Flotation process for pressurizing and stirring sulphide ore

Abstract

The invention discloses a flotation process for pressurizing and stirring sulphide ore, and relates to the technical field of sulphide ore flotation. Crushing and ore grinding; blending ore pulp; carrying out secondary ore grinding to obtain flotation ore pulp; wherein ore pulp is pumped into the grinding cylinder, an extrusion part is installed in the grinding cylinder, and the extrusion part extrudes the ore pulp to crush internal particles; the grinding component enters the bottom later; adding an activating agent, wherein the activating agent comprises copper sulfate and sodium hydrosulfide; copper flotation, zinc flotation and sulfur flotation are conducted in sequence, the areas are separated at intervals through separation nets, and lifting separation is conducted through a lifting mechanism on the top; scavenging and tailing treatment are conducted on the cleaned tailings, wherein after the scavenged tailings are subjected to thickening treatment, overflow water directly returns to the ground ore in the first step to be used; and tailings are subjected to follow-up treatment, so that the technical problems that more types of particles are easily adsorbed during diameter mixing flotation, and the high-quality product rate of each concentrate is low are solved.

Description

Technical Field

[0001] The invention relates to the technical field of sulfide ore flotation, in particular to a pressurized stirring flotation process for sulfide ore. Background Art

[0002] Sulfide ore refers to minerals rich in sulfur. Common sulfide ores include pyrite, chalcopyrite, galena, sphalerite, etc., as well as orange-red realgar and lemon-yellow orpiment. Sulfide ore contains a large amount of metal substances. After a series of processing and treatment of the sulfide ore, the metal substances in the sulfide ore can be extracted and utilized. There are many processing methods and processes for sulfide ore, among which flotation and separation of sulfide ore is one of them. Before flotation, the ore needs to be processed, crushed and ground to form a slurry, and then a frother is added to form hydrophilic properties. The collector captures specific elements to form floating particles, and the concentrate is captured layer by layer. There are also the following problems:

[0003] 1. Diameter mixed flotation is prone to adsorption of many types of particles, and the rate of fine concentrates produced is not high.

[0004] 2. When grinding the ore pulp, since it is in a flowing state, direct extrusion can easily squeeze out the ore pulp, making it difficult to form an abrasive effect.

[0005] 3. When grinding, the circulation area is too large and needs repeated grinding, and there is a lack of sampling area, which makes the grinding time-consuming;

[0006] 4. Flotation removes floating particles, and cannot be separated. Sample removal requires screening, and the rate of fine products is not high. Summary of the invention

[0007] In order to solve the above technical problems, the present invention provides the following technical solution: a flotation process of sulfide ore with pressurized stirring, comprising the following steps:

[0008] Step 1. Crushing and grinding: crushing the sulfide ore raw material, and grinding the crushed particles to an average particle size of A;

[0009] Step 2. Slurry: add water to adjust the slurry concentration, and add alkaline pH regulator to adjust the slurry to be weakly alkaline;

[0010] Step 3. Secondary grinding: Secondary grinding, grinding the pulp and grinding the particle size to B, which is required to be 0.5-0.8 of the size of A; grinding the sulfide ore and adding a masking agent to obtain flotation pulp; pumping the pulp into the grinding cylinder, which is equipped with an extruder, which squeezes the pulp and breaks the internal particles; then entering the grinding component at the bottom, the grinding component performs secondary grinding to reduce the size to B;

[0011] Step 4. Adding an activator, the activator includes copper sulfate and sodium hydrosulfide, the concentration is not less than 200g / t, and the mass ratio of copper sulfate to sodium hydrosulfide is 1:2;

[0012] Step 5. A flotation box is provided, wherein at least three groups of areas are provided in the flotation box;

[0013] m. Copper flotation: Add a mixed inhibitor of zinc sulfide and water glass to the flotation pulp, and then add a copper collector and a frother for flotation treatment to obtain copper concentrate and copper tailings;

[0014] n. Zinc flotation: Add iron sulfide mineral inhibitors, zinc collectors and frothers to copper tailings for flotation treatment to obtain zinc concentrate and zinc tailings;

