A flotation separation process for chalcopyrite and pyrite

Abstract

The present invention belongs to a mineral processing technology, and specifically relates to a flotation separation process for arsenic tetrahedrite and pyrite. The process comprises the following steps: flotation machine suppresses arsenic to float copper, flotation machine suppresses arsenic to float zinc, zinc tailings thickening, two roughing selections on flotation machine, addition of sodium sulfide, xanthate and BK201, two rough scavenging selections on flotation machine, regrinding, arsenic-sulfur separation and fine roughing on flotation machine, arsenic-sulfur separation and fine selection on flotation machine, and arsenic-sulfur separation and scavenging on flotation machine. This method effectively reduces the arsenic content in copper concentrate, achieves the separate recovery of arsenic tetrahedrite, avoids the loss of valuable metals, and achieves maximum resource utilization. This method effectively controls the arsenic content of the concentrate product to be below the national control standard by flexibly proportioning low-arsenic copper concentrate and high-arsenic low-grade copper concentrate. This method combines a sand mill with a cyclone to achieve closed-circuit grinding, effectively reducing the load of the sand mill and improving the fineness of the grinding product. This method returns the fine scavenging tailings to the zinc tailings thickener to enter the process for drug removal and reselection, avoiding direct tailings discarding and resulting in copper metal loss.

Description

Technical Field

[0001] The invention belongs to a mineral processing technology, and in particular relates to a flotation separation process of chalcopyrite and pyrite. Background Art

[0002] Tetrahedrite, a major copper sulfide mineral, is widely distributed and occurs in various deposits, but its concentration is generally low. In typical volcanic massive sulfide copper deposits, the primary sulfide mineral is pyrite, while the main copper minerals are chalcopyrite and arsenite, with smaller amounts of chalcocite and bornite. Tetrahedrite has an extremely fine particle size, complex interbedded structures, and a predominantly dense, disseminated micro-grained structure. The metallic sulfide minerals exhibit low floatability, making separation extremely challenging. The enrichment of arsenic tetrahedrite during flotation can lead to arsenic levels in copper concentrate exceeding national standards, making it difficult to sell and reducing the sales valuation factor. Discarding this mineral through arsenic reduction beneficiation methods results in significant copper metal loss, resulting in significant economic losses. For arsenic tetrahedrite in raw ore, companies typically investigate the occurrence and occurrence of arsenic-containing copper ore within the ore body. Where possible, they may select high- and low-arsenic ore for blending, but this blending process is inconsistent. Therefore, the current focus of industry enterprises is on solving the sales outlet of concentrate.

[0003] At present, a high copper-zinc ratio copper-zinc sulfide ore beneficiation and separation method with patent number CN114589002A on the market includes the following steps: S1, mixing: mixing the raw ore of the high copper-zinc ratio copper-zinc sulfide ore with a first depressant, a first collector and water, stirring and grinding the ore to form a raw ore pulp, wherein the first depressant is a mixture of slaked lime and aniline black in a weight ratio of 8 to 10:3, and the first collector is a mixture of an ester collector and a xanthate collector in a weight ratio of 2 to 5:1; S2, first flotation: subjecting the raw ore pulp to a first flotation to obtain a first copper-zinc mixed concentrate and mixed tailings, the mixed tailings are discarded, and the first copper-zinc mixed concentrate is reserved; S3, magnetic separation: the first copper-zinc mixed concentrate is subjected to magnetic separation to obtain magnetic concentrate and magnetic tailings, the magnetic concentrate is the first copper concentrate, and the magnetic tailings is the second copper-zinc mixed concentrate, and the magnetic separation intensity is 1.3T; S4, thickening: the second copper-zinc mixed concentrate is subjected to thickening, the thickened underflow is reserved, and the thickened overflow is discarded; S5, second flotation: the thickened underflow in S4 is added with a second depressant and a second collector, and then subjected to a second flotation to obtain a second copper concentrate and a zinc concentrate.

[0004] This process solves the current problems of low flotation separation efficiency, complex separation process, high reagent cost and great environmental impact in some copper-zinc ores with high copper-zinc ratios. It is very necessary to develop new methods for the mineral processing and separation of copper-zinc sulfide ores with high copper-zinc ratios.

