System for recovering tungsten from polymetallic tailings

Abstract

The invention belongs to a mineral separation technology, and particularly relates to a system for recovering tungsten from polymetallic tailings. The magnetic separation and flotation beneficiation process can solve the problem that a traditional flotation and magnetic separation beneficiation process corrodes magnetic separation equipment. According to the method, wolframite coarse ore and demagnetized tailings are obtained after magnetic separation, wolframite concentrate is obtained after the wolframite coarse ore is subjected to flotation, scheelite-fluorite concentrate is obtained after the demagnetized tailings are subjected to acid pickling blending and flotation, scheelite concentrate is obtained after the scheelite-fluorite concentrate is subjected to centrifugal reselection, and then the grade and the recovery rate of the scheelite concentrate are both improved.

Description

Technical Field

[0001] The invention belongs to ore dressing technology, in particular to a system for recovering tungsten from polymetallic tailings. Background Art

[0002] Tungsten is one of the irreplaceable basic materials for the national economy and modern national defense. It is an important strategic material and is widely used in important fields such as aerospace, machinery manufacturing, and national defense industry. Therefore, the country attaches great importance to the development and utilization of tungsten resources.

[0003] Black and white tungsten paragenetic ore is a difficult ore to be processed, which is often accompanied by calcium-rich fluorite, calcite and calcium- and magnesium-rich tremolite. These gangues have similar surface properties to scheelite. In order to suppress these gangues, a large amount of inhibitors are often needed. Common inhibitors are water glass, sodium hexametaphosphate, sodium fluorosilicate, carboxymethyl cellulose, etc. In the mixed flotation of black and white tungsten paragenetic ore, the addition of lead nitrate helps to enhance the chelating agent's ability to collect scheelite and wolframite, and reduce the amount of collector. The collectors used in the mixed flotation of black and white tungsten paragenetic ore are generally fatty acid collectors, chelating collectors and fatty acid collectors. In terms of the process flow of black and white tungsten paragenetic ore beneficiation, it is also particularly important to choose a suitable process flow, which is also the key to achieving better mineral processing technical indicators.

[0004] Most of the existing tungsten beneficiation processes use flotation-magnetic separation, such as CN113369005A, but ignore the residual reagents in the minerals after flotation, which will cause corrosion to the magnetic separation equipment. Secondly, the particle size of the minerals in the existing tungsten beneficiation process is -74μm, accounting for 80%-95% of the weight, which is easy to cause tailing problems during magnetic separation. Summary of the invention

[0005] 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:

[0006] A system for recovering tungsten from polymetallic tailings, comprising:

[0007] Magnetic separation box, in which a magnetic separation mechanism is arranged, and the field strength of the magnetic separation mechanism is 1.0-1.3 Tesla;

[0008] A concentrating tank 1, wherein a feed port 1, a concentrating port 1 and an overflow port 1 are arranged on the concentrating tank 1, the feed port 1 is connected to the unloading tank, and the bottom of the concentrating tank 1 is a conical structure;

[0009] A mixing tank is provided with an ore inlet, an ore outlet, a reagent adding pipe and a stirring mechanism, the ore inlet is connected to a concentration port, and the stirring mechanism is used for mixing the ore pulp and the reagent;

[0010] A flotation machine, wherein the flotation machine is provided with a pulp inlet, a pulp tank, and a recovery tank, wherein the pulp inlet is connected to the ore outlet, a flotation tube and a scraper assembly are provided in the pulp tank, and the scraper assembly is used to clean the flotation foam into the recovery tank;

[0011] A pickling mixing tank is provided with a feed port, a slurry outlet, an acid liquid adding pipe and a second stirring mechanism. The feed port is connected to the tailings outlet. The second stirring mechanism is used for mixing slurry and reagents.

[0012] The second flotation machine is provided with a second pulp inlet, a second pulp tank, and a second recovery tank. The second pulp inlet is connected to the pulp outlet. The second pulp tank is provided with a second flotation tube and a second scraper assembly. The second scraper assembly is used to clean the flotation foam into the second recovery tank.

[0013] The second concentrator tank is provided with a second feed port, a second concentrator port, and a second overflow port. The second feed port is connected to the second recovery tank, and the bottom of the second concentrator tank is a conical structure.

[0014] The centrifugal concentrator is connected to the concentrator port 2.

