Equipment for recovering wolframite from polymetallic ore through combination of strong magnetism and gravity separation

Abstract

The invention discloses a polymetallic ore strong magnetic separation-gravity separation combined wolframite recovery device which comprises a weak magnetic separator (100), a strong magnetic separator (200), a buffer tank I (300), a buffer tank II (500) and a centrifugal separator (600), magnetite concentrate, wolframite coarse ore and tailings (discarded tailings) can be separated through single magnetic separation, the handling capacity of strong magnetic separation is reduced, the production cost is saved, and the production efficiency is improved. The rough wolframite ore obtained through roughing is subjected to concentration and multiple times of centrifugal operation to obtain wolframite concentrate, and the grade and the recovery rate recovered through the mode are both improved.

Description

Technical Field

[0001] The invention belongs to the technical field of black tungsten beneficiation, and specifically relates to a device for recovering black tungsten by combining strong magnetic and gravity separation of polymetallic ores. 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] CN106669964A discloses a method for recovering wolframite from tailings, which includes the following steps: (1) centrifuge gravity separation tailings pre-enrichment; (2) flotation desulfurization ore; (3) magnetic separation to remove magnetic impurities; (4) high gradient magnetic separation to enrich wolframite; (5) coarse-grained wolframite shaking table gravity separation; (6) fine-grained wolframite flotation. The process is complicated and the magnetic separation equipment is corroded by flotation and then magnetic separation. Secondly, the existing magnetite and wolframite cannot obtain a higher magnetite concentrate when separated, so that the associated iron ore cannot obtain a higher grade. At the same time, the processing volume of wolframite during gravity separation is large, which increases the production cost. Summary of the invention

[0004] In order to solve the above technical problems, the inventors have obtained the technical solution of the present invention through practice and summary. The present invention adopts the following technical solution:

[0005] A device for recovering black tungsten by strong magnetic separation and gravity separation of polymetallic ores, comprising:

[0006] A weak magnetic separator 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. 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. The other end is a shaft ring, and a roller support seat is abutted at the lower side of the outer side of the shaft ring. The bearing seat 1 and the roller support seat are both installed on the magnetic separation box. 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. 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. The other end of the permanent magnetic group is installed on the inner side of one end of the transmission shaft of the magnetic separation drum. One end extends to the outside of the shaft ring and is installed with a second bearing seat, which is installed on the magnetic separation box. Two reduction motors are installed on the magnetic separation box. The two reduction motors are respectively located on both sides of the magnetic separation box, and the two reduction motors are used to drive the magnetic separation drum and the permanent magnet group respectively. The feed trough is arranged above the side of the maximum field strength position, and the unloading trough is arranged below the side of the minimum field strength position. A magnetic separation channel is formed between the arc-shaped magnetic separation trough and the magnetic separation drum. Two unloading ports are arranged on the arc-shaped magnetic separation trough, which are symmetrically distributed on both sides of the arc-shaped magnetic separation trough. The two unloading ports are respectively a tailing port and a medium ore port.

[0007] A strong magnetic separator is connected to the intermediate ore port, and is provided with a magnetic concentrate port and a demagnetization ore outlet;

[0008] Buffer tank 1, buffer tank 1 is connected to the magnetic separation concentrate port;

[0009] The concentrator tank is connected to the buffer tank and is used to concentrate the pulp to a concentration controlled at 30% ± 5 percentage points. The concentrator tank is provided with a feed port, a concentrated pulp outlet and an overflow port. A baffle is provided in the concentrator tank. The bottom of the baffle is inclined downward toward the side close to the feed port, and a gap is reserved between the bottom and the inner wall of the concentrator tank.

[0010] Buffer tank 2, buffer tank 2 is connected to the concentration outlet of the concentration tank;

[0011] The centrifugal concentrator and the buffer tank are connected to each other for centrifugal separation to obtain black tungsten concentrate.

[0012] In the present application, the baffle surface is evenly distributed with uniform flow holes, which are arranged horizontally. The uniform flow holes are used to perform preliminary concentration and reduce the surging degree of the internal slurry.

