A gravity separation device and process for copper tailings

Abstract

The invention discloses a gravity separation device and process for copper tailings, and relates to the field of gravity separation technology. The gravity separation device and process for copper tailings include a screening and washing part and a discharge part, the screening and washing part are integrally formed, a slag leakage hole is provided at the bottom of the screening and washing part, and a plugging member for plugging the slag leakage hole is provided at the bottom of the screening and washing part; a stirring motor is provided at the top of the discharge part through a fixing member, and the end of the output shaft of the stirring motor is connected to the screening control component; the stirring member includes a rotating drum and a stirring blade, the stirring blade is fixedly connected to the surface of the rotating drum, and the screening control component is connected to the inside of the rotating drum; a concentrate solid-liquid separation component is provided at each output port of the discharge part, and also includes a support cylinder fixedly arranged at the bottom of the screening and washing part, and the top of the support cylinder is movably connected to the stirring member, which solves the problem that the ore material in the prior art is accumulated at the bottom, which is inconvenient to be fully mixed with the flotation agent, resulting in low output and waste of copper tailings.

Description

Technical Field

[0001] The present invention relates to the technical field of gravity separation, and particularly to a gravity separation device and process for copper tailings. Background Art

[0002] Gravity separation is a beneficiation method based on the density difference between minerals. In a certain medium flow (usually water, heavy liquid or heavy suspension), it is loosened by the buoyancy, power or other mechanical forces of the fluid, and under the combined action of gravity (or centrifugal force) and viscous resistance and other composite forces, different density mineral particles are stratified and transferred, so as to achieve the separation of useful minerals and gangue; the existing gravity separation equipment, such as a beneficiator and an intelligent beneficiation method disclosed in Chinese Patent Publication No.: CN114798154A, includes a beneficiation tank with a feed port, a driving mechanism arranged at the top of the beneficiation tank, a transmission shaft driven by the driving mechanism and arranged at the center of the beneficiation tank, a high-density mineral separation mechanism arranged at the bottom of the transmission shaft, and a medium- and low-density mineral separation mechanism arranged above the high-density mineral separation mechanism; this structure is simple and has high beneficiation efficiency, but the beneficiation path of this structure is short. When the slurry enters the beneficiator, the light slurry is quickly sunk by being wrapped by the high-density slurry, and subsequently, only through the impeller stirring, the light slurry cannot be quickly guided to float; the beneficiator of this structure can only perform primary selection, and subsequent beneficiation agents are still required for secondary flotation.

[0003] A Chinese invention patent with the publication number of CN118002324B discloses a beneficiator and an intelligent beneficiation method, including a flotation tank, a two-stage reduced-diameter cylinder section, a screw lifter, a stirring assembly, a beneficiation discharge assembly and a tailing throwing assembly. The two sides of the flotation tank are integrally formed with material lifting slopes, the top surface of the material lifting slopes is integrally formed with material dropping slopes, and a material dropping channel is arranged at the bottom of the material dropping slopes; a hole seat is arranged on the top surface of the flotation tank; a rotary bearing is fixed in the hole seat; a protruding part is integrally formed on the side of the flotation tank; a motor cavity seat is arranged inside the protruding part of the flotation tank; the top of the protruding part is fixed with a top plate by bolts; the two-stage reduced-diameter cylinder section is integrally formed at the bottom of the flotation tank and is communicated with the flotation tank; a pulp feed pipe is arranged at the upper part of the two-stage reduced-diameter cylinder section; a reduced-diameter port is arranged at the inner bottom of the two-stage reduced-diameter cylinder section.

[0004] However, the following problems exist in the process of lifting the ore by the screw lifter in the prior art: Since the stirring assembly is always stirring and the ore is in a moving state, the ore is filled with liquid between the ore and the ore, and the screw lifter may be difficult to effectively lift the ore. In this case, the ore will accumulate at the bottom, which is inconvenient to be fully mixed with the flotation agent, resulting in low output and waste of copper tailings. Summary of the Invention

[0005] In view of the deficiencies of the prior art, the present invention provides a gravity separation device and process for copper tailings, which solves the problems in the prior art that the ore materials are piled up at the bottom, inconvenient to be fully mixed with the flotation agent, resulting in low output and waste of copper tailings.

[0006] To achieve the above objectives, the present invention is realized through the following technical solutions: A gravity separation device for copper tailings includes a screening cylinder and a stirring member disposed inside the screening cylinder. The screening cylinder includes a screening and washing part and a discharging part, which are integrally formed. A slag leakage hole is provided at the bottom of the screening and washing part, and a plugging member is provided at the bottom of the screening and washing part for plugging the slag leakage hole; A stirring motor is provided at the top of the discharging part through a fixing member, and the end of the output shaft of the stirring motor is connected to a screening control assembly. The screening control assembly drives the stirring member to rotate under the drive of the stirring motor; The stirring member includes a rotating cylinder and stirring blades, and the stirring blades are fixedly connected to the surface of the rotating cylinder. The screening control assembly is connected to the inside of the rotating cylinder; A concentrate solid-liquid separation assembly is provided at each output port of the discharging part. The concentrate solid-liquid separation assembly includes a concentrate separation component and a beneficiation liquid storage component. It also includes a support cylinder fixedly provided at the bottom of the screening and washing part, and the top of the support cylinder is movably connected to the stirring member.

[0007] Further, the concentrate separation component includes a screen cloth, a driving roller and a driven roller. Both ends of the driving roller and the driven roller are connected to a gear box. One of the gear boxes is driven and connected to a rotating motor. The screen cloth is in transmission connection with the driving roller and the driven roller. Two extrusion rods are also in transmission connection between the two gear boxes. The screen cloth passes through the two extrusion rods, and the gear box is fixedly connected to the bottom of the discharging part; The beneficiation liquid storage component includes a liquid storage tank, which is fixedly connected to the bottom of the gear box. A diversion inclined frame is fixedly connected to the surface of the liquid storage tank, and a scraping plate is fixedly connected to the surface of the diversion inclined frame. The surface of the scraping plate is connected to the surface of the screen cloth.