[0015] Preferably, the magnetic separation mechanism comprises a magnetic separation drum installed on a magnetic separation box and a reduction motor providing power for the magnetic separation drum, a permanent magnet group fixed in the magnetic separation box is independently arranged on the outer side of the magnetic separation drum, the permanent magnet group is an arc structure with a central angle of 135°-180° and a top height lower than the highest point of the magnetic separation drum and a bottom height greater than the lowest point of the magnetic separation drum, end covers are installed at both ends of the magnetic separation drum, the two end covers are rotatably installed on the hollow tube, both ends of the hollow tube are fixed on the magnetic separation box, one end of the hollow tube is an inlet end and the other end is an outlet end, and an ore feeding pipe, a flushing water pipe, and an ore unloading water pipe are installed inside the inlet end;

[0016] A collecting bucket is arranged inside the magnetic separation drum. The collecting bucket is a fan-shaped structure and the bottom is connected to the hollow tube. A partition plate is arranged inside the hollow tube. The partition plate is arranged below the side of the collecting bucket away from the outlet end.

[0017] One end of the flushing water pipe extends into the collecting bucket and flushes the inner wall of the magnetic separation drum in the area covered by the permanent magnetic group;

[0018] One end of the ore unloading water pipe extends into the collecting bucket and washes the inner wall of the magnetic separation drum which is away from the permanent magnetic group and below the highest point of the magnetic separation drum.

[0019] Preferably, a cleaning scraper is installed on the side of the collecting bucket away from the permanent magnet group, and the cleaning scraper is used to contact the inner wall of the magnetic separation drum.

[0020] Preferably, the end cap on the side away from the inlet end has slurry discharge circular openings evenly distributed circumferentially;

[0021] A guide plate is arranged at the bottom of the hollow tube, a certain gap is reserved between the bottom of the guide plate and the inner wall of the magnetic separation drum, and the bottom gradually extends downward from the outlet end to the inlet end.

[0022] Preferably, the first and second concentration tanks are provided with inclined baffles, and the bottom of the baffles is arranged close to the feed inlet;

[0023] A notch is arranged at the bottom of the concentration tank, a polyurethane sealing strip is installed at the notch, and a deposition conveying structure is arranged outside the notch to convey the concentrated mineral particles to the concentration port.

[0024] Preferably, the deposition conveying structure includes a motor group, a conveying roller one and a conveying roller two installed on the outer walls of the concentration tank one and the concentration tank two, the output end of the motor group is connected to the conveying roller one, a deposition belt is installed on the outer side of the conveying roller one and the conveying roller two, a clamping member is installed in the area between the conveying roller one and the conveying roller two, the clamping member runs through the interior of the deposition belt, and a clamping roller evenly distributed across the notch is arranged on the side of the clamping member opposite to the notch.

[0025] Preferably, a vibration block is arranged on the side of the baffle plate facing away from the feed inlet, and horizontally arranged flow-uniforming holes are evenly distributed on the surface of the baffle plate.

[0026] Preferably, the scraper assembly one and the scraper assembly two both include a scraper plate, a rotating shaft, and a driver. The driver is installed on the outside of the slurry tank one and the slurry tank two and is connected to the scraper plate via the corresponding rotating shaft. Two groups of scraper plates are provided, and the two groups of scraper plates are symmetrically distributed. The scraper plates both include a connecting plate and a movable plate. The connecting plate is fixedly installed on the rotating shaft, and the movable plate is slidably fitted on the outside of one end of the connecting plate away from the rotating shaft. A limit plate is provided on the movable plate, and the limit plate is used to limit the maximum extension stroke of the connecting plate relative to the movable plate. The movable plate is made of lightweight material and floats on the liquid surface inside the slurry tank.

[0027] Preferably, the first slurry tank and the second slurry tank are both arc-shaped grooves, a sliding member is slidably fitted in the arc-shaped groove, a rotating stopper is rotatably mounted on the sliding member, and a torsion spring is installed at the rotation node of the rotating stopper and the sliding member;

[0028] A rotating disk and a fixed pulley are installed in both the recovery tank 1 and the recovery tank 2. A flushing water pipe is installed on the rotating disk. Flushing nozzles are evenly distributed on the flushing water pipe. The flushing nozzles are used to flush the front and back sides of the movable plate.

[0029] A connecting rope is installed on the sliding member, and one end of the connecting rope passes around the fixed pulley and connects to the rotating disk;

[0030] Elastic limit pin 1 is installed in the slurry tank 1 and slurry tank 2 areas at the top of the arc trough;

[0031] Elastic limiting pin 2 is installed in the recovery groove 1 and the recovery groove 2 area located on the side of the rotating disk.