[0015] 1. Sulfur flotation: Add iron sulfide mineral activator, sulfur collector and frother to zinc tailings for flotation treatment to obtain sulfur concentrate and selected tailings;

[0016] The areas are separated by separation nets and lifted and separated by a lifting mechanism on the top;

[0017] Step 6. Sweep the selected tailings and adjust the pH value to be weakly alkaline to form an effective slurry pumped back into the flotation box;

[0018] Step 7, tailings treatment: After the scavenging tailings are thickened, the overflow water is directly returned to the grinding in step 1 for use; the tailings are subsequently treated.

[0019] In a further technical solution, the mixed depressant in step 5 uses zinc sulfide and water glass in a mass ratio of 1:1; the copper collector includes ethyl xanthate, butyl xanthate and dithiocarbamic acid, wherein the mass ratio is 1:(2.4-3.8):1.4; the frother for copper flotation is methyl isobutyl carbinol and / or heavy pyridine.

[0020] In a further technical solution, in step 5, the zinc collector for zinc flotation includes black medicine and HB-365 composite collector, with a mass ratio of 1:3; the bubbling agent for zinc flotation includes pine oil or methyl isobutyl carbinol.

[0021] In a further technical solution, in step 5, the frother for sulfur flotation is polyethylene glycol dibenzyl ether; the sulfur collector for sulfur flotation is butyl xanthate, monothiocarbamate, and benzothiazole mercaptan, wherein the mass ratio is (2.5-2.9): 1:1.5.

[0022] In a further technical solution, the grinding cylinder includes a feed inlet, a fixed plate and a pressure plate are installed at the bottom of the feed inlet, a connecting net is installed between the bottom end of the pressure plate and the fixed plate, and the bottom of the pressure plate is hinged to the fixed plate;

[0023] A rotating wheel and a connecting rod are installed on the back of the pressure plate, one end of the connecting rod is hinged to the pressure plate, and the other end is hinged to the rotating wheel; the connecting rod is eccentrically installed on the rotating wheel and a rotating shaft is installed in the middle, the rotating shaft extends outside the grinding cylinder and is coaxially connected to a driving motor.

[0024] In a further technical solution, the grinding cylinder comprises an inclined upper plate and a rotating lower plate, wherein the inclined upper plate is provided with a liquid inlet hole and is vertically arranged to extend to the upper surface; the inclined upper plate is fixedly installed in the grinding cylinder;

[0025] A grinding groove is provided at the bottom of the inclined upper plate, and the top of the rotating lower plate is installed in the grinding groove, and grinding teeth are provided on both opposite sides; a fixed shaft is installed on the rotating lower plate, the fixed shaft passes through the grinding cylinder downward and is installed with a second drive motor, and the second drive motor is suitable for driving the rotating lower plate to rotate relative to the inclined upper plate.

[0026] In a further technical solution, a discharge hole is provided on the side of the grinding cylinder, and a circulation pipe is installed in the discharge hole, and a return pump and a stop valve are installed on the circulation pipe; a sampling tube is also installed on the circulation pipe, and a discharge valve is installed on the sampling tube.

[0027] In a further technical solution, a discharge pipe is installed at the bottom of the circulation pipe and connected to the flotation box, and a stop valve 2 is installed on the discharge pipe;

[0028] The flotation box comprises a box shell, at least two sets of electric push rods are installed on the top of the box shell, a bending plate is installed on the top of the electric push rod, and a partition plate is installed on the bottom of the bending plate, and the output end of the electric push rod is upward and fixedly connected to the bending plate;

[0029] A partition plate is arranged in the flotation box, an installation cavity is arranged in the partition plate, a partition plate is installed in the installation cavity; and filter screens are arranged on both sides of the partition plate.

[0030] In a further technical solution, a stirring rod is installed vertically in the flotation box, the stirring rod extends outside the flotation box and is equipped with a rotating motor;

[0031] A rotating rod is installed on the stirring rod, and a salvaging claw is installed on the rotating rod. The salvaging claw includes a plurality of groups of parallel bending rods 1; and adjacent bending rods 1 are not fitted together.