[0008] Further, the screening control assembly includes a connecting pipe and an electromagnetic block, the connecting pipe is fixedly connected to the output shaft of the stirring motor, the surface of the electromagnetic block is connected to the inner side wall of the connecting pipe, the electromagnetic block is fixedly connected to the surface of the first electric push rod, the first electric push rod is movably arranged at the top of the rotating cylinder, and the output shaft of the first electric push rod movably penetrates the rotating cylinder and extends to the inside of the rotating cylinder; a rubber ring is arranged at the top of the inner side wall of the rotating cylinder through an extension tube, and the inner side wall of the rubber ring is movably connected to the surface of the output shaft of the first electric push rod; the screening control assembly also includes two adjustment controls, the adjustment controls include a circular ring and a special-shaped tooth petal fixedly connected to the inside of the circular ring, the circular ring is fixedly connected to the inside of the rotating cylinder, the end of the output shaft of the first electric push rod is fixedly connected to a rotating ring, the surface of the rotating ring is connected to a toggle member through a toggle spring, the toggle member includes a toggle part and a stop part, the toggle part and the stop part are integrally formed, the connection between the toggle part and the stop part is movably sleeved on the surface of the rotating ring, and the toggle spring is arranged at the connection between the toggle part and the stop part.

[0009] Furthermore, the surface of the connecting tube is fixedly connected to an electromagnetic ring via a connecting arm, the top of the rotating cylinder is fixedly connected to a magnetic ring via a supporting rod, the inner side wall of the magnetic ring is movably connected to the surface of the electromagnetic ring, and the top of the electromagnetic ring is fixedly connected to a gear ring via a connecting column; the top of the ore discharge part is fixedly connected to a second electric push rod, and the end of the output shaft of the second electric push rod is fixedly connected to a gear block.

[0010] Furthermore, the bottom of the rotating ring is connected to a third electric push rod through a round rod, the end of the output shaft of the third electric push rod is fixedly connected to a toothed part, the top of the support cylinder is fixedly connected to a card and a part, and the toothed part is arranged on the top of the card and the part; the bottom of the liquid storage tank is fixedly connected to an infusion pump, the output port of the infusion pump is fixedly connected to an infusion tube, the infusion tube is fixedly connected to an annular tube, the annular tube is fixedly sleeved on the surface of the screening part, the surface of the annular tube is fixedly connected to a flushing tube, the flushing tube is fixedly penetrated through the screening part and extends to the inside of the screening part.

[0011] Furthermore, it also includes a copper tailings grinding component arranged inside the support tube, the copper tailings grinding component is arranged at the bottom of the stirring element, and is used to grind the copper tailings particles. A mineral processing liquid circulation component is arranged between the copper tailings grinding component and the stirring element.

[0012] Further, the copper tailings grinding component includes a hollow grinding piece and a fourth electric push rod. The bottom of the hollow grinding piece is arc-shaped and has sieve holes. The end of the output shaft of the fourth electric push rod is fixedly connected to the surface of the hollow grinding piece. A support plate is fixedly connected inside the support cylinder. The upper surface of the support plate is fixedly connected with a grinding motor. The end of the output shaft of the grinding motor is fixedly connected to the surface of the fourth electric push rod. The support cylinder is connected to the rotating cylinder through a second sealing bearing.

[0013] Further, the ore dressing liquid circulation component includes a suction pipe and a sleeve pipe. One end of the suction pipe is fixedly penetrated into the inside of the hollow grinding piece. The other end of the suction pipe is movably inserted into the inside of the sleeve pipe. The sleeve pipe is fixedly connected with the annular plate. The annular plate is connected to the inner wall of the support cylinder and the surface of the support plate through a first sealing bearing. A fixed pipe is fixedly connected to the top of the support plate. The other end of the fixed pipe fixedly penetrates the support cylinder. A first solenoid valve is fixedly connected inside the fixed pipe. A second solenoid valve is fixedly connected inside the rotating cylinder. A circulation pipe is fixedly connected inside the rotating cylinder. The top end of the circulation pipe is fixedly connected to a liquid extraction pump. The output port of the liquid extraction pump is fixedly connected with a liquid outlet pipe. A third solenoid valve is fixedly connected to the surface of the liquid outlet pipe. A fourth solenoid valve is fixedly connected to the surface of the rotating cylinder.

[0014] Further, a first rubber ring is fixedly sleeved on the surface of the hollow grinding piece. A second rubber ring is fixedly connected inside the support cylinder. The surface of the first rubber ring is movably connected to the inner side wall of the support cylinder. The inner side wall of the second rubber ring is movably connected to the surface of the hollow grinding piece.

[0015] A gravity ore dressing process for copper tailings, which is used for the above-mentioned gravity ore dressing equipment for copper tailings, includes the following steps: injecting pulp and flotation reagents into the screening and washing part. The stirring motor drives the stirring piece to rotate through the ore screening control component to stir the pulp and flotation reagents. The light pulp floats up and flows into the concentrate solid-liquid separation component through the ore discharging part for solid-liquid separation. The light ore materials after solid-liquid separation are placed in a centrifuge for centrifugal gravity separation. The copper tailings grinding component grinds the precipitated pulp that sinks to the bottom of the screening and washing part. The ground precipitated pulp is lifted above the screening and washing part through the ore dressing liquid circulation component. After the ore dressing is completed, the rotating ring contacts the regulating part located below. The stirring motor starts to vibrate the rotating cylinder for solid-liquid separation. The fourth solenoid valve is opened. The ore dressing liquid circulation component discharges the separated liquid out of the screening and washing part. Regularly conduct quality inspections on the products of each step to determine the garnet content, impurity components and mineral structure. The methods for quality inspection include X-ray fluorescence spectrometry, X-ray diffraction analysis and microscopic observation. The blocking part is separated from the screening and washing part. The flushing pipe flushes the stirring blades to discharge the waste residue.

[0016] The present invention has the following beneficial effects:

[0017] (1) The gravity separation equipment and process for copper tailings can fully mix the slurry with the flotation agent during the stirring process by arranging a hollow grinding part, a liquid pump and a stirring part, thereby improving the output of light ore and solving the problem that the ore accumulates at the bottom and is inconvenient to be fully mixed with the flotation agent, resulting in low output and waste of copper tailings.

[0018] (2) The gravity beneficiation equipment and process for copper tailings, when the stirring motor rotates in the forward direction, can drive the ring and the rotating cylinder to rotate synchronously through the toggle part and the special-shaped tooth petal, thereby causing the stirring blade to rotate. When the stirring motor rotates in the reverse direction, the toggle part will hit the special-shaped tooth petal. Since there is no stopper to limit the reverse rotation, the toggle part will rotate around the axis and reset under the action of the torsion spring, thereby continuing to hit the special-shaped tooth petal.

[0019] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0021] Figure 2 It is a schematic diagram of the structure of the gear ring of the present invention.