[0032] Preferably, the sliding member and the outer wall of the rotating disk are both provided with arc-shaped grooves;

[0033] Elastic limit pin 1 and elastic limit pin 2 both include a fixed plate, a sliding pin is installed on the fixed plate, a baffle plate and a limit plate are installed on the sliding pin, the baffle plate and the limit plate are respectively located on both sides of the fixed plate, and a spring body is arranged on the sliding pin located between the baffle plate and the fixed plate, and one end of the sliding pin relative to the arc-shaped groove is an arc-shaped structure and is adapted to the arc-shaped groove.

[0034] Compared with the prior art, the present invention has the following beneficial effects:

[0035] 1. The present invention adopts a mineral separation process of first magnetic separation and then flotation separation, which can solve the problem of corrosion of magnetic separation equipment caused by the traditional mineral separation process of first flotation separation and then magnetic separation.

[0036] 2. The present invention obtains coarse scheelite ore and demagnetized tailings after magnetic separation, the coarse scheelite ore is subjected to flotation to obtain coarse scheelite concentrate, the demagnetized tailings are subjected to acid washing, blending and flotation to obtain scheelite-fluorite concentrate, and the scheelite-fluorite concentrate is subjected to centrifugal gravity separation to obtain scheelite concentrate, thereby improving the grade and recovery rate of the scheelite concentrate.

[0037] 3. The present invention adopts a directional conveying structure to convey the slurry at the bottom of the concentration tank to the concentration port during concentration. As the concentration of the slurry increases, the slurry is easy to stick to the bottom of the concentration tank, resulting in a decrease in the subsequent mineral processing recovery rate. At the same time, since most of the existing concentration processes use sedimentation methods, the concentration operation time is long and the production cost is increased. Therefore, the use of a directional conveying structure can speed up the concentration efficiency without affecting the concentration effect.

[0038] 4. The present invention adopts an automatic cleaning scraper structure during flotation. After the scraper cleans the flotation foam, the front and back sides are rinsed and cleaned immediately, and the cleaning liquid flows into the recovery tank without entering the pulp tank, thereby eliminating the phenomenon of condensed flotation minerals on the scraper surface, ensuring the mineral grade and recovery rate. At the same time, the scraper adopts a telescopic structure and the scraper part floats on the liquid surface, which will not cause large waves on the liquid surface, reduce the problem of broken bubbles, and secondly, it can also reduce the pulp brought out when cleaning the flotation foam, and improve the grade of the recovered minerals.

[0039] 5. During magnetic separation, the present invention independently arranges the permanent magnet group on the outside of the magnetic separation drum, and the slurry can enter the magnetic separation drum from the hollow tube to complete the magnetic separation operation. The magnetic material after magnetic separation is separated from the coverage area of ​​the permanent magnet group and falls into the collecting bucket. During the magnetic separation, the magnetic material adsorbed on the magnetic separation drum is flushed by the flushing water pipe to ensure that all the minerals in the magnetic group are separated. At the same time, the flushing water flow will impact the slurry at the bottom and have a certain negative impact on the magnetic separation effect. Therefore, a drainage plate is arranged at the bottom of the hollow tube, and a certain gap is reserved between the bottom of the drainage plate and the inner wall of the magnetic separation drum, and the bottom gradually extends downward from the outlet end to the inlet end, so as to drain the water to the magnetic separation drum at the inlet end, thereby reducing the negative impact of water flow impact on magnetic separation. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a schematic diagram of the system structure of the present invention.

[0041] Figure 2 It is an axial cross-sectional view of the magnetic separation box of the present invention.

[0042] Figure 3 It is a radial cross-sectional view of the magnetic separation box of the present invention.

[0043] Figure 4 It is a diagram showing the internal structure of the concentration tank of the present invention.

[0044] Figure 5 for Figure 4 A partial schematic diagram of the notch in the middle inner wall.

[0045] Figure 6 for Figure 4 Side view of the concentrator tank.

[0046] Figure 7 It is a schematic diagram of the internal structure of the flotation machine of the present invention.

[0047] Figure 8 for Figure 7 A partial schematic diagram of the middle bubble scraper plate.

[0048] Fig. 9 for Figure 8 Partial schematic diagram of the middle arc groove.

[0049] Fig.10 for Figure 8 A partial schematic diagram of the middle rotating disk. DETAILED DESCRIPTION

[0050] 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.