[0013] In the present application, the bottom of the concentration tank is conical, and symmetrically distributed notches are arranged on both sides. A receiving belt is installed at the notch, and conveying rollers are arranged at both ends of the receiving belt. The conveying rollers are used to drive the receiving belt to convey downward along the notch, and a polyurethane sealing strip is arranged at the notch;

[0014] A contact piece is provided at the bottom of the concentration tank, and the contact piece crosses the inner side of the receiving belt. A plurality of squeezing rollers are evenly distributed on the contact piece, and the squeezing rollers are used to contact the receiving belt against the outer side of the notch without affecting the downward conveying action of the receiving belt.

[0015] One set of conveying rollers is externally connected to a driving motor.

[0016] During implementation, the driving motor is used to drive the conveyor roller to rotate, and then the receiving belt is transported downward to accelerate the concentration. Since the higher the concentration of the slurry, the greater the viscosity, it is easy to form dense lumps in the concentration tank, so it needs to be cleaned in time. It should be noted that the speed of the conveyor roller is very slow, which will not cause the slurry to surge in the tank (that is, the slurry will not flow or surge there). The speed is between 5mm / min-100 / min, which is selected according to the specific situation on site.

[0017] In the present application, a vibration block is provided on the side of the baffle plate facing away from the feed inlet. The vibration block is used to prevent particles from settling and sticking on the side of the baffle plate facing the feed inlet, and the vibration frequency and amplitude of the vibration block should be strictly controlled, with the frequency between 1-3 Hz and the amplitude between 0.1-0.5 mm, to prevent the violent vibration from affecting the sedimentation effect.

[0018] In the present application, the overflow port is externally connected to a secondary concentration tank, which performs secondary concentration sedimentation on the overflow slurry to obtain secondary concentrated slurry and enters the buffer tank 2. The overflow slurry needs to be recovered again to ensure the recovery rate of the minerals.

[0019] In the present application, a magnetic isolation plate is installed on the eccentric disk, the bottom of which covers the maximum field strength position and is higher than the top of the unloading chute, a top support rod is arranged between the magnetic isolation plate and the permanent magnetic group, and the 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 to the magnetic separation box. The magnetic isolation plate is used to block the passage of the magnetic field to prevent the magnetic minerals bonded to the magnetic separation drum from being able to be detached in time to complete the unloading.

[0020] In this application, in actual production, the concentrate grade adjustment or tailings grade adjustment, raw material supply change are often encountered, and then the field strength and unit processing capacity of the magnetic separation equipment need to be adjusted. Therefore, the following adjustments are made:

[0021] 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;

[0022] 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. 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, and 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, and 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, and the fine-thread top shaft is used to push and pull the lower adjusting block horizontally.

[0023] During implementation, fine adjustments are made through the fine tooth top shaft, and the distance between the magnetic separation drum and the arc-shaped magnetic separation tank is adjusted through the upper and lower adjustment blocks, thereby changing the magnetic separation field strength and unit processing capacity.

[0024] In the present application, since the overall weight of the magnetic separation component is large and vibration occurs during the magnetic separation operation, it will cause wear or loosening of the fine tooth top shaft, which will lead to changes in the processing volume and magnetic field strength of the magnetic separation operation, and ultimately lead to unsatisfactory magnetic separation effects. Therefore, the following improvements are made:

[0025] The bottom surface of the lower adjustment block is provided with a groove, and the area between the two horizontal guide rails is provided with a backstop plate, 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;

[0026] 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.

[0027] During implementation, one-way feeding is completed through the elastic locking block and the anti-retraction plate to avoid position deviation of the upper and lower adjustment blocks, thereby achieving stability of the magnetic field during the magnetic separation operation and ensuring the magnetic separation effect.

[0028] In the present application, the vertical slot 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. The upper mounting area is used to mount a connecting pin and a fine-thread top shaft.