[0032] In a further technical solution, side grooves are installed on the outer layer of the flotation box, and a discharge claw is also installed on the flotation box. The discharge claw includes multiple sets of parallel bending rods 2, and the bending rod 1 is suitable for sliding across the bending rod 2 when rotating.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] The present invention adjusts the performance and composition of the ore pulp by adding corresponding foaming agents, inhibitors and capture agents in layers in sequence in the flotation box, optimizes and adjusts the corresponding copper concentrate, zinc concentrate and sulfur concentrate to be spun out, thereby improving the fine product rate of each concentrate. The present invention realizes the grinding of the ore pulp by providing a fixed plate and a pressure plate with a connecting net, and the connecting net has the effect of temporarily retaining the ore pulp, and flows out from both sides after being squeezed. Then, the grinding teeth between the inclined upper plate and the rotating lower plate at the bottom are symmetrically rotated to reduce the particle size. Then, the sampling tube on the circulation pipeline is used for detection to detect whether the particle size meets the standard. If it meets the standard, the stop valve 2 on the discharge pipeline is opened, the return pump and the stop valve 1 are closed, and the ore pulp is discharged into the flotation box. Different collectors and foaming agents are conveniently added in the area separated by the flotation box. Then, the electric push rod is used to open the partition plates at each position in sequence. When the rotating rod is rotated, multiple groups of floating particles can be hooked up by multiple groups of bending rods 1, and then inserted by bending rod 2 when the bending rod is at the second position, and are brought into the side groove when the bending rod 1 rotates, thereby realizing automatic removal of floating particles. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a flotation process flow chart of the present invention;

[0036] Figure 2 It is a schematic diagram of the front three-dimensional structure of the present invention;

[0037] Figure 3 is a back cross-sectional view of the present invention;

[0038] Figure 4 for Figure 3 A magnified view of part A;

[0039] Figure 5 It is a structural schematic diagram of the rotating lower plate in the present invention;

[0040] Figure 6 It is a side cross-sectional schematic diagram of the flotation box in the present invention.

[0041] In the figure: 1. grinding cylinder; 2. fixed plate; 3. pressure plate; 4. connecting net; 5. rotating wheel; 6. connecting rod; 7. driving motor 1; 8. inclined upper plate; 9. rotating lower plate; 10. liquid inlet hole; 11. grinding teeth; 12. fixed shaft; 13. driving motor 2; 14. circulation pipeline; 15. return pump; 16. stop valve 1; 17. sampling tube; 18. discharge pipeline; 19. stop valve 2; 20. flotation box; 21. box shell; 22. electric push rod; 23. partition plate; 24. partition plate; 25. filter screen; 26. stirring rod; 27. rotating motor; 28. rotating rod; 29. ​​bending rod 1; 30. side groove; 31. bending rod 2. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] Example

[0044] See also Figure 1-6 As shown, the present invention provides a technical solution, a flotation process of sulfide ore with pressurized stirring, comprising the following steps:

[0045] Step 1. Crushing and grinding: crushing the sulfide ore raw material, and grinding the crushed particles to an average particle size of A;

[0046] Step 2. Slurry: add water to adjust the slurry concentration, and add alkaline pH regulator to adjust the slurry to be weakly alkaline;

[0047] Step 3. Secondary grinding: Secondary grinding, grinding the pulp and grinding the particle size to B, which is required to be 0.5-0.8 of the size of A; grinding the sulfide ore and adding a masking agent to obtain flotation pulp; pumping the pulp into the grinding cylinder 1, which is equipped with an extruder, which squeezes the pulp and breaks the internal particles; then entering the grinding component at the bottom, the grinding component performs secondary grinding to reduce the size to B;

[0048] Step 4. Adding an activator, the activator includes copper sulfate and sodium hydrosulfide, the concentration is not less than 200g / t, and the mass ratio of copper sulfate to sodium hydrosulfide is 1:2;