[0051] 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.

[0052] like Figure 1 A system for recovering tungsten from polymetallic tailings, comprising:

[0053] A magnetic separation box 100 is provided with a magnetic separation mechanism in the magnetic separation box 100, and the field strength of the magnetic separation mechanism is 1.0-1.3 Tesla;

[0054] A concentrator 200 is provided with a feed port 201, a concentrator port 202, and an overflow port 203. The magnetically separated concentrate is connected to the feed port 201 via a pipeline. The bottom of the concentrator 200 is a conical structure.

[0055] A mixing tank 300 is provided with an ore inlet 301, an ore outlet 302, a reagent adding pipe 303 and a stirring mechanism 1. The ore inlet 301 is connected to a concentration port 202. The stirring mechanism 1 is used for mixing the ore pulp and the reagent.

[0056] A flotation machine 400 is provided with a pulp inlet 401, a pulp tank 402, and a recovery tank 403. The pulp inlet 401 is connected to the ore outlet 302. A flotation tube 404 and a scraping foam component 1 are provided in the pulp tank 402. The scraping foam component 1 is used to clean the flotation foam into the recovery tank 403.

[0057] The pickling and mixing tank 500 is provided with a feed port 501, a slurry outlet 502, a slurry outlet 503, a second reagent adding pipe 504 and a second stirring mechanism. The magnetic separation tailings are connected to the feed port 501 through a pipe, and the second stirring mechanism is used for mixing the slurry and the reagent.

[0058] The second flotation machine 600 is provided with a second pulp inlet 601, a second pulp tank 602, and a second recovery tank 603. The second pulp inlet 601 is connected to the pulp outlet 502. The second pulp tank 602 is provided with a second flotation tube 604 and a second scraper assembly. The second scraper assembly is used to clean the flotation foam into the second recovery tank 603.

[0059] The second concentrator tank 700 is provided with a second feed port 701, a second concentrator port 702, and a second overflow port 703. The second feed port 701 is connected to the second recovery tank 603. The bottom of the second concentrator tank 700 is a conical structure.

[0060] The centrifugal concentrator 800 is connected to the concentration port 2 702 .

[0061] The rough scheelite and tailings are separated by magnetic separation. The rough scheelite is concentrated to a concentration of about 30% (plus or minus 5 percentage points) in the concentration tank 200. The concentration port 202 and the concentration port 2 702 are equipped with a switch valve and a concentration sensor. The concentration sensor and the switch valve are connected to the PLC controller. The concentration sensor collects the concentration signal at the concentration port and transmits it to the PLC controller. When the concentration reaches the set threshold, the PLC controller controls the switch valve to open and discharge the concentrated slurry. The scheelite concentrate is obtained by flotation in the flotation machine 400. The scheelite tailings enter the pickling and mixing tank 500 and are mixed to a concentration of 30%. 4kg / t of oxalic acid is added and stirred, and then the reagent is added. Under acidic conditions, oxalic acid can react more effectively with the metal ions on the surface of fluorite to form a stable complex. It helps to enhance the hydrophobicity of fluorite particles, making it easier to be captured by the flotation agent and float to the surface of the slurry. The flotation effect of fluorite is enhanced, while the interference with the flotation of scheelite is minimized. After blending, the scheelite-fluorite concentrate is obtained by flotation in a flotation machine 600, and then concentrated to a concentration of 30% in a concentration tank 700, and then obtained by a centrifugal concentrator 800 to obtain scheelite concentrate.

[0062] In the above-mentioned embodiment, if Figure 2 and Figure 3 As shown, the magnetic separation mechanism includes a magnetic separation drum 101 installed on a magnetic separation box 100 and a reduction motor 102 for providing power to the magnetic separation drum 101. A permanent magnet group 103 fixed in the magnetic separation box 100 is independently arranged on the outer side of the magnetic separation drum 101. The permanent magnet group 103 is an arc structure with a central angle of 135°-180° and a top height lower than the highest point of the magnetic separation drum 101 and a bottom height greater than the lowest point of the magnetic separation drum 101. End covers 104 are installed at both ends of the magnetic separation drum 101. The two end covers 104 are rotatably installed on a hollow tube 105. Both ends of the hollow tube 105 are fixed on the magnetic separation box 100. One end of the hollow tube 105 is an inlet end and the other end is an outlet end. A feed pipe 107, a flushing water pipe 108, and an unloading water pipe 109 are installed inside the inlet end.