[0005] But there is also a problem. This process cannot solve the problem of excessive arsenic content in copper concentrate. Summary of the Invention

[0006] This solution provides a flotation separation process for arsenic tetrahedrite and pyrite to solve the problem of excessive arsenic content in copper concentrate.

[0007] To achieve the above objectives, this solution provides a flotation separation process for chalcopyrite and pyrite, comprising the following steps:

[0008] Step S10: zinc tailings thickening: the tailings are pumped into a zinc tailings thickener for thickening, and then the concentrated tailings are put into a mixing tank for slurry adjustment, and industrial lime is added to adjust the pH value of the slurry;

[0009] Step S20: The product of step S20 is fed into a flotation machine for two roughing operations: sodium sulfide, xanthate and BK201 are sequentially added in the first roughing operation, and butyl xanthate is added in the second roughing operation for two roughing operations. The foam from the two roughing operations is fed into a middling thickener for concentration and then regrinded.

[0010] Step S30: Flotation machine performs two rough sweeping operations: Adding butyl xanthate as a collector, sweeping the tailings twice, and returning the sweeping concentrate sequence to the previous operation cycle. The second sweeping tailings are the rough tailings discharge process.

[0011] Step S40: The two roughing foams obtained in step S30 are concentrated and Na2S is added to remove the drug, and then fed into the moxa sand mill for grinding.

[0012] Step S50: Add butyl xanthate to the grinding product obtained in step S40, and the concentrate enters the flotation machine for flotation separation of arsenic tetrahedrite and pyrite to obtain low-grade copper concentrate twice. The flotation machine for flotation separation of arsenic tetrahedrite and pyrite includes a flotation machine body, characterized in that it also includes a bubble generator and a turbulence plate, the turbulence plate is fixedly connected to the through pipe, and the turbulence plate is parallel to the flotation tank, the bubble generator includes a bottom plate, a filter plate, an L-shaped slide plate, a spring and a piston plate; the bottom plate is fixedly connected to the flotation tank , the bottom plate is provided with a slide groove, the filter plate is slidably connected to the slide groove, the L-shaped slide plate matches the filter plate, the filter plate is provided with filter holes, one end of the spring is fixedly connected to the slide groove, and the other end is fixedly connected to the filter plate, the bottom plate is provided with an air cavity, the air cavity is slidably connected to the piston plate, the piston plate is fixedly connected to the filter plate, and the air cavity is provided with a first one-way valve and a second one-way valve, the first one-way valve is connected to the float tank, and the second one-way valve is connected to the external space; the screened tailings are sequentially returned to the previous operation cycle;

[0013] Step S60: adding sodium sulfide as an inhibitor to a foam tank, and obtaining high-arsenic low-grade copper concentrate after two rounds of concentrating. The tailings are returned to the previous operation in sequence.

[0014] Step S70: Add butyl xanthate, scavenging once, and return the scavenged concentrate product to the previous operation. The tailings are returned to the zinc tailing thickener for concentration and then enter the process for reselection.

[0015] The principle of this scheme is as follows: the operator uses a thickener to thicken the zinc tailings, then performs a roughing operation by adding sodium sulfide, xanthate, and BK201, and a second roughing operation by adding butyl xanthate, to obtain crude copper foam and impurity tailings. The impurity tailings are then subjected to a second roughing operation by a flotation machine to completely remove the copper foam, and the tailings are then placed in a tailings pond. The operator then thickens the crude copper ore obtained by the two roughing operations and adds Na2S to remove the drug. The ore is then ground in an agar sand mill to obtain crude copper ore. Butyl xanthate is then added to the crude copper ore, and the resulting concentrate enters a flotation machine for flotation separation of arsenic tetrahedrite and pyrite.

[0016] Pour the slurry into the liquid inlet tank, start the first and second motors, and the main shaft drives the impeller to rotate, while the horizontal shaft drives the scraper to rotate. As the impeller rotates, a suction force is generated, causing the slurry in the liquid inlet tank to be sucked into the liquid inlet pipe and then into the through pipe. At the same time, air from the outside space is also sucked into the through pipe through the air inlet pipe. Both then pass through the through pipe and enter the flotation tank. The impeller stirs the slurry and air, allowing more hydrophobic ore in the slurry to adhere to the bubbles.

[0017] At the same time, as the impeller rotates, a rotational force is generated, driving the liquid to rotate and hit the filter plate. The filter plate compresses the spring due to the impact of the liquid, and the piston plate also moves backward. The internal space of the air cavity becomes larger, generating suction, and drawing in external air through the second one-way valve.