[0029] In the present application, 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 mounted 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 ratchets are arranged on the opposite sides of the anti-retreat plate and the stop plate.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] 1. In the present invention, since the particle size of the raw ore is -74μm, accounting for 80%-95% of the weight, a single magnetic separation can be used to select the magnet concentrate. The permanent magnetic group arranged horizontally and eccentrically inside forms a maximum field strength position and a minimum field strength position on the magnetic separation drum. The maximum field strength position is used to adsorb the slurry given 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 an N pole and an S pole distributed at intervals, so that the adsorbed minerals on the magnetic separation drum continuously roll toward the unloading trough, repeatedly break the agglomeration, separate the non-magnetic minerals in the agglomeration, and are washed by the water flow in the magnetic separation drum and the arc-shaped magnetic separation trough. The non-magnetic minerals are The tailings are discharged from the outlet into a strong magnetic separator (magnetic field strength of 1.0-1.3 Tesla). The adsorbed magnetic minerals and the remaining non-magnetic and very weak magnetic minerals move to the middle ore outlet through the bottom of the arc-shaped magnetic separation trough, 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 outlet and then enter the strong magnetic separator (magnetic field strength of 1.0-1.3 Tesla), thereby realizing the completion of roughing and concentration operations by a single magnetic separation equipment, greatly saving production costs and shortening the mineral processing process.

[0032] 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.

[0033] 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, a baffle inclined downward is set in the concentration tank, and the slurry is initially concentrated by using the baffle. During the concentration process, part of the slurry may stick to the surface of the baffle, so a vibration block is added to effectively reduce the residence time on the baffle to avoid sticking. At the same time, due to the high concentration of the bottom concentration layer, the viscosity of the slurry will gradually increase as the concentration increases, and it is very easy to stick to the bottom inner wall. After each concentration, cleaning operations are required, making it impossible to complete continuous concentration operations. A receiving belt for directional downward transportation is added in the present concentration tank. The receiving belt is used to accelerate mineral concentration and prevent minerals from sticking to the bottom inner wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the structure of the equipment system of the present invention;

[0035] Figure 2 It is a structural schematic diagram of a weak magnetic separator of the present invention;

[0036] Figure 3 for Figure 2 Transverse section of a weak magnetic separator;

[0037] Figure 4 for Figure 3 A partial enlarged view of the middle A;

[0038] Figure 5 for Figure 4 A schematic diagram of the structure of the middle elastic locking block;

[0039] Figure 6 It is a side view of the magnetic separation drum and the permanent magnet group of the present invention;

[0040] Figure 7 The internal structure diagram of the concentration tank of the present invention;

[0041] Figure 8 for Figure 7 Side view of the bottom of the intermediate concentrator tank.

[0042] In the figure: 100, weak magnetic separator; 101, magnetic separator box; 1011, lifting plate; 1012, guide rod; 1013, upper adjustment block; 1014, lower adjustment block; 10141, vertical slot; 10142, slider; 1015, horizontal guide rail; 1016, fine thread top shaft; 1017, stop plate; 1018, elastic locking block; 10181, spring body; 10182, T-shaped block; 10183, limit block; 1 0184, anti-recoil plate; 1019, slide; 10191, connecting pin; 102, feed chute; 103, unloading chute; 104, magnetic separation drum; 105, transmission shaft; 106, bearing seat 1; 107, shaft ring; 108, roller support seat; 109, permanent magnet group; 110, eccentric disk; 1101, magnetic isolation plate; 111, bearing seat 2; 112, reduction motor; 113, arc-shaped magnetic separation chute; 114, unloading port;

[0043] 200. Strong magnetic separator;

[0044] 300, buffer tank one;

[0045] 400, concentration tank; 401, feed port; 402, concentrated slurry outlet; 403, overflow port; 404, baffle; 405, receiving belt; 406, conveying roller; 407, polyurethane sealing strip; 408, abutment member; 409, driving motor; 410, vibration block;

[0046] 500, buffer tank 2;

[0047] 600. Centrifugal concentrator;

[0048] 700. Secondary concentration tank. DETAILED DESCRIPTION

[0049] 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.

[0050] 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.

