Method and system for recovering barite from lead-zinc tailings

Abstract

The invention provides a method for recovering barite from lead-zinc tailings, which comprises the following steps: a pretreatment stage: controlling a ball mill to grind the lead-zinc tailings until the fineness of the lead-zinc tailings reaches 0.074 mm and accounts for 72-75%, controlling the ore pulp concentration of the lead-zinc tailings to be 41-45%, adding zinc sulfate into a pouring gate of the ball mill, and uniformly stirring; the addition amount is 1950-2050 g / ton, and a roughing stage and a concentration stage are adopted. According to the method for recovering the barite from the lead-zinc tailings, the recovery efficiency is improved, specifically, the recovery efficiency of the barite is effectively improved through the activation effect of zinc sulfate, the collecting effect of xanthate, the foaming effect of second oil and the inhibiting effect of glass water; and lead and copper are separated through heating and screening, and repeated roughing and scavenging operations are performed, so that the recycling precision of barite is improved.

Description

Technical Field

[0001] The present invention relates to the field of mineral processing, and in particular to a method and system for recovering barite from lead-zinc tailings. Background Art

[0002] In the process of mineral resource development and utilization, lead-zinc tailings, as a common industrial solid waste, not only occupy a large amount of land resources, but also may cause environmental pollution. However, lead-zinc tailings often contain a variety of valuable components, and barite is one of the minerals with important recycling value.

[0003] Currently, there are many deficiencies in the methods for recovering barite from lead-zinc tailings. On the one hand, the barite recovery accuracy is low, making it difficult to achieve effective separation and extraction of barite. On the other hand, the recovery efficiency is low, resulting in reduced work efficiency and increased production costs. In addition, when processing lead-zinc tailings containing high levels of dolomite and pyrite, the existing recovery methods make barite recovery more difficult because the flotation properties of dolomite and barite are extremely similar.

[0004] Therefore, it is necessary to provide a method for recovering barite from lead-zinc tailings to solve the above technical problems. Summary of the Invention

[0005] The present invention provides a method for recovering barite from lead-zinc tailings, which solves the problem that when the existing recovery method processes lead-zinc tailings containing relatively high levels of dolomite and pyrite, the recovery of barite is more difficult due to the extremely similar flotation properties of dolomite and barite.

[0006] In order to solve the above technical problems, the present invention provides a method for recovering barite from lead-zinc tailings, comprising the following steps:

[0007] S1, pretreatment stage: control the ball mill to grind the lead-zinc tailings to a fineness of 0.074mm, accounting for 72-75%, and control the slurry concentration of the lead-zinc tailings at 41%-45%. Add zinc sulfate at the pouring port of the ball mill in an amount of 1950-2050 g / ton;

[0008] S2, roughing stage: the ground lead-zinc tailings are heated at 60°C, screened to separate lead and copper, and 95-105 g / ton of xanthate, 295-305 g / ton of copper sulfate, and 25-35 g / ton of No. 2 oil are added while stirring to perform roughing operation to obtain zinc concentrate;

[0009] S3, concentrating stage: adding 4900-5100 g / ton of glass water and 290-310 g / ton of oleic acid, stirring at the same time, performing concentrating operation, adding 140-170 g / ton of sodium dodecyl sulfate for roughing to obtain barite rough concentrate and barite roughing tailings, adding 30-60 g / ton of sodium dodecyl sulfate to the barite roughing tailings for two scavenging to obtain flotation tailings, adding 1500-2000 g / ton, 1000-1300 g / ton, 500-700 g / ton, 500-700 g / ton and 500-700 g / ton of glass water in sequence, stirring after each addition, and finally obtaining barite.

[0010] Preferably, in the pretreatment stage of the S1, the contact area between the lead-zinc tailings and zinc sulfate is increased by a grinding operation, and zinc sulfate is used as an activator to improve the recovery efficiency of barite. In the roughing stage of the S2, xanthate is used as a collector and No. 2 oil is used as a frother, and the two cooperate to separate lead and copper in the lead-zinc tailings, thereby improving the efficiency of subsequent barite recovery. In the concentrating stage of the S3, glass water is used as an inhibitor to improve the recovery efficiency of barite.