[0049] Step 5. A flotation box 20 is provided, and at least three groups of areas are provided in the flotation box 20;

[0050] m. Copper flotation: Add a mixed inhibitor of zinc sulfide and water glass to the flotation pulp, and then add a copper collector and a frother for flotation treatment to obtain copper concentrate and copper tailings;

[0051] n. Zinc flotation: Add iron sulfide mineral inhibitors, zinc collectors and frothers to copper tailings for flotation treatment to obtain zinc concentrate and zinc tailings;

[0052] 1. Sulfur flotation: Add iron sulfide mineral activator, sulfur collector and frother to zinc tailings for flotation treatment to obtain sulfur concentrate and selected tailings;

[0053] The areas are separated by separation nets and lifted and separated by a lifting mechanism on the top;

[0054] Step 6. Sweep the selected tailings and adjust the pH value to be weakly alkaline to form an effective slurry pumped back into the flotation box 20;

[0055] Step 7, tailings treatment: After the scavenging tailings are thickened, the overflow water is directly returned to the grinding in step 1 for use; the tailings are subsequently treated.

[0056] The mixed depressant in step 5 is zinc sulfide and water glass in a mass ratio of 1:1; the copper collector includes ethyl xanthate, butyl xanthate and dithiocarbamic acid, wherein the mass ratio is 1:2.4-3.8:1.4; the frother for copper flotation is methyl isobutyl carbinol and / or heavy pyridine.

[0057] Correspondingly, the zinc collector for zinc flotation includes black medicine and HB-365 composite collector, with a mass ratio of 1:3; the bubbling agent for zinc flotation includes pine oil or methyl isobutyl carbinol.

[0058] In step 5, the frother for sulfur flotation is polyethylene glycol dibenzyl ether; the sulfur collector for sulfur flotation is butyl xanthate, monothiocarbamate, and benzothiazole mercaptan, wherein the mass ratio is 2.5-2.9:1:1.5.

[0059] like Figure 2 The grinding cylinder 1 includes a feed port, and a fixed plate 2 and a pressure plate 3 are installed at the bottom of the feed port. A connecting net 4 is installed between the bottom end of the pressure plate 3 and the fixed plate 2, and the bottom of the pressure plate 3 is hinged to the fixed plate 2; a rotating wheel 5 and a connecting rod 6 are installed on the back of the pressure plate 3, one end of the connecting rod 6 is hinged to the pressure plate 3, and the other end is hinged to the rotating wheel 5; the connecting rod 6 is eccentrically installed on the rotating wheel 5 and a rotating shaft is installed in the middle, the rotating shaft extends to the outside of the grinding cylinder 1 and is coaxially connected to a driving motor 7. The grinding cylinder 1 includes an inclined upper plate 8 and a rotating lower plate 9, and a liquid inlet hole 10 is opened in the inclined upper plate 8, and is vertically arranged to extend to the upper surface; the inclined upper plate 8 is fixedly installed in the grinding cylinder 1;

[0060] The bottom of the inclined upper plate 8 is provided with a grinding groove, and the top of the rotating lower plate 9 is installed in the grinding groove, and grinding teeth 11 are provided on both sides of the opposite sides. Figure 5 As shown; a fixed shaft 12 is installed on the rotating lower plate 9, the fixed shaft 12 passes downward through the grinding cylinder 1 and is installed with a drive motor 13, the drive motor 13 is suitable for driving the rotating lower plate 9 to rotate relative to the inclined upper plate 8.

[0061] A discharge hole is provided on the side of the grinding cylinder 1, and a circulation pipe 14 is installed in the discharge hole, and a return pump 15 and a stop valve 16 are installed on the circulation pipe 14; a sampling tube 17 is also installed on the circulation pipe 14, and a discharge valve is installed on the sampling tube 17.