[0051] Example 1

[0052] like Figures 1 to 6 As shown, a device for recovering black tungsten by strong magnetic separation and gravity separation of polymetallic ores comprises:

[0053] A weak magnetic separator 100 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. 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. 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 106 and the roller support seat 108 are both installed on the magnetic separation box 101. A permanent magnetic group 109 is horizontally eccentrically arranged in the magnetic separation drum 104. A maximum field strength position and a minimum field strength position are formed on the magnetic separation drum 104. One end of the permanent magnetic group 109 is rotatably mounted on the transmission shaft 105 arranged on the magnetic separation drum 104 through an eccentric disk 110. 5, and the other end extends to the outside of the shaft ring 107 and is installed with a bearing seat 2 111, which is installed on the magnetic separation box 101. Two reduction motors 112 are installed 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 trough 102 is arranged above the side of the maximum field strength position, and the unloading trough 103 is arranged below the side of the minimum field strength position. A magnetic separation channel is surrounded between the arc-shaped magnetic separation trough 113 and the magnetic separation drum 104. Two unloading ports 114 are arranged on the arc-shaped magnetic separation trough 113. The unloading ports 114 are symmetrically distributed on both sides of the arc-shaped magnetic separation trough 113. The two unloading ports 114 are respectively a tailing port and a medium ore port;

[0054] A strong magnetic separator 200, which is connected to the intermediate ore port, and is provided with a magnetic concentrate port and a demagnetization ore outlet port;

[0055] Buffer tank 1 300, buffer tank 1 300 is connected to the magnetic separation concentrate port;

[0056] Concentrator 400, which is connected to buffer tank 1 300 and is used to concentrate the pulp to a concentration controlled at 30% ± 5 percentage points. Concentrator 400 is provided with a feed port 401, a concentrated pulp outlet 402 and an overflow port 403. A baffle 404 is provided in the concentrator 400. The bottom of the baffle 404 is obliquely downwardly arranged toward a side close to the feed port 401, and a gap is reserved between the bottom and the inner wall of the concentrator 400.

[0057] Buffer tank 2 500, buffer tank 2 500 is connected to the concentration outlet of concentration tank 400;

[0058] The centrifugal concentrator 600 is connected to the buffer tank 2 500 for centrifugal separation to obtain black tungsten concentrate.

[0059] 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 initially decrease. 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 will move to the unloading The ore trough 103 is transported and repeatedly opened during the transportation process to expose the non-magnetic minerals inside. After washing, it is discharged from the tailings port. As the magnetic field strength gradually decreases, the weak magnetic and very weak magnetic minerals fall off the magnetic separation drum and are discharged from the middle ore port. The magnetically selected concentrate is discharged from the unloading trough 103 to obtain magnetite. The tailings are non-magnetic ores, and the middle ore is weak magnetic ores and very weak magnetic ores. The weak magnetic ores and very weak magnetic ores enter the strong magnetic separator 200 to complete the selection and tailings. The selected magnetic minerals are then concentrated and centrifuged to obtain black tungsten concentrate and black tungsten centrifugal middle ore. After the weak magnetic ore is selected, it enters the buffer tank 300, is concentrated to a concentration of 30% by the baffle 404 and sedimentation treatment, and is centrifuged and re-selected by the centrifugal concentrator 600. After re-selection, it is again adjusted to a concentration of 30%, and then centrifuged and re-selected. After three centrifugal re-selections, black tungsten concentrate and black tungsten centrifugal middle ore are finally obtained.

[0060] Example 2

[0061] like Figure 7 As shown, in the device, the baffle 404 is evenly distributed with uniform flow holes, and the uniform flow holes are arranged horizontally, which greatly reduces the cross-flow phenomenon of the slurry in the concentration tank 400.

[0062] In the device, the bottom of the concentration tank 400 is conical, and symmetrically distributed notches are set on both sides. A receiving belt 405 is installed at the notch. Both ends of the receiving belt 405 are equipped with conveying rollers 406. The conveying rollers 406 are used to drive the receiving belt 405 to convey downward along the notch. A polyurethane sealing strip 407 is set at the notch. The polyurethane sealing strip 407 located at the lower side is used for sealing and also has a certain scraping effect, which is used to clean the minerals on the surface of the receiving belt 405. The receiving belt 405 is made of anti-sticking and wear-resistant material, and is not prone to short-term over-wear problems.

[0063] Abutment 408 is provided at the bottom of the concentrating tank 400. The abutment 408 crosses the inner side of the receiving belt 405. A plurality of squeezing rollers are evenly distributed on the abutment 408. The squeezing rollers are used to abut the receiving belt 405 against the outer side of the notch without affecting the downward conveying action of the receiving belt 405. The abutment 408 is fixed to the concentrating tank 400 by bolts, and the receiving belt 405 is attached to the notch by squeezing rollers to prevent the mineral from leaking out.