[0022] Figure 3 It is a structural schematic diagram of the sealing member of the present invention.

[0023] Figure 4 It is a schematic diagram of the internal structure of the screening and washing part of the present invention.

[0024] Figure 5 It is a schematic diagram of the structure of the annular pipe of the present invention.

[0025] Figure 6 It is a schematic diagram of the internal structure of the rotating cylinder of the present invention.

[0026] Figure 7 It is a schematic diagram of the structure of the connecting pipe of the present invention.

[0027] Figure 8 It is a structural schematic diagram of the electromagnetic block of the present invention.

[0028] Figure 9 For the present invention Figure 8 A magnified view of the structure in the middle.

[0029] Figure 10 It is a schematic diagram of the internal structure of the liquid storage tank of the present invention.

[0030] Figure 11 It is a schematic diagram of the structure of the hollow grinding piece of the present invention.

[0031] Figure 12 It is a schematic diagram of the structure of the rotating ring of the present invention.

[0032] Figure 13 It is a schematic diagram of the structure of the circulation pipe of the present invention.

[0033] Figure 14 It is a schematic diagram of the structure of the sleeve pipe of the present invention.

[0034] Figure 15 It is a structural schematic diagram of the fourth electric push rod of the present invention.

[0035] Figure 16 It is a structural schematic diagram of the second solenoid valve of the present invention.

[0036] Figure 17 The bar graph is the X-ray diffraction result.

[0037] Figure 18 This is a bar chart comparing the garnet content calculated by X-ray diffraction and random sampling.

[0038] Figure 19 This is the process flow chart of gravity separation of copper tailings.

[0039] In the figure, 1, ore screening cylinder; 101, screening and washing part; 102, ore discharging part; 2, stirring member; 201, rotating cylinder; 202, stirring blade; 3, slag leakage hole; 4, plugging member; 5, stirring motor; 6, supporting cylinder; 7, screen cloth; 8, active roller; 9, driven roller; 10, rotating motor; 11, extrusion rod; 12, liquid storage tank; 13, diversion inclined frame; 14, scraper; 15, connecting pipe; 16, electromagnetic block; 17, first electric push rod; 18, rubber ring; 19, circular ring; 20, special-shaped tooth petal; 21, rotating ring; 22, toggle part; 23, stopper; 24, electromagnetic ring; 25, magnetic ring; 26, Gear ring; 27, second electric push rod; 28, gear block; 29, third electric push rod; 30, clamping tooth piece; 31, clamping piece; 32, infusion pump; 33, infusion tube; 34, annular tube; 35, flushing tube; 36, hollow grinding piece; 37, fourth electric push rod; 38, suction tube; 39, support plate; 40, grinding motor; 41, sleeve tube; 42, annular plate; 43, fixed tube; 44, first solenoid valve; 45, second solenoid valve; 46, circulation tube; 47, liquid pump; 48, liquid outlet tube; 49, third solenoid valve; 50, fourth solenoid valve; 51, first rubber ring; 52, second rubber ring. DETAILED DESCRIPTION

[0040] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0041] Please refer to Figures 1 - 16 , an embodiment of the present invention provides a technical solution: a gravity separation device for copper tailings, including a screening cylinder 1 and a stirring member 2 arranged inside the screening cylinder 1. The screening cylinder 1 includes a screening and washing part 101 and a discharging part 102. The screening and washing part 101 and the discharging part 102 are integrally formed. A slag leakage hole 3 is arranged at the bottom of the screening and washing part 101, and a plugging member 4 for plugging the slag leakage hole 3 is arranged at the bottom of the screening and washing part 101; a stirring motor 5 is arranged at the top of the discharging part 102 through a fixing member. The end of the output shaft of the stirring motor 5 is connected to a screening control assembly. The screening control assembly drives the stirring member 2 to rotate under the drive of the stirring motor 5; the stirring member 2 includes a rotating cylinder 201 and stirring blades 202. The stirring blades 202 are fixedly connected to the surface of the rotating cylinder 201, and the screening control assembly is connected to the inside of the rotating cylinder 201; a concentrate solid-liquid separation assembly is arranged at each output port of the discharging part 102. The concentrate solid-liquid separation assembly includes a concentrate separation part and a beneficiation liquid storage part. It also includes a support cylinder 6 fixedly arranged at the bottom of the screening and washing part 101. The top of the support cylinder 6 is movably connected to the stirring member 2.

[0042] Specifically, the concentrate separation part includes a screen cloth 7, a driving roller 8 and a driven roller 9. Both ends of the driving roller 8 and the driven roller 9 are connected to a gear box. One of the gear boxes is drivingly connected to a rotating motor 10. The screen cloth 7 is in transmission connection with the driving roller 8 and the driven roller 9. Two extrusion rods 11 are also in transmission connection between the two gear boxes. The screen cloth 7 passes through the two extrusion rods 11, and the gear box is fixedly connected to the bottom of the discharging part 102; the beneficiation liquid storage part includes a liquid storage tank 12. The liquid storage tank 12 is fixedly connected to the bottom of the gear box. A diversion inclined frame 13 is fixedly connected to the surface of the liquid storage tank 12. A scraping plate 14 is fixedly connected to the surface of the diversion inclined frame 13. The surface of the scraping plate 14 is connected to the surface of the screen cloth 7.

[0043] In this implementation scheme, the light ore materials first flow onto the screen cloth 7. The screen cloth 7 can separate the liquid and the light ore materials, and the light ore materials stay on the screen cloth 7. With the transmission of the driving roller 8 and the driven roller 9, the screen cloth 7 transports the light ore materials. The scraping plate 14 can scrape off the light ore materials and drop them onto the diversion inclined frame 13. The extrusion rods 11 can extrude the screen cloth 7, so as to extrude the retained liquid. The liquid enters the liquid storage tank 12 for collection and retention.