[0011] Preferably, a screening device is used when screening the lead-zinc tailings in S2, and the screening device includes a mounting frame, a vibrator, a screen, two sliding components, a through slot, a bracket and two collecting boxes, the vibrator is installed on the top of the mounting frame, the screen is arranged inside the mounting frame, the two sliding components are respectively arranged on both sides of the inner wall of the mounting frame, the sliding component includes a slide groove and a slider, the slide groove is opened on the inner wall of the mounting frame, the slider is slidably connected to the inside of the slide groove and connected to the screen, the bracket is installed at the bottom of the mounting frame, the two collection boxes are both arranged inside the bracket, and the through slot is opened at the bottom of the inner wall of the mounting frame.

[0012] Preferably, inclined plates are installed on both sides of the inner wall of the mounting frame and above the screen, support frames are connected on both sides of the inside of the mounting frame and below the screen, guide plates are connected on both sides of the inner wall of the mounting frame and below the two support frames, a support plate is installed at the bottom of the bracket, and a handle is installed on one side of the collection box.

[0013] A system for efficiently recovering barite from lead-zinc tailings, comprising: a grinding and activation unit, including an intelligent ball mill, a zinc sulfate quantitative addition system, and a slurry concentration control module, for achieving precise grinding of the lead-zinc tailings, quantitative activation of zinc sulfate, and slurry concentration control;

[0014] Heating and screening unit, including gradient heating tank, high-frequency vibrating screen and lead-copper separation and collection device, is used to achieve constant temperature treatment of slurry and separation of lead and copper minerals;

[0015] Roughing unit, including a multi-trough rougher and a reagent co-addition system, for efficient roughing of zinc concentrate;

[0016] The selection unit includes an intelligent selection system, a sodium dodecyl sulfate processing module and a barite collection and purification system, which are used to achieve deep selection of barite and product purification.

[0017] Preferably, the intelligent ball mill is equipped with a built-in laser particle size analyzer, which is linked with a PLC control system to realize automatic particle size adjustment.

[0018] Preferably, the gradient heating tank adopts a three-layer jacket structure and is equipped with a temperature sensor to achieve constant temperature control.

[0019] Preferably, the five-stage selection tank of the selection unit is equipped with a DCS distributed control system, which can realize the segmented and precise addition of glass water.

[0020] Preferably, it also includes a central control system, which includes a BP neural network prediction model and a genetic algorithm optimization module to achieve intelligent operation of the system.

[0021] Preferably, the reagent collaborative addition system is used to add xanthate, copper sulfate and No. 2 oil, the sodium dodecyl sulfate processing module is used to add sodium dodecyl sulfate, and the barite collection and purification system is used to collect and purify barite.

[0022] Compared with the related art, the method for recovering barite from lead-zinc tailings provided by the present invention has the following beneficial effects:

[0023] The present invention provides a method for recovering barite from lead-zinc tailings, which improves the recovery efficiency: through the activation effect of zinc sulfate, the collection effect of xanthate, the foaming effect of No. 2 oil and the inhibition effect of glass water, the recovery efficiency of barite is effectively improved;

[0024] Improved recovery accuracy: The recovery accuracy of barite is improved through heat screening to separate lead and copper, as well as multiple roughing and sweeping operations;

[0025] Strong adaptability: This method can effectively treat lead-zinc tailings containing high levels of dolomite and pyrite, solving the problem of difficulty in treating such tailings in existing technologies;

[0026] Environmental protection and energy saving: No other chemicals need to be added during the heating screening process, which reduces environmental pollution and reduces production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A schematic structural diagram of a first embodiment of a method for recovering barite from lead-zinc tailings provided by the present invention;

[0028] Figure 2 A schematic structural diagram of a second embodiment of a method for recovering barite from lead-zinc tailings provided by the present invention;

[0029] Figure 3 A schematic diagram of the three-dimensional structure of the screening device from a first perspective;

[0030] Figure 4 for Figure 3 An enlarged schematic diagram of part A is shown;

[0031] Figure 5 A schematic diagram of the three-dimensional structure of the screening device from a second viewing angle;

[0032] Figure 6 It is a schematic diagram of the three-dimensional structure of the bottom of the screening device;

[0033] Figure 7 The present invention provides a schematic structural diagram of a preferred embodiment of a system for recovering barite from lead-zinc tailings.