[0063] A collecting bucket 106 is provided inside the magnetic separation drum 101. The collecting bucket 106 is a fan-shaped structure and the bottom is connected to the hollow tube 105. A partition plate 110 is provided inside the hollow tube 105. The partition plate 110 is arranged below the side of the collecting bucket 106 away from the outlet end.

[0064] One end of the flushing water pipe 108 extends into the collecting bucket 106 and flushes the inner wall of the magnetic separation drum 101 in the area covered by the permanent magnetic group 103;

[0065] One end of the unloading water pipe 109 extends into the collecting bucket 106 and washes the inner wall of the magnetic separation drum 101 which is away from the permanent magnet group 103 and is lower than the highest point of the magnetic separation drum 101 .

[0066] A cleaning scraper is installed on the side of the collecting bucket 106 away from the permanent magnet group 103 , and the cleaning scraper is used to contact the inner wall of the magnetic separation drum 101 .

[0067] The end cover 104 on the side away from the inlet end has slurry discharge circular openings evenly distributed in the circumferential direction;

[0068] A guide plate 111 is provided at the bottom of the hollow tube 105 . A certain gap is reserved between the bottom of the guide plate 111 and the inner wall of the magnetic separation drum 101 , and the bottom gradually extends downward from the outlet end to the inlet end.

[0069] The feed pipe 107 feeds the slurry into the bottom of the magnetic separation drum 101. The magnetic separation drum 101 absorbs the magnetic material in the slurry during the rotation process, and the remaining tailings flow to the outlet end. Since the permanent magnet group 103 absorbs the magnetic material on the inner wall of the magnetic separation drum 101, it will be mixed with non-magnetic minerals. Therefore, the internal non-magnetic minerals will be dispersed and agglomerated through the flushing water pipe 108 to fall off. When the magnetic minerals lose the magnetic field, they will fall off and fall into the collection bucket 106, and then be discharged through the hollow pipe 105. The flushing water flow will cause channeling disturbance to the bottom slurry. The particle size of the mineral particles is generally around -74 microns, which affects the effect of the magnetic separation operation. Therefore, a diversion plate 111 is set to divert the flushing water flow to the inlet end.

[0070] In the above-mentioned embodiment, if Figure 4 and Figure 5 , Figure 6 As shown, the concentration tank 1 200 and the concentration tank 2 700 are provided with an inclined baffle 204, and the bottom of the baffle 204 is arranged close to the feed port;

[0071] A notch is provided at the bottom of the concentration tank 1 200 and the concentration tank 2 700, and a polyurethane sealing strip 205 is installed at the notch. The polyurethane sealing strip 205 at the bottom cleans the surface of the deposition belt 209, and a deposition conveying structure is provided outside the notch to convey the concentrated mineral particles to the concentration port.

[0072] The deposition and conveying structure includes a motor group 206, a conveying roller 1 207 and a conveying roller 2 208 installed on the outer walls of the concentration tank 1 200 and the concentration tank 2 700. The output end of the motor group 206 is connected to the conveying roller 1 207. A deposition belt 209 is installed on the outer side of the conveying roller 1 207 and the conveying roller 208. A clamping member 210 is installed in the area between the conveying roller 1 207 and the conveying roller 208. The clamping member 210 runs through the interior of the deposition belt 209. The side of the clamping member 210 opposite to the notch is provided with clamping rollers 211 evenly distributed across the notch.

[0073] A vibration block 212 is disposed on the side of the baffle 204 facing away from the feed port 1 201 , and horizontally arranged flow-uniforming holes are evenly distributed on the surface of the baffle 204 .

[0074] The deposition belt 209 is attached to the outside of the notch through the pressing member 210 and the pressing roller 211 without affecting the operation of the deposition belt 209. The deposition belt 209 is made of anti-stick and wear-resistant materials and will not have over-wear problems in the short term. Secondly, the polyurethane sealing strip 205 will seal the deposition belt 209 to prevent leakage. The deposition belt 209 will transport the slurry particles downward at a speed of 10-20 mm / min, which will not affect the sedimentation and concentration of the slurry particles.