[0044] Specifically, the ore screening control assembly includes a connecting tube 15 and an electromagnetic block 16. The connecting tube 15 is fixedly connected to the output shaft of the stirring motor 5. The surface of the electromagnetic block 16 is connected to the inner wall of the connecting tube 15. The electromagnetic block 16 is fixedly connected to the surface of the first electric push rod 17. The first electric push rod 17 is movably arranged on the top of the rotating cylinder 201, and the output shaft of the first electric push rod 17 movably penetrates the rotating cylinder 201 and extends to the inside of the rotating cylinder 201; a rubber ring 18 is arranged on the top of the inner wall of the rotating cylinder 201 through an extension tube, and the inner wall of the rubber ring 18 is connected to the output shaft of the first electric push rod 17. Surface movable connection; the screening control assembly also includes two adjustment controls, the adjustment controls include a ring 19 and a special-shaped tooth petal 20 fixedly connected to the inside of the ring 19, the ring 19 is fixedly connected to the inside of the rotating cylinder 201, the end of the output shaft of the first electric push rod 17 is fixedly connected to a rotating ring 21, the surface of the rotating ring 21 is connected to a toggle member through a toggle spring, the toggle member includes a toggle part 22 and a stop part 23, the toggle part 22 and the stop part 23 are integrally formed, the connection between the toggle part 22 and the stop part 23 is movably sleeved on the surface of the rotating ring 21, and the toggle spring is arranged at the connection between the toggle part 22 and the stop part 23.

[0045] In this embodiment, when the output shaft of the stirring motor 5 rotates forward, the toggle part 22 will squeeze the special-shaped tooth petal 20, and the squeezing force will be transmitted to the stop part 23. The stop part 23 is connected to the rotating ring 21, which can prevent the toggle part from rotating around the axis, so that the annular ring 19 and the rotating cylinder 201 can be driven to rotate synchronously through the special-shaped tooth petal 20, thereby rotating the stirring blade 202. The stirring motor 5 rotates in the reverse direction, and the first electric push rod 17 is rotated through the connecting tube 15 and the electromagnetic block 16. During the rotation, the toggle part 22 will hit the special-shaped tooth petal 20. Since there is no limit of the stop part 23 during the reverse rotation, the toggle part 22 will rotate around the axis and reset under the action of the torsion spring, thereby continuing to hit the special-shaped tooth petal 20.

[0046] Specifically, the surface of the connecting tube 15 is fixedly connected to the electromagnetic ring 24 through a connecting arm, the top of the rotating cylinder 201 is fixedly connected to the magnetic ring 25 through a supporting rod, the inner wall of the magnetic ring 25 is movably connected to the surface of the electromagnetic ring 24, and the top of the electromagnetic ring 24 is fixedly connected to the gear ring 26 through a connecting column; the top of the ore discharge part 102 is fixedly connected to the second electric push rod 27, and the end of the output shaft of the second electric push rod 27 is fixedly connected to the gear block 28.

[0047] Specifically, the bottom of the rotating ring 21 is connected with a third electric push rod 29 through a round rod. The end of the output shaft of the third electric push rod 29 is fixedly connected with a toothed part 30. The top of the support cylinder 6 is fixedly connected with a clamping part 31. The toothed part 30 is arranged on the top of the clamping part 31. The bottom of the liquid storage tank 12 is fixedly connected with an infusion pump 32. The output port of the infusion pump 32 is fixedly connected with an infusion pipe 33. The infusion pipe 33 is fixedly connected with an annular pipe 34. The annular pipe 34 is fixedly sleeved on the surface of the screening and washing part 101. The surface of the annular pipe 34 is fixedly connected with a flushing pipe 35. The flushing pipe 35 fixedly penetrates through the screening and washing part 101 and extends into the interior of the screening and washing part 101.

[0048] In this embodiment, the liquid in the liquid storage tank 12 enters the screening and washing part 101 through the infusion pump 32 and the infusion pipe 33, and then the liquid is sprayed on the rotating cylinder 201 and the stirring blades 202 through the flushing pipe 35 to realize vibration cleaning.

[0049] Specifically, it further includes a copper tailings grinding component arranged inside the support cylinder 6. The copper tailings grinding component is arranged at the bottom of the stirring part 2 and is used for grinding copper tailings particles. A beneficiation liquid circulation component is arranged between the copper tailings grinding component and the stirring part 2.

[0050] The copper tailings grinding component includes a hollow grinding part 36 and a fourth electric push rod 37. The bottom of the hollow grinding part 36 is arc-shaped and has sieve holes. The end of the output shaft of the fourth electric push rod 37 is fixedly connected with the surface of the hollow grinding part 36. A support plate 39 is fixedly connected inside the support cylinder 6. The upper surface of the support plate 39 is fixedly connected with a grinding motor 40. The end of the output shaft of the grinding motor 40 is fixedly connected with the surface of the fourth electric push rod 37. The support cylinder 6 is connected with the rotating cylinder 201 through a second sealing bearing.

[0051] In this embodiment, the fourth electric push rod 37 drives the hollow grinding part 36 to move upward, so that the ore deposited at the bottom of the screening and washing part 101 can automatically flow to the bottom of the hollow grinding part 36. Then the hollow grinding part 36 moves downward to extrude the ore. In addition, the grinding motor 40 is started to drive the fourth electric push rod 37 and the hollow grinding part 36 to rotate, and cooperate with the extrusion force to grind the ore.

[0052] Specifically, the ore dressing liquid circulation assembly includes a suction pipe 38 and a sleeve pipe 41. One end of the suction pipe 38 is fixedly penetrated into the interior of the hollow grinding member 36, and the other end of the suction pipe 38 is movably inserted into the interior of the sleeve pipe 41. The sleeve pipe 41 is fixedly connected to the annular plate 42. The annular plate 42 is connected to the inner wall of the support cylinder 6 and the surface of the support plate 39 through a first sealing bearing. A fixed pipe 43 is fixedly connected to the top of the support plate 39. The other end of the fixed pipe 43 fixedly penetrates the support cylinder 6, and a first electromagnetic valve 44 is fixedly connected to the interior of the fixed pipe 43; a second electromagnetic valve 45 is fixedly connected to the interior of the rotating cylinder 201, a circulation pipe 46 is fixedly connected to the interior of the rotating cylinder 201, the top end of the circulation pipe 46 is fixedly connected to the liquid extraction pump 47, the output port of the liquid extraction pump 47 is fixedly connected to a liquid outlet pipe 48, and a third electromagnetic valve 49 is fixedly connected to the surface of the liquid outlet pipe 48; a fourth electromagnetic valve 50 is fixedly connected to the surface of the rotating cylinder 201.