[0018] At the same time, due to the excessive impact of the liquid, the L-shaped slide plate will be pushed upward due to its shape and structure, causing the L-shaped slide plate to move upward, and the filter holes on the filter plate to open, allowing liquid and bubbles to pass through the filter holes to form more small bubbles. At the same time, due to the opening of the filter holes, the force area of ​​the filter plate becomes smaller, and the spring bounces the filter plate back to its initial position. The filter plate drives the piston plate forward, squeezing the air in the air cavity, so that the gas can only enter the float tank from the first one-way valve, generating new bubbles. The bubbles pass through the filter holes on the filter plate under the action of the rotational force, forming more small bubbles, and the hydrophobic minerals attached to the small bubbles enter the foam layer.

[0019] As the liquid passes through the filter plate, the impact becomes smaller, and the L-shaped slide will fall due to gravity and return to its initial state. At the same time, the falling L-shaped slide can scrape the filter holes on the filter plate, and the cycle is repeated.

[0020] Repeating this process twice yields a low-grade copper concentrate, with the tailings returning to the previous cycle. Sodium sulfide, a depressant, is then added, and after two rounds of concentration, a high-arsenic, low-grade copper concentrate is obtained. The tailings are then returned to the previous cycle. Finally, butyl xanthate is added, and the scavenged concentrate product is returned to the previous cycle. The tailings are then concentrated in the zinc tailings thickener and then re-selected.

[0021] The beneficial effects of this solution are: 1. This method effectively reduces the arsenic content in copper concentrate, realizes the separate recovery of chalcopyrite, avoids the loss of valuable metals, and achieves the maximum utilization of resources. 2. This method effectively controls the arsenic content of the concentrate product to be lower than the national control standard by flexibly proportioning low-arsenic copper concentrate and high-arsenic low-grade copper concentrate. 3. The flotation machine for flotation separation of chalcopyrite and pyrite in this solution can produce more bubbles, and at the same time make the bubbles small and numerous, thereby increasing the flotation efficiency of the flotation machine. At the same time, each up and down movement of the L-shaped slide can scrape the filter holes to prevent the filter holes from being blocked. 4. This method returns the finely swept tailings to the zinc tailings thickener to enter the process for de-drugation and re-selection to avoid direct tailings discarding and causing loss of copper metal.

[0022] Furthermore, in step S5, copper is floated on a flotation cell to suppress arsenic, the pH of the slurry is adjusted, and then a suppressant is added. After three rounds of concentrating and three rounds of scavenging, the tailings enter the zinc selection stage. Furthermore, zinc is floated on a flotation cell to suppress arsenic, lime is added to the copper tailings, and butyl xanthate is then added for one roughing round and two scavenging rounds to produce zinc tailings. This method is environmentally friendly and utilizes commercially available mineral processing chemicals for arsenic reduction, eliminating the need for high-energy methods such as high temperature and high pressure. Flexible dosages of sodium sulfide can serve as both a suppressant and a decontamination agent.

[0023] Furthermore, the bubble generators in step S50 are provided with four, and the bubble generators are arranged coaxially with the impeller. Arranging multiple bubble generators around the impeller can enhance the generation of bubbles and the treatment of large bubbles.

[0024] Furthermore, the turbulence plate in step S50 is provided with a plurality of holes. The turbulence plate is provided with holes that can transform large bubbles into small bubbles, so that more small bubbles can be formed when the bubbles pass through, thereby improving the efficiency of the flotation machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 The following is a process flow chart of a flotation separation process of arsenic tetrahedrite and pyrite.

[0026] Figure 2 This is a front cross-sectional view of a flotation machine for flotation separation of arsenic tetrahedrite and pyrite.

[0027] Figure 3 This is a diagram of the bubble generator and bottom plate structure of a flotation machine for flotation separation of arsenic tetrahedrite and pyrite.

[0028] Figure 4 This is a front view of the filter plate and L-shaped slide of a flotation machine device for flotation separation of arsenic tetrahedrite and pyrite. Specific implementation methods

[0029] The marks in the drawings of the specification include: 1. first motor; 2. second motor; 3. float tank; 4. horizontal axis; 5. main shaft; 6. liquid inlet box; 7. pulley; 8. through pipe; 9. air inlet pipe; 10. liquid inlet pipe; 11. turbulence plate; 12. bottom plate; 13. impeller; 14. filter plate; 15. L-shaped slide plate; 16. spring; 17. air cavity; 18. piston plate; 19. first one-way valve; 20. second one-way valve; 21. scraper; 22. filter hole.