[0075] In the above-mentioned embodiment, if Figures 7 to 10 As shown, the scraping bubble component 1 and the scraping bubble component 2 both include a scraping bubble plate 404, a rotating shaft 405, and a driver 406. The driver 406 is installed on the outside of the slurry tank 1 402 and the slurry tank 2 602 and is connected to the scraping bubble plate 404 via the corresponding rotating shaft 405. The scraping bubble plate 404 is provided with two groups, and the two groups of scraping bubble plates 404 are symmetrically distributed. The scraping bubble plates 404 both include a connecting plate 4041 and a movable plate 4042. The connecting plate 4041 is fixedly installed on the rotating shaft 405, and the movable plate 404 042 is slidably fitted on the outer side of one end of the connecting plate 4041 away from the rotating shaft 405, and a limit plate 4043 is arranged on the movable plate 4042, and the limit plate 4043 is used to limit the maximum extension stroke of the connecting plate 4041 relative to the movable plate 4042, and baffles are arranged on both sides of the limit plate 4043, and the side of the baffle away from the limit plate 4043 gradually moves away from the movable plate 4042, and is used to return the cleaning liquid to the recovery tank, and the movable plate 4042 is made of lightweight material and floats on the liquid surface inside the slurry tank.

[0076] The slurry tank 1 402 and the slurry tank 2 602 are both provided with an arc groove 4021, a sliding member 4022 is slidably fitted in the arc groove 4021, a rotating stopper 4023 is rotatably mounted on the sliding member 4022, and a torsion spring is installed at the rotation node of the rotating stopper 4023 and the sliding member 4022;

[0077] A rotating disk 4031 and a fixed pulley 4032 are installed in both the recycling tank 1 403 and the recycling tank 2 603. A flushing pipe 4033 is installed on the rotating disk 4031. Flushing nozzles are evenly distributed on the flushing pipe 4033. The flushing nozzles are used to flush the front and back sides of the movable plate 4042.

[0078] A connecting rope 4034 is installed on the sliding member 4022, and one end of the connecting rope 4034 passes through the fixed pulley 4032 and connects to the rotating disk 4031;

[0079] An elastic limiting pin 407 is installed in the slurry tank 1 402 and the slurry tank 2 602 area at the top of the arc-shaped tank 4021;

[0080] Elastic limiting pin 2 408 is installed in the recovery slot 1 403 and the recovery slot 2 603 area located on the side of the rotating disk 4031.

[0081] The outer walls of the sliding member 4022 and the rotating disk 4031 are both provided with arc-shaped grooves;

[0082] The elastic limit pin 1 407 and the elastic limit pin 2 408 both include a fixed plate 4071, a sliding pin 4072 is installed on the fixed plate 4071, a blocking piece 4073 and a limiting piece 4074 are installed on the sliding pin 4072, the blocking piece 4073 and the limiting piece 4074 are respectively located on both sides of the fixed plate 4071, and a spring body 4075 is arranged on the sliding pin 4072 located between the blocking piece 4073 and the fixed plate 4071, and one end of the sliding pin 4072 opposite to the arc-shaped groove is an arc-shaped structure and is adapted to the arc-shaped groove.

[0083] The driver 406 drives the rotating shaft 405 to move the bubble scraper 404 to clean and transport the flotation foam to the recovery tank. When the movable plate 4042 floats on the surface of the slurry tank, it cleans the flotation foam. After the cleaning is completed, the flushing nozzle on the flushing pipe 4033 flushes the front of the movable plate 4042. When the movable plate 4042 contacts the flushing nozzle, the flushing pipe 4033 drives the rotating disk 4031 to rotate. At the same time, the elastic limit pin 1 407 releases the restriction on the sliding member 4022 until the rotating disk 4031 is locked and fixed under the restriction of the elastic limit pin 2 408. The movable plate 4042 will slightly deform the flushing pipe or flushing pipe. As the rotation proceeds, the movable plate 4042 will partially retract the connecting plate 4041 into the interior under the action of gravity, and when the recovered movable plate 4042 passes through the arc groove 4021, it will act on the rotating stopper 4023 to move the sliding body 4022 along the arc groove 4021, and at the same time, the elastic limit pin 2 408 releases the restriction on the rotating disk 4031 until the elastic limit pin 1 407 locks the sliding body 4022 again and the flushing nozzle is reset. The movable plate 4022 will deflect the rotating stopper 4023 relative to the sliding body 4022, and the movable plate 4022 will be reset by the torsion spring through the rear rotating stopper 4023.