[0053] In this embodiment, the liquid extraction pump 47 is started, and at the same time, the first electromagnetic valve 44 and the third electromagnetic valve 49 are opened, and the fourth electromagnetic valve 50 and the second electromagnetic valve 45 are closed. When the liquid extraction pump 47 is started, the ground slurry inside the hollow grinding member 36 enters the enclosed space formed by the support plate 39 and the annular plate 42 through the suction pipe 38 and the sleeve pipe 41, and then enters the enclosed space formed by the rotating cylinder 201 and the support cylinder 6 through the fixed pipe, and finally enters the circulation pipe 46 and is discharged through the third electromagnetic valve 49 on the liquid outlet pipe 48. In order to prevent the slurry from directly discharging from the end of the liquid outlet pipe 48 into the ore discharging part 102, a fifth electromagnetic valve can be provided at the end of the liquid outlet pipe 48.

[0054] Specifically, a first rubber ring 51 is fixedly sleeved on the surface of the hollow grinding member 36, a second rubber ring 52 is fixedly connected to the interior of the support cylinder 6, the surface of the first rubber ring 51 is movably connected to the inner side wall of the support cylinder 6, and the inner side wall of the second rubber ring 52 is movably connected to the surface of the hollow grinding member 36.

[0055] In this embodiment, the first rubber ring 51 and the second rubber ring 52 can play an effect of sealing and preventing leakage.

[0056] A gravity separation process for copper tailings, used for the above-mentioned gravity separation equipment for copper tailings, such as Figure 19As shown, the process comprises the following steps: injecting ore pulp and flotation reagent into the screening and washing section 101, the stirring motor 5 rotates the stirring member 2 through the screening and washing control component to stir the ore pulp and the flotation reagent, the light slurry floats up, and flows into the concentrate solid-liquid separation component through the discharge section 102 for solid-liquid separation; the light ore after solid-liquid separation is placed in a centrifuge for centrifugal reselection; the copper tailings grinding component grinds the precipitated slurry sunk to the bottom of the screening and washing section 101, and the ground precipitated slurry is lifted to the top of the screening and washing section 101 through the mineral processing liquid circulation component; the mineral processing is completed. After that, the rotating ring 21 contacts the adjustment control unit located below, the stirring motor 5 is started, the rotating cylinder 201 vibrates, and the solid-liquid separation is carried out. The fourth solenoid valve 50 is opened, and the mineral processing liquid circulation component discharges the separated liquid from the screening and washing part 101; the quality of the products of each step is regularly inspected to determine the garnet content, impurity components and mineral structure. The quality inspection methods include X-ray fluorescence spectroscopy analysis, X-ray diffraction analysis and microscope observation; the sealing member 4 is separated from the screening and washing part 101, and the flushing pipe 35 flushes the stirring blade 202 to discharge the waste residue.

[0057] When in use, the ore pulp and flotation agent are transported to the inside of the screen frame cylinder through an external conveying device, and the water level of the mixed ore pulp and flotation agent is always slightly higher than the edge of the discharge part 102, so that the ore pulp after flotation can flow easily. In order to fully mix the ore pulp and the flotation agent, the stirring motor 5 is started, and the electromagnetic block 16 is energized and magnetically conductive, and is fixedly connected to the connecting pipe 15, and the special-shaped tooth petal 20 located above the inside of the rotating cylinder 201 is connected to the toggle member on the rotating ring 21, and the electromagnetic ring 24 is powered off, and the magnetic conductive ring 25 moves with the electromagnetic ring 24, and the second electric push rod 27 causes the tooth block 28 to break contact with the tooth ring 26. When the output shaft of the stirring motor 5 rotates in the forward direction, the toggle part 22 will be squeezed by the special-shaped tooth petal 20, and the squeezing force is transmitted to the stop part 23. The stop part 23 is connected to the rotating ring 21, which can prevent the toggle part from rotating around the axis, so that the special-shaped tooth petal 20 can drive the ring 19 and the rotating cylinder 201 to rotate synchronously, and then the stirring blade 202 can be rotated, so as to achieve the mixing of the slurry and the flotation agent, so that the light mineral in the slurry is mixed with the flotation agent and floats.

[0058] The floating light mineral material flows with the liquid to the discharge part 102, and the discharge part 102 is provided with an inclined surface, so that the light mineral material flows with the liquid to the concentrate separation component. The light mineral material first flows to the screen cloth 7, which can separate the liquid and the light mineral material, and the light mineral material is retained on the screen cloth 7. With the transmission of the active roller 8 and the driven roller 9, the screen cloth 7 transports the light mineral material, and the scraper 14 can scrape the light mineral material and drop it onto the guide inclined frame 13. The squeezing rod 11 can squeeze the screen cloth 7, thereby squeezing out the retained liquid, and the liquid enters the liquid storage tank 12 for collection and retention.

[0059] Some heavy mineral materials will automatically sink, and in order to more efficiently screen out light mineral materials, the mineral materials deposited at the bottom of the screening and washing section 101 can be circulated from bottom to top and fully mixed with the flotation agent. In addition, in order to further increase the output of light mineral materials, heavy mineral materials can be ground and crushed.

[0060] The fourth electric push rod 37 drives the hollow grinding member 36 to move upward, so that the mineral material deposited at the bottom of the screening and washing part 101 automatically flows to the bottom of the hollow grinding member 36, and then the hollow grinding member 36 moves downward to squeeze the mineral material. In addition, the grinding motor 40 is started to drive the fourth electric push rod 37 and the hollow grinding member 36 to rotate, and the mineral material is grinded with the squeezing force. After grinding for a period of time, the fourth electric push rod 37 drives the hollow grinding member 36 to move upward. The liquid pump 47 is started, and at the same time, the first solenoid valve 44 and the third solenoid valve 49 are opened, and the fourth solenoid valve 50 and the second solenoid valve 45 are closed. The liquid pump 47 is started, and the ground slurry inside the hollow grinding member 36 enters the closed space formed by the support plate 39 and the annular plate 42 through the suction pipe 38 and the sleeve pipe 41, and then enters the closed space formed by the rotating cylinder 201 and the support cylinder 6 through the fixed pipe, and finally enters the circulation pipe 46, and is discharged through the third solenoid valve 49 on the liquid outlet pipe 48. In order to prevent the slurry from being directly discharged from the very end of the liquid outlet pipe 48 into the ore discharge section 102, a fifth solenoid valve can be set at the very end of the liquid outlet pipe 48.

[0061] Based on the above steps, the slurry in the screening cylinder 1 can be fully mixed with the flotation agent to achieve stirring circulation and grinding of the ore, thereby increasing the output of light ore.

[0062] After a period of gravity flotation, the waste copper ore needs to be discharged. In order to better utilize the components in the waste copper ore and save water resources, solid-liquid separation can be performed in the screening cylinder 1, and the separated liquid can be used as one of the raw materials for the next gravity flotation.