[0062] A discharge pipe 18 is installed at the bottom of the circulation pipe 14 and is connected to the flotation box 20, and a stop valve 19 is installed on the discharge pipe 18; the flotation box 20 includes a box shell 21, at least two groups of electric push rods 22 are installed on the top of the box shell 21, and a bending plate is installed on the top of the electric push rod 22, and a partition plate 23 is installed on the bottom of the bending plate, and the output end of the electric push rod 22 is upward and fixedly connected to the bending plate; a partition plate 24 is arranged in the flotation box 20, an installation cavity is arranged in the partition plate 24, and the partition plate 23 is installed in the installation cavity; filters 25 are arranged on both sides of the partition plate 24.

[0063] like Figure 3 As shown, a stirring rod 26 is vertically installed on the flotation box 20, the stirring rod 26 extends outside the flotation box 20 and is installed with a rotating motor 27; a rotating rod 28 is installed on the stirring rod 26, and a salvage claw is installed on the rotating rod 28, and the salvage claw includes a plurality of sets of parallel bent rods 29; and adjacent bent rods 29 are not fitted together.

[0064] like Figure 6 As shown, a side groove 30 is installed on the outer layer of the flotation box 20, and a discharge claw is also installed on the flotation box 20, and the discharge claw includes multiple sets of parallel bending rods 2 31, and the bending rod 1 29 is suitable for crossing and sliding with the bending rod 2 31 when rotating. When the rotating rod is rotated, multiple sets of floating particles can be hooked up by multiple sets of bending rods 1, and then inserted by the bending rods 2 when passing through the bending rods 2, and brought into the side groove when the bending rods 1 rotate.

Claims

1. The flotation process of sulfide ore with pressurized stirring is characterized by: The following steps are involved: Step 1. Crushing and grinding: crushing the sulfide ore raw material, and grinding the crushed particles to an average particle size of A; Step 2. Slurry: add water to adjust the slurry concentration, and add alkaline pH regulator to adjust the slurry to be weakly alkaline; Step 3. Secondary grinding: Grind the ore pulp and grind the particle size to B, which is required to be 0.5-0.8 of the size of A; grind the sulfide ore and add a masking agent to obtain a flotation slurry; pump the slurry into a grinding cylinder (1), wherein an extruder is installed in the grinding cylinder (1), and the extruder squeezes the slurry to break the internal particles; then the slurry enters the grinding component at the bottom, and the grinding component performs secondary grinding to reduce the size to B; Step 4. Adding an activator, the activator includes copper sulfate and sodium hydrosulfide, the concentration is not less than 200g / t, and the mass ratio of copper sulfate to sodium hydrosulfide is 1:2; Step 5. A flotation box (20) is provided, wherein at least three groups of areas are provided in the flotation box (20); m. Copper flotation: Add a mixed inhibitor of zinc sulfide and water glass to the flotation pulp, and then add a copper collector and a frother for flotation treatment to obtain copper concentrate and copper tailings; n. Zinc flotation: Add iron sulfide mineral inhibitors, zinc collectors and frothers to copper tailings for flotation treatment to obtain zinc concentrate and zinc tailings; 1. Sulfur flotation: Add iron sulfide mineral activator, sulfur collector and frother to zinc tailings for flotation treatment to obtain sulfur concentrate and selected tailings; The areas are separated by separation nets and lifted and separated by a lifting mechanism on the top; Step 6. Sweep the selected tailings and adjust the pH value to a weakly alkaline state to form an effective slurry which is pumped back into the flotation box (20); Step 7, tailings treatment: After the scavenging tailings are thickened, the overflow water is directly returned to the grinding in step 1 for use; the tailings are subsequently treated.

2. The flotation process of sulfide ore with pressurized stirring according to claim 1, characterized in that: The mixed depressant in step 5 uses zinc sulfide and water glass in a mass ratio of 1:1; the copper collector includes ethyl xanthate, butyl xanthate and dithiocarbamic acid, wherein the mass ratio is 1:(2.4-3.8):1.4; the frother for copper flotation is methyl isobutyl carbinol and / or heavy pyridine.

3. The flotation process of sulfide ore with pressurized stirring according to claim 1, characterized in that: In step 5, the zinc collector for zinc flotation includes black medicine and HB-365 composite collector, with a mass ratio of 1:3; the bubbling agent for zinc flotation includes pine oil or methyl isobutyl carbinol.