[0064] One set of conveying rollers 406 is externally connected to a driving motor 409. The driving motor 409 is used to drive the receiving belt 405 to convey the concentrated slurry in a directional manner downward. A concentration sensor and a switch valve are installed at the concentrated slurry outlet. The concentration sensor and the switch valve at the concentrated slurry outlet are connected via a PLC controller. The concentration signal collected by the concentration sensor is transmitted to the PLC controller. The PLC controller determines whether the setting meets the set threshold. If it meets the threshold, the switch valve is controlled to open the concentrated slurry outlet to complete the concentrated discharge.

[0065] In the device, a vibration block 410 is provided on the side of the baffle 404 facing away from the feed inlet 401 .

[0066] In the device, Figure 1 As shown, the overflow port 403 is externally connected to a secondary concentration tank 700 , and the secondary concentration tank 700 performs secondary concentration sedimentation on the overflow slurry to obtain secondary concentrated slurry and enters the buffer tank 2 500 .

[0067] Example 3

[0068] In the device, Figure 2 , Figure 3 , Figure 6, 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 unloading chute 103, a top support rod 1102 is arranged between the magnetic isolation plate 1101 and the permanent magnetic group 109, and the top support rod 1102 can be a threaded telescopic rod, and the end of the top support rod 1102 away from the magnetic isolation plate 1101 is rolled and installed on the outside of the permanent magnetic 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 blocks the position above the minimum field strength position to prevent the magnetic minerals on the surface of the magnetic separation drum 103 from continuing to be adsorbed on the surface, and complete the unloading as much as possible. The flushing pipe can be used for flushing during unloading.

[0069] Example 4

[0070] In the device, Figures 3 to 5 As shown, 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;

[0071] 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 adjusting block 1013 is installed at the bottom of the lifting plate 1011, and 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, and horizontal guide rails 1015 are independently installed on both sides of the lower adjusting 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 adjusting 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 push and pull the lower adjusting block 1014 horizontally. During implementation, the lower adjustment block 1014 is moved horizontally via the fine-tooth 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 an efficient magnetic separation operation.

[0072] In the device, a groove is provided on the bottom surface of the lower adjustment block 1014, a backstop plate 1017 is provided in the area between the two horizontal guide rails 1015, the backstop plate 1017 and the groove are in corresponding positions, a vertical groove 10141 is provided on the lower adjustment block 1014, a slider 10142 is slidably fitted in the vertical groove 10141, and a spring member is installed at the bottom of the slider 10142, the spring member is located in the vertical groove 10141, 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 fitted in the slide groove 1019;

[0073] 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 .

[0074] In the device, 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. The upper mounting area is used to install the connecting pin 10191 and the fine-tooth top shaft 1016, and the lower guide area is used for vertical guidance of the slider 10142.

[0075] In the device, 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.

[0076] 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 is adapted to the backstop 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 slot 1019 via 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 backstop plate 1017 are released from the adaptation state.