[0063] The tooth block 28 is engaged with the tooth ring 26 to fix the rotating cylinder 201. The first electric push rod 17 drives the rotating ring 21 to move downward, so that the position of the toggle part 22 and the stop part 23 contacts the special-shaped tooth petal 20 at the bottom of the rotating cylinder 201. The waste copper ore automatically sinks under the action of gravity and is deposited at the bottom of the screening and washing part 101. The stirring motor 5 rotates in the opposite direction, and the first electric push rod 17 is rotated through the connecting pipe 15 and the electromagnetic block 16. During the rotation, the toggle part 22 will hit the special-shaped tooth petal 20. Since there is no limit of the stop part 23 during the reverse rotation, the toggle part 22 will rotate around the axis and reset under the action of the torsion spring, thereby continuing to hit the special-shaped tooth petal 20. The residual vibration of the impact will vibrate the waste copper ore deposited at the bottom of the screening and washing part 101, so that the liquid in the waste copper ore automatically seeps upward, and more effectively achieves solid-liquid separation.

[0064] After that, the fourth electromagnetic valve 50 fixed on the surface of the rotating drum 201 is opened, and the liquid located above the waste copper ore layer can be automatically discharged into the interior of the rotating drum 201. After the first electromagnetic valve 44 and the third electromagnetic valve 49 are closed, the second electromagnetic valve 45 is opened, and the liquid pump 47 is started to extract the liquid inside the rotating drum 201 and discharge it into the ore discharge part 102, and then after being separated again by the concentrate separation component, the liquid is stored in the liquid storage tank 12.

[0065] Finally, the external lifting structure moves the plugging member 4 downward to open the slag leakage hole 3, and the waste copper ore is discharged from the slag leakage hole 3. In order to discharge the waste copper ore faster, the toggle part 22 hits the special-shaped tooth petal 20 again to accelerate the falling of the waste copper ore.

[0066] After the waste copper ore is discharged, in order not to affect the next gravity flotation, the inside of the screening and washing part 101 needs to be cleaned. The process is as follows:

[0067] The third electric push rod 29 moves the toothed member 30 downward and docks with the card and member 31 on the support cylinder 6, thereby fixing the support cylinder 6 and the rotating cylinder 201. At the same time, the electromagnetic block 16 is powered off, the electromagnetic ring 24 is powered on, and the tooth block 28 is separated from the tooth ring 26. The stirring motor 5 is started, and the magnetic ring 25 is driven to rotate through the connecting tube 15 and the electromagnetic ring 24, thereby rotating the rotating cylinder 201. At this time, the toggle part 22 is also in contact with the special-shaped tooth petal 20 at the bottom of the rotating cylinder 201. In the case of collision, the rotating cylinder 201 and the stirring blade 202 vibrate. At the same time, the liquid in the liquid storage tank 12 enters the screening and washing part 101 through the infusion pump 32 and the infusion tube 33, and then the liquid is sprayed on the rotating cylinder 201 and the stirring blade 202 through the flushing tube 35 to achieve vibration cleaning.

[0068] In the process of purifying garnet after recovering valuable elements such as copper and sulfur in tailings, it was found that the purification of garnet by flotation was not effective. Therefore, it is urgent to develop a new purification process to separate and purify garnet and other minerals in tailings as the target product for high-value utilization of tailings.

[0069] First, a mineral processing experiment was carried out. The sample unit was the 321 Geological Team of the Anhui Provincial Bureau of Geology and Mineral Exploration, which was sent to the test unit through logistics. There was a total of 1 sample (the test record number was: 2024-435). The sample was the tailings of copper-sulfur selection (recovered garnet) that was re-floated to remove sulfur, a total of 500 kilograms, and the Fe grade was 8.03% after sampling and testing.

[0070] The test process is as follows: 1: After the samples are mixed evenly, the primary separation process of the SLon-500 vertical ring pulsating high-gradient magnetic separator is adopted. The concentrate after magnetic separation is reground to 90% passing 400 mesh, and then subjected to a second high-intensity magnetic separation. The concentrate after magnetic separation is further separated by a centrifuge; 2: After the samples are mixed evenly, the primary separation process of the SLon-50 vertical ring pulsating high-gradient magnetic separator is adopted. The concentrate after magnetic separation is directly separated by a centrifuge once. The concentrate from the centrifuge is used as the qualified product, and the tailings from the centrifuge are ground to 90% passing 400 mesh and then subjected to a high-intensity magnetic scavenging once.

[0071] Grinding Test of Plan 1

[0072] Take 200 grams of samples, grind for 40 minutes, conduct fineness detection, with over 90% passing 400 mesh. Then take another 200 grams of samples, grind for 40 minutes, and separately conduct high-gradient magnetic separation using a Slon-100 magnetic separator. After that, the magnetic concentrate is further separated by an SL-400 centrifuge once. The separation results are as follows in the table:

[0073]

[0074] Judging from the change in grade, there is almost no change in the heavy concentrate and heavy tailings of the centrifuge, which also indicates that the centrifuge separation in this plan has no effect. Without using the centrifuge, the yield of garnet is 25.19%, the grade of garnet reaches 74.41%, and the recovery rate is only 47.08%.

[0075] Centrifuge Test of Plan 2

[0076] Take two 400-gram samples and conduct two-stage separation using an SL-400 centrifuge. Combine the two heavy concentrates and heavy tailings respectively. The heavy concentrate is filtered and dried by suction, and for the heavy tailings, take 200 grams of samples after suction filtration and grind for 40 minutes with a fineness of over 90% passing 400 mesh. The test results are as follows in the table:

[0077]

[0078] Judging from the data of this plan, although the grades of garnet of the two grades are not as good as those in Plan 1, it should be no problem to use them as wear-resistant materials or as adsorption materials after activation. The total yield of garnet reaches 30.95 + 7.54 = 38.49%, and the recovery rate reaches 49.67 + 13.10 = 62.77%, which is much higher than 47.08% in Plan 1.

[0079] The two plans are compared, and we decide to adopt Plan 2. First, all the remaining 500 kg of samples are separated by a 1.2T high-gradient high-intensity magnetic separator. Use 40 kg per group, stir for half an hour, and feed and separate for 40 minutes. During the separation process, small samples are also taken for analysis and comparison. The results are as follows in the table:

[0080]

[0081] There is not much difference. In three days, I did 4 sets on the first two days and 4 and a half sets on the third day.