[0034] Numbers in the figure: 1. Mounting frame; 2. Vibrating machine; 3. Screen; 4. Sliding assembly; 41. Slide groove; 42. Slider; 5. Support frame; 6. Inclined plate; 7. Guide plate; 8. Collection box; 9. Handle; 10. Bracket; 11. Support plate; 12. Through groove. DETAILED DESCRIPTION

[0035] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0036] First embodiment

[0037] Please refer to Figure 1 ,in, Figure 1 A schematic structural diagram of a first embodiment of a method for recovering barite from lead-zinc tailings provided by the present invention. A method for recovering barite from lead-zinc tailings comprises the following steps:

[0038] S1, pretreatment stage: control the ball mill to grind the lead-zinc tailings to a fineness of 0.074mm, accounting for 72-75%, and control the slurry concentration of the lead-zinc tailings at 41%-45%. Add zinc sulfate at the pouring port of the ball mill in an amount of 1950-2050 g / ton;

[0039] S2, roughing stage: the ground lead-zinc tailings are heated at 60°C, screened to separate lead and copper, and 95-105 g / ton of xanthate, 295-305 g / ton of copper sulfate, and 25-35 g / ton of No. 2 oil are added while stirring to perform roughing operation to obtain zinc concentrate;

[0040] S3, concentrating stage: adding 4900-5100 g / ton of glass water and 290-310 g / ton of oleic acid, stirring at the same time, performing concentrating operation, adding 140-170 g / ton of sodium dodecyl sulfate for roughing to obtain barite rough concentrate and barite roughing tailings, adding 30-60 g / ton of sodium dodecyl sulfate to the barite roughing tailings for two scavenging to obtain flotation tailings, adding 1500-2000 g / ton, 1000-1300 g / ton, 500-700 g / ton, 500-700 g / ton and 500-700 g / ton of glass water in sequence, stirring after each addition, and finally obtaining barite.

[0041] In the pretreatment stage of S1, the contact area between the lead-zinc tailings and zinc sulfate is increased by grinding, and zinc sulfate serves as an activator to improve the recovery efficiency of barite.

[0042] In the roughing stage of S2, xanthate is used as a collector and No. 2 oil is used as a foaming agent, and the two cooperate to separate lead and copper in the lead-zinc tailings, thereby improving the efficiency of subsequent barite recovery.

[0043] In the S3 concentration stage, glass water is used as an inhibitor to improve the recovery efficiency of barite.

[0044] Second embodiment

[0045] Please refer to Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 and Figure 6 Based on the method for recovering barite from lead-zinc tailings provided in the first embodiment of this application, the second embodiment of this application provides another method for recovering barite from lead-zinc tailings. The second embodiment is merely a preferred embodiment of the first embodiment, and the implementation of the second embodiment will not affect the implementation of the first embodiment alone.

[0046] Specifically, the difference between the method for recovering barite from lead-zinc tailings provided in the second embodiment of the present application is that a screening device is used for screening the lead-zinc tailings in S2, and the screening device includes a mounting frame 1, a vibrator 2, a screen 3, two sliding assemblies 4, a through groove 12, a bracket 10 and two collecting boxes 8, the vibrator 2 is installed on the top of the mounting frame 1, the screen 3 is arranged inside the mounting frame 1, and the two sliding assemblies 4 are respectively arranged on both sides of the inner wall of the mounting frame 1, the sliding assembly 4 includes a slide 41 and a slider 42, the slide 41 is opened on the inner wall of the mounting frame 1, the slider 42 is slidably connected to the inside of the slide 41 and connected to the screen 3, the bracket 10 is installed at the bottom of the mounting frame 1, the two collection boxes 8 are both arranged inside the bracket 10, and the through groove 12 is opened at the bottom of the inner wall of the mounting frame 1.

[0047] Inclined plates 6 are installed on both sides of the inner wall of the mounting frame 1 and above the screen 3, support frames 5 are connected on both sides of the interior of the mounting frame 1 and below the screen 3, guide plates 7 are connected on both sides of the inner wall of the mounting frame 1 and below the two support frames 5, a support plate 11 is installed at the bottom of the bracket 10, and a handle 9 is installed on one side of the collection box 8.