[0077] 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 device for recovering black tungsten by strong magnetic separation and gravity separation of polymetallic ores, characterized in that: include: A weak magnetic separator (100) includes 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 (106) is installed on the outer side. The other end is a shaft ring (107) and the shaft ring A roller support seat (108) is abutted at the lower outer side of (107), and the bearing seat (106) and the roller support seat (108) are both mounted on the magnetic separation box (101). A permanent magnet group (109) is horizontally eccentrically arranged in the magnetic separation drum (104), and 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 magnetic separation drum (104) through an eccentric disk (110) to set a transmission The inner side of one end of the shaft (105) and the other end thereof extends to the outer side of the shaft ring (107) and is provided with a second bearing seat (111), the second bearing seat (111) being provided on the magnetic separation box (101), the magnetic separation box (101) being provided with two reduction motors (112), the two reduction motors (112) being respectively located on both sides of the magnetic separation box (101), and the two reduction motors (112) being respectively used for driving the magnetic separation roller (104) and the permanent magnet group (10 9), the feed chute (102) is arranged above the side of the maximum field strength position, 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 trough (113) and the magnetic separation drum (104), two unloading openings (114) are arranged on the arc-shaped magnetic separation trough (113), and the unloading openings (114) are symmetrically distributed on both sides of the arc-shaped magnetic separation trough (113), and the two unloading openings (114) are respectively a tailing opening and a medium ore opening; A high-intensity magnetic separator (200), the high-intensity magnetic separator (200) is connected to the intermediate ore port, and the high-intensity magnetic separator (200) is provided with a magnetic concentrate port and a demagnetization ore outlet; Buffer tank one (300), buffer tank one (300) is connected to the magnetic separation concentrate port; A concentration tank (400), the concentration tank (400) and the buffer tank (300) are connected to each other and are used to concentrate the slurry to a concentration controlled at 30%±5 percentage points. The concentration tank (400) is provided with a feed port (401), a concentrated slurry outlet (402) and an overflow port (403). A baffle (404) is provided in the concentration tank (400). The bottom of the baffle (404) is arranged obliquely downward toward a side close to the feed port (401), and a gap is reserved between the bottom and the inner wall of the concentration tank (400); Buffer tank 2 (500), buffer tank 2 (500) is connected to the concentration outlet of the concentration tank (400); A centrifugal concentrator (600) is connected to the second buffer tank (500) for centrifugal separation to obtain black tungsten concentrate.

2. The equipment for recovering black tungsten by combined strong magnetic separation and gravity separation of polymetallic ores according to claim 1 is characterized in that: The baffle (404) has uniformly distributed flow holes on its surface, and the flow holes are arranged horizontally.

3. The equipment for recovering black tungsten by combined strong magnetic separation and gravity separation of polymetallic ores according to claim 2 is characterized in that: The bottom of the concentration tank (400) is conical, and symmetrically distributed notches are arranged on both sides. A receiving belt (405) is installed at the notch. Both ends of the receiving belt (405) are equipped with conveying rollers (406). The conveying rollers (406) are used to drive the receiving belt (405) to convey downward along the notch. A polyurethane sealing strip (407) is arranged at the notch. A contact piece (408) is provided at the bottom of the concentration tank (400), the contact piece (408) crosses the inner side of the receiving belt (405), and a plurality of squeezing rollers are evenly distributed on the contact piece (408), and the squeezing rollers are used to contact the receiving belt (405) against the outer side of the notch without affecting the downward conveying action of the receiving belt (405); One set of conveying rollers (406) is externally connected to a driving motor (409).

4. The equipment for recovering black tungsten by combined strong magnetic separation and gravity separation of polymetallic ores according to claim 3 is characterized in that: A vibration block (410) is provided on the side of the baffle (404) facing away from the feed inlet (401).

5. The equipment for recovering black tungsten by strong magnetic separation and gravity separation of polymetallic ores according to claim 1 is characterized in that: The overflow port (403) is externally connected to a secondary concentration tank (700), and the secondary concentration tank (700) performs secondary concentration and sedimentation on the overflow slurry to obtain secondary concentrated slurry which enters the second buffer tank (500).

6. The equipment for recovering black tungsten by combined strong magnetic separation and gravity separation of polymetallic ores according to claim 1 is 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).

7. The equipment for recovering black tungsten by combined strong magnetic separation and gravity separation of polymetallic ores according to any one of claims 1 to 6, 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 matched 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.

8. The equipment for recovering black tungsten by combined strong magnetic separation and gravity separation of polymetallic ores according to claim 7 is characterized in that: The bottom surface of the lower adjustment block (1014) is provided with a groove, 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 correspondingly, the lower adjustment block (1014) is provided with a vertical groove (10141), a slider (10142) is slidably fitted in the vertical groove (10141), and the bottom of the slider (10142) is The bottom of the slide groove (1019) is arranged obliquely downward and gradually approaches the fine thread 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).

9. The equipment for recovering black tungsten by strong magnetic separation and gravity separation of polymetallic ores according to claim 8 is 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.

10. The equipment for recovering black tungsten by strong magnetic separation and gravity separation of polymetallic ores according to claim 8 is 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).

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