[0082] In the subsequent pilot analysis, the yield and recovery rate should be the average results of two samplings in the pilot process to be more reasonable, that is, the yield is (48.5%+48.28%) / 2=48.39%, and the recovery rate is (73.32%+71.55%) / 2=72.44%.

[0083] Centrifuge sorting test

[0084] The total weight of 1.2TK ore samples is 234 kg (including water). Each group of samples is about 19 kg. It is planned to make 12 groups. Water is added to make the slurry with a concentration of 20%. The feeding time is about one and a half minutes.

[0085] 1. Determination of centrifuge speed. According to the speed of the small test centrifuge, the speed of the SL-800 centrifuge is calculated. The frequency should be 45 Hz, and the rinse water is 15.6 liters / minute. First do a group of pilot tests, the results are as follows:

[0086]

[0087] From this result, it can be seen that the yield of heavy sperm is too high. Then three more groups were done. From the amount of heavy sperm and heavy tail in these three groups, it is obvious that the amount of heavy sperm is still too high.

[0088] 2. The centrifuge speed was adjusted to 41 Hz, and the rinse water volume was adjusted to 18 L / min. Then 5 groups were made. After the solid-liquid separation of the heavy concentrate and heavy tail, a rough weighing measurement was performed. The heavy concentrate yield was still about 80%, and the heavy tail was only 20%.

[0089] 3. There were only 4 groups of samples left in the afternoon. The centrifuge speed was adjusted to 39 Hz, the rinse water volume was 18 liters / minute, and after the final solid-liquid separation, the wet weight of the 4 groups of heavy tail hair was 9.8 kg. The yield did not change much.

[0090] During the 12 centrifuge tests, although no small samples were taken for testing and analysis, the sample volume of heavy concentrate and heavy tailings met the requirements of the pilot test. Finally, sampling was carried out during the 0.6T high gradient strong magnetic test. The samples showed that the heavy tailing grade was slightly lower than the previous small test grade, which also met the requirements of the pilot test. The total iron content of the process test was only 10.08%, the pilot test was 10.37%, and the small test was 11.74%, indicating that the sorting effect of the large centrifuge is better than that of the small centrifuge.

[0091] In order to comprehensively verify the results of this experiment, the Engineering Research Center conducted X-ray diffraction qualitative and quantitative analysis on the garnet products and by-products of this purification experiment to further determine the garnet content in the products. The specific test results are shown in the table below, in percentage:

[0092]

[0093] Figure 17 It is a bar chart of X-ray diffraction results. In the figure, each group of bar charts from left to right represents 1.2T tailings, heavy concentrate, 0.6T concentrate and 0.6T tailings in turn.

[0094] From the garnet content of the randomly selected samples during the comparative test, it can be seen that the garnet content in the X-ray diffraction results is 2.00 - 2.48 percentage points lower than the garnet content converted from the TFe content in the randomly selected samples. Through the analysis of the mineral chemical composition, it can be known that the randomly selected samples were tested for the total iron content, including the iron content in all other iron-containing minerals except garnet, resulting in a higher converted garnet content.

[0095] The comparison table of the garnet content in the X-ray diffraction report and the garnet content in the test randomly selected samples is as follows, with the unit being percentage:

[0096]

[0097] Figure 18 It is a bar chart for comparing the garnet content between X-ray diffraction and conversion from randomly selected samples.

[0098] In summary, through the qualitative and quantitative analysis of garnet and other minerals in the product by X-ray diffraction, it can be seen that the effect of this test work is good, and the established test objectives are basically achieved.

[0099] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0100] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific embodiments described. Obviously, many modifications and variations can be made according to the content of this specification. These embodiments are selected and specifically described in this specification to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and utilize the present invention well. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. A gravity separation device for copper tailings, comprising a screening cylinder (1) and a stirring member (2) arranged inside the screening cylinder (1), characterized in that: The ore screening cylinder (1) includes a screening and washing part (101) and an ore discharging part (102). The screening and washing part (101) and the ore discharging part (102) are integrally formed. A slag leakage hole (3) is provided at the bottom of the screening and washing part (101), and a plugging member (4) for plugging the slag leakage hole (3) is provided at the bottom of the screening and washing part (101). A stirring motor (5) is provided at the top of the ore discharging part (102) through a fixing member. The end of the output shaft of the stirring motor (5) is connected to a ore screening control assembly. The ore screening control assembly drives the stirring member (2) to rotate under the drive of the stirring motor (5). The stirring member (2) includes a rotating cylinder (201) and stirring blades (202). The stirring blades (202) are fixedly connected to the surface of the rotating cylinder (201), and the ore screening control assembly is connected to the inside of the rotating cylinder (201). A concentrate solid-liquid separation assembly is provided at each output port of the ore discharging part (102). The concentrate solid-liquid separation assembly includes a concentrate separation part and a beneficiation liquid storage part. A support cylinder (6) fixedly provided at the bottom of the screening and washing part (101) is also included. The top of the support cylinder (6) is movably connected to the stirring member (2). It also includes a copper tailings grinding assembly provided inside the support cylinder (6). The copper tailings grinding assembly is provided at the bottom of the stirring member (2) and is used for grinding copper tailings particles. A beneficiation liquid circulation assembly is provided between the copper tailings grinding assembly and the stirring member (2). The copper tailings grinding assembly includes a hollow grinding member (36) and a fourth electric push rod (37). The bottom of the hollow grinding member (36) is arc-shaped and has sieve holes. The end of the output shaft of the fourth electric push rod (37) is fixedly connected to the surface of the hollow grinding member (36). A support plate (39) is fixedly connected inside the support cylinder (6). A grinding motor (40) is fixedly connected to the upper surface of the support plate (39). The end of the output shaft of the grinding motor (40) is fixedly connected to the surface of the fourth electric push rod (37). The support cylinder (6) is connected to the rotating cylinder (201) through a second sealing bearing. The beneficiation liquid circulation assembly includes a suction pipe (38) and a sleeve pipe (41). One end of the suction pipe (38) is fixedly penetrated into the inside of the hollow grinding member (36). The other end of the suction pipe (38) is movably inserted into the inside of the sleeve pipe (41). The sleeve pipe (41) is fixedly connected to an annular plate (42). The annular plate (42) is connected to the inner wall of the support cylinder (6) and the surface of the support plate (39) through a first sealing bearing. A fixed pipe (43) is fixedly connected to the top of the support plate (39). The other end of the fixed pipe (43) fixedly penetrates the support cylinder (6). A first solenoid valve (44) is fixedly connected inside the fixed pipe (43). A second electromagnetic valve (45) is fixedly connected to the interior of the rotating cylinder (201), a circulation pipe (46) is fixedly connected to the interior of the rotating cylinder (201), the top end of the circulation pipe (46) is fixedly connected to a liquid pump (47), the output port of the liquid pump (47) is fixedly connected to a liquid outlet pipe (48), and the surface of the liquid outlet pipe (48) is fixedly connected to a third electromagnetic valve (49); A fourth solenoid valve (50) is fixedly connected to the surface of the rotating cylinder (201).