4. The flotation process of sulfide ore with pressurized stirring according to claim 1, characterized in that: In step 5, the frother for sulfur flotation is polyethylene glycol dibenzyl ether; the sulfur collector for sulfur flotation is butyl xanthate, monothiocarbamate, and benzothiazole mercaptan, wherein the mass ratio is (2.5-2.9): 1:1.

5.

5. The flotation process of sulfide ore with pressurized stirring according to claim 1, characterized in that: The grinding cylinder (1) comprises a feed inlet, a fixed plate (2) and a pressure plate (3) are installed at the bottom of the feed inlet, a connecting net (4) is installed between the bottom end of the pressure plate (3) and the fixed plate (2), and the bottom of the pressure plate (3) is hinged to the fixed plate (2); A rotating wheel (5) and a connecting rod (6) are installed on the back of the pressure plate (3), one end of the connecting rod (6) is hinged to the pressure plate (3), and the other end is hinged to the rotating wheel (5); the connecting rod (6) is eccentrically installed on the rotating wheel (5) and a rotating shaft is installed in the middle, the rotating shaft extends to the outside of the grinding cylinder (1) and is coaxially connected to a driving motor (7).

6. The flotation process of sulfide ore with pressurized stirring according to claim 5, characterized in that: The grinding cylinder (1) comprises an inclined upper plate (8) and a rotating lower plate (9); a liquid inlet hole (10) is provided in the inclined upper plate (8) and is vertically arranged to extend to the upper surface; the inclined upper plate (8) is fixedly installed in the grinding cylinder (1); A grinding groove is provided at the bottom of the inclined upper plate (8), and the top of the rotating lower plate (9) is installed in the grinding groove, and grinding teeth (11) are provided on opposite sides; a fixed shaft (12) is installed on the rotating lower plate (9), the fixed shaft (12) passes through the grinding cylinder (1) downward and is installed with a second driving motor (13), and the second driving motor (13) is suitable for driving the rotating lower plate (9) to rotate relative to the inclined upper plate (8).

7. The flotation process of sulfide ore with pressurized stirring according to claim 5, characterized in that: The grinding cylinder (1) is provided with a discharge hole on the side thereof, and a circulation pipe (14) is installed in the discharge hole, and a return pump (15) and a stop valve (16) are installed on the circulation pipe (14); a sampling pipe (17) is also installed on the circulation pipe (14), and a discharge valve is installed on the sampling pipe (17).

8. The flotation process of sulfide ore with pressurized stirring according to claim 5, characterized in that: A discharge pipe (18) is installed at the bottom of the circulation pipe (14) and is connected to the flotation box (20), and a stop valve 2 (19) is installed on the discharge pipe (18); The flotation box (20) comprises a box housing (21), at least two groups of electric push rods (22) are installed on the top of the box housing (21), a bending plate is installed on the top of the electric push rod (22), and a partition plate (23) is installed on the bottom of the bending plate, and the output end of the electric push rod (22) is upward and fixedly connected to the bending plate; The flotation box (20) is provided with a partition plate (24), a mounting cavity is provided in the partition plate (24), and a partition plate (23) is installed in the mounting cavity; filter screens (25) are provided on both sides of the partition plate (24).

9. The flotation process of sulfide ore with pressurized stirring according to claim 5, characterized in that: A stirring rod (26) is vertically mounted on the flotation box (20), the stirring rod (26) extends outside the flotation box (20) and is mounted with a rotating motor (27); A rotating rod (28) is mounted on the stirring rod (26), and a fishing claw is mounted on the rotating rod (28). The fishing claw comprises a plurality of groups of parallel bending rods (29); and adjacent bending rods (29) are not in contact with each other.

10. The flotation process of sulfide ore with pressurized stirring according to claim 5, characterized in that: A side groove (30) is installed on the outer layer of the flotation box (20), and a discharge claw is also installed on the flotation box (20). The discharge claw includes a plurality of parallel bending rods (31). The bending rod (29) is suitable for sliding across the bending rod (31) when rotating.

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