[0084] 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 system for recovering tungsten from polymetallic tailings, characterized in that: include: A magnetic separation box (100), wherein a magnetic separation mechanism is arranged in the magnetic separation box (100), and the field strength of the magnetic separation mechanism is 1.0-1.3 Tesla; A concentrator tank (200) is provided with a feed port (201), a concentrator port (202), and an overflow port (203). The magnetically separated concentrate is connected to the feed port (201) via a pipeline. The bottom of the concentrator tank (200) is a conical structure. A mixing tank (300) is provided with an ore inlet (301), an ore outlet (302), a reagent adding pipe (303) and a stirring mechanism (1), the ore inlet (301) and a concentration port (202) are connected, and the stirring mechanism (1) is used for mixing the ore pulp and the reagent; A flotation machine (400), wherein the flotation machine (400) is provided with a pulp inlet (401), a pulp tank (402), and a recovery tank (403), wherein the pulp inlet (401) is connected to the ore outlet (302), and the pulp tank (402) is provided with a flotation tube (404) and a scraper assembly (404), and the scraper assembly (404) is used to clean the flotation foam into the recovery tank (403); The pickling and mixing tank (500) is provided with a feed port (501), a slurry outlet (502), an oxalic acid addition pipe (503), a second reagent addition pipe (504) and a second stirring mechanism. The magnetically separated tailings are connected to the feed port (501) via a pipe, and the second stirring mechanism is used for mixing the slurry and the reagent. A second flotation machine (600), wherein the second flotation machine (600) is provided with a second pulp inlet (601), a second pulp tank (602), and a second recovery tank (603); the second pulp inlet (601) is connected to the pulp outlet (502); a second flotation tube (604) and a second scraper assembly are provided in the second pulp tank (602); the second scraper assembly is used to clean the flotation foam into the second recovery tank (603); The second concentrator tank (700) is provided with a second feed port (701), a second concentrator port (702), and a second overflow port (703). The second feed port (701) is connected to the second recovery tank (603). The bottom of the second concentrator tank (700) is a conical structure. The centrifugal concentrator (800) is connected to the second concentrator port (702).

2. A system for recovering tungsten from polymetallic tailings according to claim 1, characterized in that: The magnetic separation mechanism comprises a magnetic separation drum (101) mounted on a magnetic separation box (100) and a reduction motor (102) providing power to the magnetic separation drum (101); a permanent magnet group (103) fixed in the magnetic separation box (100) is independently arranged on the outer side of the magnetic separation drum (101); the permanent magnet group (103) is an arc-shaped structure with a central angle of 135°-180°, and the top height is lower than the highest point of the magnetic separation drum (101) and the bottom height is The magnetic separation drum (101) has a height greater than the lowest point of the magnetic separation drum (101), end covers (104) are installed at both ends of the magnetic separation drum (101), and the two end covers (104) are rotatably installed on the hollow tube (105), and the two ends of the hollow tube (105) are fixed on the magnetic separation box (100), one end of the hollow tube (105) is an inlet end, and the other end is an outlet end, and an ore feeding pipe (107), a flushing water pipe (108), and an ore unloading water pipe (109) are installed inside the inlet end; A collecting bucket (106) is arranged inside the magnetic separation drum (101); the collecting bucket (106) is a fan-shaped structure and the bottom is connected to the hollow tube (105); a partition plate (110) is arranged inside the hollow tube (105); the partition plate (110) is arranged below the side of the collecting bucket (106) away from the outlet end; One end of the flushing water pipe (108) extends into the collecting bucket (106) and performs a flushing operation on the inner wall of the magnetic separation drum (101) in the area covered by the permanent magnetic group (103); One end of the ore unloading water pipe (109) extends into the collecting bucket (106) and performs a flushing operation on the inner wall of the magnetic separation drum (101) which is away from the permanent magnet group (103) and below the highest point of the magnetic separation drum (101).

3. A system for recovering tungsten from polymetallic tailings according to claim 2, characterized in that: A cleaning scraper is installed on the side of the collecting bucket (106) away from the permanent magnet group (103), and the cleaning scraper is used to contact the inner wall of the magnetic separation drum (101).

4. A system for recovering tungsten from polymetallic tailings according to claim 3, characterized in that: The end cover (104) at the side away from the inlet end is provided with slurry discharge circular openings evenly distributed in the circumferential direction; A guide plate (111) is provided at the bottom of the hollow tube (105), a certain gap is reserved between the bottom of the guide plate (111) and the inner wall of the magnetic separation drum (101), and the bottom gradually extends downward from the outlet end to the inlet end.