2. The gravity separation equipment for copper tailings according to claim 1, characterized in that: The concentrate separation component comprises a screen cloth (7), a driving roller (8) and a driven roller (9), both ends of the driving roller (8) and the driven roller (9) are connected to a gear box, one of the gear boxes is drivingly connected to a rotating motor (10), the screen cloth (7) is drivingly connected to the driving roller (8) and the driven roller (9), two extrusion rods (11) are also drivingly connected between the two gear boxes, the screen cloth (7) passes through the two extrusion rods (11), and the gear box is fixedly connected to the bottom of the ore discharge part (102); The mineral processing liquid storage component comprises a liquid storage tank (12), the liquid storage tank (12) is fixedly connected to the bottom of the gear box, the surface of the liquid storage tank (12) is fixedly connected to a guide inclined frame (13), the surface of the guide inclined frame (13) is fixedly connected to a scraper (14), and the surface of the scraper (14) is connected to the surface of the screen cloth (7).

3. The gravity separation equipment for copper tailings according to claim 2, characterized in that: The ore screening control assembly comprises a connecting pipe (15) and an electromagnetic block (16); the connecting pipe (15) is fixedly connected to the output shaft of the stirring motor (5); the surface of the electromagnetic block (16) is connected to the inner wall of the connecting pipe (15); the electromagnetic block (16) is fixedly connected to the surface of a first electric push rod (17); the first electric push rod (17) is movably arranged on the top of the rotating cylinder (201); and the output shaft of the first electric push rod (17) movably penetrates the rotating cylinder (201) and extends to the interior of the rotating cylinder (201); A rubber ring (18) is provided at the top of the inner wall of the rotating cylinder (201) via an extension tube, and the inner wall of the rubber ring (18) is movably connected to the surface of the output shaft of the first electric push rod (17); The screening control assembly further comprises two adjustment controls, the adjustment controls comprising a circular ring (19) and a special-shaped toothed flap (20) fixedly connected to the inside of the circular ring (19); the circular ring (19) is fixedly connected to the inside of the rotating cylinder (201); the end of the output shaft of the first electric push rod (17) is fixedly connected to a rotating ring (21); the surface of the rotating ring (21) is connected to a toggle member via a torsion spring; the toggle member comprises a toggle portion (22) and a rotation-stopping portion (23); the toggle portion (22) and the rotation-stopping portion (23) are integrally formed; the connection between the toggle portion (22) and the rotation-stopping portion (23) is movably sleeved on the surface of the rotating ring (21); and the torsion spring is arranged at the connection between the toggle portion (22) and the rotation-stopping portion (23).

4. The gravity separation equipment for copper tailings according to claim 3, wherein: The surface of the connecting pipe (15) is fixedly connected with an electromagnetic ring (24) through a connecting arm. The top of the rotating cylinder (201) is fixedly connected with a magnetic conducting ring (25) through a support rod. The inner side wall of the magnetic conducting ring (25) is movably connected with the surface of the electromagnetic ring (24). The top of the electromagnetic ring (24) is fixedly connected with a toothed ring (26) through a connecting column. The top of the ore discharging part (102) is fixedly connected with a second electric push rod (27). The end of the output shaft of the second electric push rod (27) is fixedly connected with a toothed block (28).

5. A gravity separation device for copper tailings according to claim 4, characterized in that: The bottom of the rotating ring (21) is connected with a third electric push rod (29) through a round rod. The end of the output shaft of the third electric push rod (29) is fixedly connected with a toothed part (30). The top of the support cylinder (6) is fixedly connected with a clamping part (31). The toothed part (30) is arranged on the top of the clamping part (31). The bottom of the liquid storage tank (12) is fixedly connected with an infusion pump (32). The output port of the infusion pump (32) is fixedly connected with an infusion pipe (33). The infusion pipe (33) is fixedly connected with an annular pipe (34). The annular pipe (34) is fixedly sleeved on the surface of the screening and washing part (101). The surface of the annular pipe (34) is fixedly connected with a flushing pipe (35). The flushing pipe (35) fixedly penetrates through the screening and washing part (101) and extends into the interior of the screening and washing part (101).

6. The gravity separation equipment for copper tailings according to claim 1, characterized in that: The surface of the hollow grinding part (36) is fixedly sleeved with a first rubber ring (51). The inside of the support cylinder (6) is fixedly connected with a second rubber ring (52). The surface of the first rubber ring (51) is movably connected with the inner side wall of the support cylinder (6). The inner side wall of the second rubber ring (52) is movably connected with the surface of the hollow grinding part (36).

7. A gravity separation process for copper tailings, which is used for the gravity separation equipment for copper tailings described in any one of claims 1-6, characterized in that, Including the following steps: Inject pulp and flotation reagents into the screening and washing part (101). The stirring motor (5) drives the stirring part (2) to rotate through the screening control component to stir the pulp and flotation reagents. The light pulp floats and flows into the concentrate solid-liquid separation component through the ore discharging part (102) for solid-liquid separation. The light ore materials after solid-liquid separation are placed in a centrifuge for centrifugal gravity separation. The copper tailings grinding component grinds the precipitated pulp that sinks to the bottom of the screening and washing part (101), and the ground precipitated pulp is lifted above the screening and washing part (101) through the ore dressing liquid circulation component. After the ore dressing is completed, the rotating ring (21) contacts the regulating part located below. The stirring motor (5) starts to vibrate the rotating cylinder (201) for solid-liquid separation. The fourth solenoid valve (50) is opened, and the ore dressing liquid circulation component discharges the separated liquid from the screening and washing part (101). Regularly conduct quality inspections on the products of each step to determine the garnet content, impurity components and mineral structures. The methods for quality inspection include X-ray fluorescence spectroscopy analysis, X-ray diffraction analysis and microscopic observation. The blocking part (4) is separated from the screening and washing part (101), and the flushing pipe (35) flushes the stirring blades (202) to discharge the waste residue.

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