[0030] The embodiment is basically as shown in the attached Figure 1 As shown:

[0031] This solution provides a flotation separation process for chalcopyrite and pyrite, comprising the following steps:

[0032] (1) Flotation machine suppresses arsenic and floats copper: as shown in the attached Figure 2 As shown:

[0033] This invention provides a flotation machine for the flotation separation of arsenic tetrahedrite and pyrite. The flotation machine comprises a first motor 1, a second motor 2, a flotation tank 3, a horizontal shaft 4, a main shaft 5, a liquid inlet tank 6, a pulley 7, a through pipe 8, an air inlet pipe 9, a liquid inlet pipe 10, a turbulence plate 11, a bottom plate 12, an impeller 13, a filter plate 14, an L-shaped slide 15, a spring 16, an air chamber 17, a piston plate 18, a first check valve 19, a second check valve 20, a scraper 21, and filter holes 22. The first motor 1 and the second motor 2 utilize high-power three-phase asynchronous motors with integrated reduction gearboxes (model Y90S-6). The entire flotation tank 3 is fixedly connected to the bottom plate 12, which is provided with feet for placement on the ground. The first motor 1 is fixedly connected to the main shaft 5 via a coupling. The main shaft 5 is rotatably connected to the float tank 3 via bearings. The main shaft 5 is located inside a through-tube 8, the distal end of which communicates with the float tank 3. This in turn communicates with an air intake pipe 9, which in turn communicates with a liquid inlet pipe 10. The other end of the air intake pipe 9 is connected to the exterior of the float tank 3 for natural air intake. The other end of the liquid inlet pipe 10 is connected to the liquid inlet tank 6. A turbulator 11 is bolted to the distal end of the through-tube 8 to stabilize the foam layer and prevent it from spreading. The turbulator 11 is provided with numerous small holes for generating small bubbles. An impeller 13 is fixedly connected to the distal end of the main shaft 5, agitating the air and the mineral solution. The second motor 2 is fixedly connected to the transverse shaft 4 via a coupling. Two scrapers 21 are bolted to the transverse shaft 4. These scrapers 21 are located above the float tank 3, their travel range corresponding to the foam layer within the float tank 3, ensuring effective scraping of the foam.

[0034] As attached Figure 2 、 Figure 4 As shown:

[0035] The base plate 12 is equipped with a filter plate 14, an L-shaped slide 15, a spring 16, an air cavity 17, a piston plate 18, a first one-way valve 19, and a second one-way valve 20. Four filter plates 14 are provided, and the base plate 12 is provided with four chutes, each of which slides in a sliding manner within the chutes on the base plate 12. The filter plate 14 slides in contact with the L-shaped slide 15, and a stopper is provided on the filter plate 14 to prevent it from sliding out of the filter plate 14. The L-shaped slide 15 is curved at the top, and the upright portion of the L-shaped slide 15 has a hole, which creates a floating effect when subjected to liquid impact. An air cavity 17 is provided within the base plate 12, and the piston plate 18 slides in contact with the air cavity 17. The piston plate 18 is fixedly connected to the filter plate 14. The filter plate 14 is provided with filter holes 22 for generating small bubbles. One end of the spring 16 is fixedly connected to the chute, and the other end is fixedly connected to the filter plate 14. A first one-way valve 19 is disposed outside the piston plate 18. One end of the first one-way valve 19 communicates with the float tank 3 and the other end communicates with the air cavity 17. Gas can only flow into the float tank 3 from the air cavity 17. A second one-way valve 20 is disposed outside the piston plate 18. One end of the second one-way valve 20 communicates with the outside world and the other end communicates with the air cavity 17. Gas can only flow into the air cavity 17 from the outside world.