5. A system for recovering tungsten from polymetallic tailings according to claim 1, characterized in that: The first concentration tank (200) and the second concentration tank (700) are provided with an inclined baffle (204), and the bottom of the baffle (204) is arranged close to the feed inlet; The bottoms of the first concentration tank (200) and the second concentration tank (700) are provided with notches, polyurethane sealing strips (205) are installed at the notches, and a deposition and conveying structure is arranged outside the notches for conveying concentrated mineral particles to the concentration port.

6. A system for recovering tungsten from polymetallic tailings according to claim 5, characterized in that: The deposition and conveying structure comprises a motor group (206), a conveying roller one (207) and a conveying roller two (208) installed on the outer wall of the concentration tank one (200) and the concentration tank two (700); the output end of the motor group (206) is connected to the conveying roller one (207); a deposition belt (209) is installed outside the conveying roller one (207) and the conveying roller two (208); a clamping member (210) is installed in the area between the conveying roller one (207) and the conveying roller two (208); the clamping member (210) runs through the interior of the deposition belt (209); and a clamping roller (211) evenly distributed across the notch is arranged on the side of the clamping member (210) opposite to the notch.

7. A system for recovering tungsten from polymetallic tailings according to claim 6, characterized in that: A vibration block (212) is arranged on the side of the baffle (204) facing away from the feed inlet (201), and horizontally arranged flow-uniforming holes are evenly distributed on the surface of the baffle (204).

8. A system for recovering tungsten from polymetallic tailings according to claim 4 or 5, characterized in that: The first and second scraping foam components both include a scraping foam plate (404), a rotating shaft (405), and a driver (406). The driver (406) is installed on the outside of the first slurry tank (402) and the second slurry tank (602) and is connected to the scraping foam plate (404) via the corresponding rotating shaft (405). The scraping foam plates (404) are provided in two groups, and the two groups of scraping foam plates (404) are symmetrically distributed. The scraping foam plates (404) both include a connecting plate (4041) and a movable plate (4042). 42), the connecting plate (4041) is fixedly mounted on the rotating shaft (405), the movable plate (4042) is slidably fitted on the outer side of one end of the connecting plate (4041) away from the rotating shaft (405), a limit plate (4043) is arranged on the movable plate (4042), the limit plate (4043) is used to limit the maximum extension stroke of the connecting plate (4041) relative to the movable plate (4042), and the movable plate (4042) is made of a lightweight material and floats on the liquid surface inside the slurry tank.

9. A system for recovering tungsten from polymetallic tailings according to claim 8, characterized in that: The slurry tank 1 (402) and the slurry tank 2 (602) are both provided with an arc groove (4021), a sliding member (4022) is slidably matched in the arc groove (4021), a rotating block (4023) is rotatably mounted on the sliding member (4022), and a torsion spring is installed at the rotation node of the rotating block (4023) and the sliding member (4022); A rotating disk (4031) and a fixed pulley (4032) are installed in both the recovery tank 1 (403) and the recovery tank 2 (603). A flushing pipe (4033) is installed on the rotating disk (4031). Flushing nozzles are evenly distributed on the flushing pipe (4033). The flushing nozzles are used to flush the front and back sides of the movable plate (4042). A connecting rope (4034) is installed on the sliding member (4022), and one end of the connecting rope (4034) passes around the fixed pulley (4032) and is connected to the rotating disk (4031); An elastic limiting pin 1 (407) is installed in the slurry tank 1 (402) and slurry tank 2 (602) regions located at the top of the arc-shaped tank (4021); Elastic limiting pin 2 (408) is installed in the recovery groove 1 (403) and recovery groove 2 (603) areas located on the side of the rotating disk (4031).

10. A system for recovering tungsten from polymetallic tailings according to claim 9, characterized in that: The sliding member (4022) and the outer wall of the rotating disk (4031) are both provided with arc-shaped grooves; The elastic limiting pin 1 (407) and the elastic limiting pin 2 (408) both comprise a fixed plate (4071), a sliding pin (4072) being mounted on the fixed plate (4071), a blocking piece (4073) and a limiting piece (4074) being mounted on the sliding pin (4072), the blocking piece (4073) and the limiting piece (4074) being respectively located on two sides of the fixed plate (4071), and a spring body (4075) being arranged on the sliding pin (4072) located between the blocking piece (4073) and the fixed plate (4071), and one end of the sliding pin (4072) opposite to the arc-shaped groove is an arc-shaped structure and is adapted to the arc-shaped groove.

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