[0048] The use of the inclined plate 6 can prevent the raw materials from falling into the inside of the chute 41, the support frame 5 can support the screen 3, and the guide plate 7 can make the raw materials screened by the screen 3 fall into the inside of the collection box 8 through the through groove 12. When cleaning the raw materials inside the collection box 8, the collection box 8 can be pulled outward by the handle 9 to the outside of the mounting frame 1 for cleaning.

[0049] The working principle of the method for recovering barite from lead-zinc tailings provided by the present invention is as follows:

[0050] During use, after placing the raw materials on the surface of the screen 2 , the vibrator 3 is started to screen the raw materials on the surface of the screen 2 , and the screened raw materials flow through the through slot 12 to the inside of the collecting box 8 .

[0051] When cleaning the screen 3, first pull the screen 3 outward. When the screen 3 moves outward, it drives the moving blocks 42 on both sides to move inside the two moving grooves 41 until the screen 3 moves to the outside of the mounting frame 1, and then the surface of the screen 3 can be cleaned.

[0052] Compared with the related art, the method for recovering barite from lead-zinc tailings provided by the present invention has the following beneficial effects:

[0053] The present invention provides a method for recovering barite from lead-zinc tailings. A chute 41 and a slider 42 are provided on both sides of the inner wall of the mounting frame 1 for use with the screen 3, so as to facilitate the screen 3 being pulled to the outside of the mounting frame 1 for residue cleaning.

[0054] Please refer to Figure 7 ,in, Figure 7 A schematic structural diagram of a preferred embodiment of a system for recovering barite from lead-zinc tailings provided by the present invention. A system for efficiently recovering barite from lead-zinc tailings, such as the method for recovering barite from lead-zinc tailings, comprises: a grinding and activation unit, comprising an intelligent ball mill, a zinc sulfate quantitative addition system, and a slurry concentration control module, for achieving precise grinding of the lead-zinc tailings, quantitative activation of zinc sulfate, and slurry concentration control;

[0055] Heating and screening unit, including gradient heating tank, high-frequency vibrating screen and lead-copper separation and collection device, is used to achieve constant temperature treatment of slurry and separation of lead and copper minerals;

[0056] Roughing unit, including a multi-trough rougher and a reagent co-addition system, for efficient roughing of zinc concentrate;

[0057] The selection unit includes an intelligent selection system, a sodium dodecyl sulfate processing module and a barite collection and purification system, which are used to achieve deep selection of barite and product purification.

[0058] The intelligent ball mill has a built-in laser particle size analyzer, which is linked with the PLC control system to realize automatic particle size adjustment.

[0059] Intelligent ball mill: adopts variable frequency speed regulation technology, equipped with wear-resistant ceramic lining, built-in laser particle size analyzer, and automatically adjusts the feed rate and grinding time through PLC to ensure that the particle size is stable within the specified range.

[0060] Zinc sulfate quantitative addition system: adopts screw metering pump, automatically adds zinc sulfate at a ratio of 1950-2050g / ton according to the processing capacity of the ball mill, and is equipped with an ultrasonic mixer to enhance the activation reaction between zinc sulfate and slurry.

[0061] Slurry concentration control module: Integrates electromagnetic flowmeter and concentration meter, and adjusts water replenishment in real time through double closed-loop control to stably control slurry concentration.

[0062] Workflow: Lead-zinc tailings are fed into the ball mill by the feeder. The laser particle size analyzer provides real-time feedback of particle size data. The PLC adjusts the ball mill speed and grinding time based on the data. At the same time, the zinc sulfate addition system is started. The slurry concentration control module dynamically adjusts the water replenishment amount to ensure that the optimal processing concentration is achieved.

[0063] The gradient heating tank adopts a three-layer jacket structure and is equipped with a temperature sensor to achieve constant temperature control.

[0064] The five-stage selection tank of the selection unit is equipped with a DCS distributed control system, which can realize the segmented and precise addition of glass water.

[0065] Gradient heating tank: adopts three-layer jacket structure and is equipped with temperature sensor.

[0066] High-frequency vibrating screen: uses polyurethane screen, vibration frequency 20-50Hz adjustable, equipped with automatic cleaning device to prevent clogging of the screen holes.

[0067] Lead-copper separation and collection device: A three-level overflow tank is set up to achieve efficient separation of lead and copper minerals through density difference, and a weighing sensor is equipped to record the separation amount in real time.