[0036] As attached Figure 2 、 Figure 3 、 Figure 4 As shown:

[0037] The flotation machine used here is for separating arsenic tetrahedrite from pyrite. The ore to be separated is ground in a sand mill. A chemical solution is then added to the ore, mixing it into a slurry. The slurry is then poured into a liquid inlet tank 6. The first and second motors 1 and 2 are activated, and the main shaft 5 drives the impeller 13, while the horizontal shaft 4 drives the scraper 21. The rotation of the impeller 13 generates a suction force, drawing the slurry from the liquid inlet tank 6 into the liquid inlet pipe 10 and into the passage 8. Simultaneously, air from the outside is also drawn into the passage 8 through the air inlet pipe 9. Both then pass through the passage 8 and enter the flotation tank 3. The impeller 13 stirs the slurry and air, allowing more hydrophobic ore in the slurry to adhere to the bubbles. At the same time, as the impeller 13 rotates, a rotational force is generated, which drives the liquid to rotate and hit the filter plate 14. The filter plate 14 compresses the spring 16 due to the impact of the liquid. At the same time, the piston plate 18 also moves backward, and the internal space of the air cavity 17 becomes larger, generating suction, and sucking in external air through the second one-way valve 20. At the same time, due to the excessive impact of the liquid, the L-shaped slide 15 is pushed upward due to its structure, causing it to move upward. The filter holes 22 on the filter plate 14 open, allowing liquid and bubbles to pass through the filter holes 22, forming more small bubbles. At the same time, due to the opening of the filter holes 22, the force applied to the filter plate 14 decreases, and the spring 16 rebounds the filter plate 14 back to its original position. The filter plate 14 drives the piston plate 18 forward, squeezing the air in the air cavity 17 so that the gas can only enter the flotation tank 3 through the first one-way valve 19, generating new bubbles. The bubbles, under the action of the rotational force, pass through the filter holes 22 on the filter plate 14, forming more small bubbles. The small bubbles are attached to the hydrophobic ore and enter the foam layer. As the liquid passes through the filter plate 14, the impact is reduced, and the L-shaped slide 15 falls due to gravity, returning to its original position, and the cycle repeats. This solution increases the amount of bubbles and makes the bubbles smaller and more numerous, thereby improving the flotation efficiency of the flotation machine. At the same time, each upward and downward movement of the L-shaped slide 15 scrapes the filter holes 22, preventing clogging of the filter holes 22.

[0038] The flotation machine for flotation separation of arsenic tetrahedrite and pyrite is used for copper roughing. The pH value of the pulp is adjusted to 7.0, and the amount of inhibitor Na2S added is 200g / t. After three rounds of concentration, the copper concentrate with arsenic content less than 1% is obtained. After three rounds of scavenging, the tailings enter the zinc selection stage.

[0039] (2) Flotation machine to suppress arsenic and float zinc: add 8kg / t of industrial lime to the copper tailings to adjust the pH value of the pulp to 11.8, and add butyl xanthate in the amounts of 14g / t, 12g / t, and 4g / t in sequence. Roughing once and scavenging twice are performed to obtain zinc tailings.

[0040] (3) Thickening of zinc tailings: The high-sulfur zinc tailings with a concentration of 12% obtained in step (2) are pumped into the zinc tailing thickener for concentration. After concentration to make the underflow concentration of the thickener reach 52%, the tailings are sent to the mixing tank for slurry adjustment. 8 kg / t of industrial lime (based on dry ore, the same below) is added to adjust the pH value of the slurry to 11.5;

[0041] (4) Flotation machine two roughing: The pulp obtained in step (3) is fed into the flotation machine. Sodium sulfide, xanthate and BK201 are added in the roughing first step in the dosage of 50-80 g / t, 35-44 g / t and 0-5 g / t respectively. Butyl xanthate is added in the dosage of 25-35 g / t for two roughing steps. The foam from the two roughing steps enters the middling thickener for concentration and then is re-ground.

[0042] (5) Flotation machine performs two rough sweeping operations: Add butyl xanthate (10 g / t) as a collector and sweep twice. The sweeping concentrate returns to the previous operation cycle in sequence, and the tailings from the second sweeping operation are discharged as the rough tailings.

[0043] (6) Regrinding: The two roughing foams obtained in step (4) are concentrated and 50 g / t of Na2S is added for de-doping. The bottom flow of the middling thickener is controlled to be 45-50% and fed into the agar sand mill for grinding. The grinding fineness is controlled to be P80@16~25 μm.

[0044] (7) Flotation machine for arsenic and sulfur separation and rough selection: 45-50 g / t of butyl xanthate is added to the grinding product obtained in step (6), and the concentrate enters the flotation machine for selection twice to obtain low-grade copper concentrate, and the tailings are returned to the previous operation cycle in sequence.

