and the fine thread top shaft (1016) is threadedly connected to the magnetic separation box (101), and the fine thread top shaft (1016) is used to push and pull the lower adjustment block (1014) horizontally.

6. The method for recovering black tungsten from muddy tungsten polymetallic ore according to claim 6, characterized in that: The bottom surface of the lower adjustment block (1014) is provided with a groove, and the area between the two horizontal guide rails (1015) is provided with a backstop plate (1017), the backstop plate (1017) and the groove are located in corresponding positions, and the lower adjustment block (1014) is provided with a vertical groove (10141), a slider (10142) is slidably matched in the vertical groove (10141), and a spring member is installed at the bottom of the slider (10142), and a slide groove (1019) is provided on the slider (10142), the bottom of the slide groove (1019) is obliquely arranged downward and gradually approaches the fine tooth top shaft (1016), and a connecting pin (10191) is slidably matched in the slide groove (1019); A through groove is provided on one side of the lower adjustment block (1014) relative to the fine thread top shaft (1016), and the fine thread top shaft (1016) is connected and fixed with the connecting pin (10191) through the through groove, and an elastic locking block (1018) is provided at the bottom of the slider (10142).

7. The method for recovering black tungsten from muddy tungsten polymetallic ore according to claim 6, characterized in that: The vertical groove (10141) is a stepped hole that is larger at the top and smaller at the bottom, and is divided into an upper mounting area and a lower guide area.

8. The method for recovering black tungsten from muddy tungsten polymetallic ore according to claim 6, characterized in that: The elastic locking block (1018) includes a mounting groove arranged at the bottom of the slider (10142), a spring body (10181) and a T-shaped block (10182) are installed in the mounting groove, the top of the T-shaped block (10182) is slidably matched with the inner side of the mounting groove and the top surface is in contact with the bottom end of the spring body (10181), a limit block (10183) is installed at the bottom of the mounting groove, the limit block (10183) is sleeved on the outer side of the T-shaped block (10182), an anti-recoil plate (10184) is arranged at the bottom of the T-shaped block (10182), and one-way ratchets are arranged on the opposite sides of the anti-recoil plate (10184) and the stop plate (1017).

9. The method for recovering black tungsten from muddy tungsten polymetallic ore according to claim 8, characterized in that: The ore pulp is fed from the feed trough (102) to the magnetic separation drum (104) and enters the arc-shaped magnetic separation trough (113). A horizontally biased permanent magnet group (109) is arranged inside the magnetic separation drum (104). A maximum field strength position and a minimum field strength position are formed on the magnetic separation drum (104). The feed position is located above one side of the magnetic separation drum (104) at the maximum field strength position. The magnetic material in the ore pulp is adsorbed on the magnetic separation drum (104), and the ore pulp is then fed to the magnetic separation drum (104) for a second time through the feeding arc plate (1131); The ore pulp rotates around respective axes in the magnetic separation drum (104) and the internal permanent magnetic group (109), the permanent magnetic group (109) is a plurality of N poles and S poles that are alternately distributed, and the magnetic material rolls on the surface of the magnetic separation drum (104) and is transported to the ore discharge chute (103); The magnetic roughing tailings are washed by water in the arc-shaped magnetic separation tank (113) and discharged through the tailings outlet; the magnetic roughing concentrate continues to pass through the bottom area of ​​the arc-shaped magnetic separation tank (113) and is washed by water, and the magnetic roughing concentrate is discharged through the intermediate ore outlet; The magnetic material still adsorbed on the magnetic separation drum (104) is discharged through the unloading chute (103), wherein the unloading chute (103) is located below one side of the magnetic separation drum (104) at the minimum field strength position; When the fine-tooth top shaft (1016) moves the lower adjustment block (1014) horizontally toward the upper adjustment block (1013), the connecting pin (10191) moves upward along the slide groove (1019), and the slider (10142) moves downward to compress the spring member, so that the elastic locking block (1018) fits on the stop plate (1017), thereby preventing the lower adjustment block (1014) from retreating; When the fine-thread top shaft (1016) moves the lower adjustment block (1014) horizontally away from the upper adjustment block (1013), it moves downward along the slide groove (1019) through the connecting pin (10191) and moves the slider (10142) upward, and the spring member is reset, so that the elastic locking block (1018) and the stop plate (1017) are released from the adapted state.

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