[0068] Working process: The ground slurry enters the gradient heating tank and is kept at a constant temperature for a specified time. The heated slurry is then transported to the high-frequency vibrating screen to achieve preliminary separation of lead-copper minerals and tailings. The separated lead-copper minerals are measured by a collection device and discharged from the system.

[0069] It also includes a central control system, which includes a BP neural network prediction model and a genetic algorithm optimization module to achieve intelligent operation of the system.

[0070] The reagent collaborative addition system is used for adding xanthate, copper sulfate and No. 2 oil, the sodium dodecyl sulfate processing module is used for adding sodium dodecyl sulfate, and the barite collection and purification system is used for collecting and purifying barite.

[0071] Oleic acid emulsification addition system: ultrasonic emulsifier + peristaltic pump.

[0072] Sodium dodecyl sulfate treatment module:

[0073] Roughing agent tank + variable frequency agitator, two-stage sweeping agent tank + PLC timing control, high-efficiency flotation device.

[0074] Barite collection and purification system:

[0075] High-frequency dehydration screen, microwave drying kiln, X-ray fluorescence analyzer.

[0076] Workflow: Roughing tailings enter the concentrating tank, glass water and oleic acid are added according to the set dosage, and the tanks are gradient-selected in turn. The stirring speed of each tank and the amount of reagent added are dynamically adjusted by the DCS system. The slurry after selection enters the sodium dodecyl sulfate treatment module, and the roughing is first performed to obtain the coarse concentrate, and then the tailings are scavenged twice. The coarse concentrate is dehydrated, dried, and tested to obtain the finished barite. The scavenged tailings are discharged from the system.

[0077] Multi-tank rougher: It adopts a 4-tank series structure, equipped with a variable frequency agitator, and a stirring paddle with a hyperbolic design to ensure that the reagent and the slurry are fully mixed.

[0078] Pharmaceutical synergistic addition system:

[0079] Xanthate storage tank + plunger metering pump;

[0080] Copper sulfate dissolution tank + diaphragm pump;

[0081] No. 2 oil-pneumatic diaphragm pump:

[0082] The integrated control panel can preset the addition procedures of 95-105g / ton xanthate, 295-305g / ton copper sulfate, and 25-35g / ton No. 2 oil.

[0083] Working process: The heated and screened slurry enters the first trough of the rougher, and the reagent addition system is started at the same time. The agitators in each trough run at the set speed to form a stable flotation foam layer. The zinc concentrate foam is collected by the scraper into the concentrate trough, and the tailings enter the next processing link.

[0084] Compared with the related art, the method for recovering barite from lead-zinc tailings provided by the present invention has the following beneficial effects:

[0085] The present invention provides a method for recovering barite from lead-zinc tailings, which improves the recovery efficiency: through the activation effect of zinc sulfate, the collection effect of xanthate, the foaming effect of No. 2 oil and the inhibition effect of glass water, the recovery efficiency of barite is effectively improved;

[0086] Improved recovery accuracy: The recovery accuracy of barite is improved through heat screening to separate lead and copper, as well as multiple roughing and sweeping operations;

[0087] Strong adaptability: This method can effectively treat lead-zinc tailings containing high levels of dolomite and pyrite, solving the problem of difficulty in treating such tailings in existing technologies;

[0088] Environmental protection and energy saving: No other chemicals need to be added during the heating screening process, which reduces environmental pollution and reduces production costs.

[0089] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A method for recovering barite from lead-zinc tailings, characterized in that, The following steps are involved: S1, pretreatment stage: control the ball mill to grind the lead-zinc tailings to a fineness of 0.074mm, accounting for 72-75%, and control the slurry concentration of the lead-zinc tailings at 41%-45%. Add zinc sulfate at the pouring port of the ball mill in an amount of 1950-2050 g / ton; S2, roughing stage: the ground lead-zinc tailings are heated at 60°C, screened to separate lead and copper, and 95-105 g / ton of xanthate, 295-305 g / ton of copper sulfate, and 25-35 g / ton of No. 2 oil are added while stirring to perform roughing operation to obtain zinc concentrate; S3, concentrating stage: adding 4900-5100 g / ton of glass water and 290-310 g / ton of oleic acid, stirring at the same time, performing concentrating operation, adding 140-170 g / ton of sodium dodecyl sulfate for roughing to obtain barite rough concentrate and barite roughing tailings, adding 30-60 g / ton of sodium dodecyl sulfate to the barite roughing tailings for two scavenging to obtain flotation tailings, adding 1500-2000 g / ton, 1000-1300 g / ton, 500-700 g / ton, 500-700 g / ton and 500-700 g / ton of glass water in sequence, stirring after each addition, and finally obtaining barite.