[0045] (8) Flotation machine arsenic and sulfur separation and selection: A foam tank is selected and an inhibitor, sodium sulfide 100g / t, is added. After two selections, a high-arsenic low-grade copper concentrate is obtained, and the tailings are returned to the previous operation in sequence.

[0046] (9) Flotation machine arsenic-sulfur separation scavenging: add butyl xanthate 5g / t, scavenging once, the scavenged concentrate product returns to the previous operation, and the tailings return to the copper tailing thickener for concentration before entering the process for re-selection.

[0047] The above is only an embodiment of the present invention. Common knowledge such as the specific structure and characteristics of the scheme is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several variations and improvements can be made, which should also be considered as the scope of protection of the present invention. These will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A flotation separation process for chalcopyrite and pyrite, characterized in that: The following steps are involved: step S10: Zinc tailings thickening: The tailings are pumped into the zinc tailings thickener for thickening, and then the concentrated tailings are sent to the mixing tank for slurry adjustment, and industrial lime is added to adjust the pH value of the slurry; Step S20: The product of step S10 is fed into a flotation machine for two roughing operations: sodium sulfide, xanthate and BK201 are sequentially added in the first roughing operation, and butyl xanthate is added in the second roughing operation for two roughing operations. The foam from the two roughing operations is fed into a middling thickener for concentration and then regrinded. Step S30: Flotation machine performs two rough sweeping operations: Adding butyl xanthate as a collector, sweeping the tailings twice, and returning the sweeping concentrate sequence to the previous operation cycle. The second sweeping tailings are the rough tailings discharge process. Step S40: The two roughing foams obtained in step S20 are concentrated and Na2S is added to remove the drug, and then fed into the moxa sand mill for grinding. Step S50: Add butyl xanthate to the grinding product obtained in step S40, and the arsenic-sulfur separation and roughing concentrate of the flotation machine enters the flotation machine for flotation separation of arsenic chalcopyrite and pyrite for two times of selection, and sodium sulfide, an inhibitor, is added to the flotation tank. After two selections, a high-arsenic low-grade copper concentrate is obtained. The flotation machine for flotation separation of arsenic chalcopyrite and pyrite includes a flotation machine body, a bubble generator and a turbulence plate. The turbulence plate is fixedly connected to the through pipe, which is a pipe connecting the liquid inlet pipe, the air inlet pipe and the flotation tank. The turbulence plate is parallel to the flotation tank. The bubble generator includes a bottom plate, a filter plate, An L-shaped slide plate, a spring and a piston plate; the bottom plate is fixedly connected to the float tank, a slide groove is provided on the bottom plate, the filter plate is slidably connected to the slide groove, the L-shaped slide plate matches the filter plate, the filter plate is provided with filter holes, one end of the spring is fixedly connected to the slide groove, and the other end is fixedly connected to the filter plate, the bottom plate is provided with an air cavity, the air cavity is slidably connected to the piston plate, the piston plate is fixedly connected to the filter plate, and the air cavity is provided with a first one-way valve and a second one-way valve, the first one-way valve is connected to the float tank, and the second one-way valve is connected to the external space; the tailings floated out are sequentially returned to the previous operation cycle; Step S60: Add butyl xanthate to the tailings after the roughing and fine selection in S50, scavenging the concentrate product once and return it to the previous operation. The tailings are returned to the zinc tailing thickener for concentration and then enter the process for reselection.

2. The flotation separation process of chalcopyrite and pyrite according to claim 1, characterized in that: The method further includes step S5 before step S10: using a flotation machine to suppress arsenic and float copper, adjusting the pH value of the pulp and then adding inhibitors, and then performing three concentrations and three scavenging of the tailings to enter the zinc selection stage; using a flotation machine to suppress arsenic and float zinc, adding lime to the copper selection tailings, and then sequentially adding butyl xanthate for one roughing selection and two scavenging selections to obtain zinc selection tailings.

3. The flotation separation process of chalcopyrite and pyrite according to claim 1, characterized in that: The bubble generators in step S50 are provided with four, and the bubble generators are arranged coaxially with the impeller.

4. The flotation separation process of chalcopyrite and pyrite according to claim 1, characterized in that: The turbulence plate in step S50 is provided with a plurality of holes.

Images