2. The method for recovering barite from lead-zinc tailings according to claim 1, wherein In the pretreatment stage of S1, the contact area between the lead-zinc tailings and zinc sulfate is increased by grinding operation, and zinc sulfate is used as an activator to improve the recovery efficiency of barite. In the roughing stage of S2, xanthate is used as a collector and No. 2 oil is used as a frother, and the two cooperate to separate lead and copper in the lead-zinc tailings, thereby improving the efficiency of subsequent barite recovery. In the cleaning stage of S3, glass water is used as an inhibitor to improve the recovery efficiency of barite.

3. The method for recovering barite from lead-zinc tailings according to claim 1, wherein A screening device is used when screening lead-zinc tailings in S2. The screening device includes a mounting frame, a vibrator, a screen, two sliding components, a through slot, a bracket and two collecting boxes. The vibrator is installed on the top of the mounting frame, the screen is arranged inside the mounting frame, and the two sliding components are respectively arranged on both sides of the inner wall of the mounting frame. The sliding component includes a slide groove and a slider. The slide groove is opened on the inner wall of the mounting frame, and the slider is slidably connected to the inside of the slide groove and connected to the screen. The bracket is installed at the bottom of the mounting frame, and the two collecting boxes are both arranged inside the bracket. The through slot is opened at the bottom of the inner wall of the mounting frame.

4. The method for recovering barite from lead-zinc tailings according to claim 3, wherein Inclined plates are installed on both sides of the inner wall of the mounting frame and above the screen, support frames are connected on both sides of the interior of the mounting frame and below the screen, guide plates are connected on both sides of the inner wall of the mounting frame and below the two support frames, a support plate is installed at the bottom of the bracket, and a handle is installed on one side of the collection box.

5. A system for efficiently recovering barite from lead-zinc tailings, the method for recovering barite from lead-zinc tailings according to any one of claims 1 to 4, characterized in that: include: The grinding and activation unit includes an intelligent ball mill, a zinc sulfate quantitative addition system, and a slurry concentration control module, which is used to achieve precise grinding of lead-zinc tailings, quantitative activation of zinc sulfate, and slurry concentration control; Heating and screening unit, including gradient heating tank, high-frequency vibrating screen and lead-copper separation and collection device, is used to achieve constant temperature treatment of slurry and separation of lead and copper minerals; Roughing unit, including a multi-trough rougher and a reagent co-addition system, for efficient roughing of zinc concentrate; The selection unit includes an intelligent selection system, a sodium dodecyl sulfate processing module and a barite collection and purification system, which are used to achieve deep selection of barite and product purification.

6. The system for efficiently recovering barite from lead-zinc tailings according to claim 5, characterized in that The intelligent ball mill has a built-in laser particle size analyzer, which is linked with the PLC control system to realize automatic particle size adjustment.

7. The system for efficiently recovering barite from lead-zinc tailings according to claim 5, characterized in that The gradient heating tank adopts a three-layer jacket structure and is equipped with a temperature sensor to achieve constant temperature control.

8. The system for efficiently recovering barite from lead-zinc tailings according to claim 5, characterized in that The five-stage selection tank of the selection unit is equipped with a DCS distributed control system, which can realize the segmented and precise addition of glass water.

9. The system for efficiently recovering barite from lead-zinc tailings according to claim 5, characterized in that It also includes a central control system, which includes a BP neural network prediction model and a genetic algorithm optimization module to achieve intelligent operation of the system.

10. The system for efficiently recovering barite from lead-zinc tailings according to claim 5, characterized in that: The reagent collaborative addition system is used for adding xanthate, copper sulfate and No. 2 oil, the sodium dodecyl sulfate processing module is used for adding sodium dodecyl sulfate, and the barite collection and purification system is used for collecting and purifying barite.

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