A kind of acid leaching tank for zinc-containing solid waste

Abstract

The utility model discloses a zinc-containing solid waste acid leaching tank, comprising an acid leaching tank body, a sealing cover arranged on the top of the acid leaching tank body, a leaching box arranged on one inner wall of the upper end of the acid leaching tank body, a filter press box arranged on the other inner wall, a filter plate arranged in the leaching box, a corrugated cylinder arranged on the filter plate, the lower end of the corrugated cylinder fixedly connected to the upper surface of the filter plate, the upper end of the corrugated cylinder fixedly connected to the bottom surface of the sealing cover of the leaching box, a hanging seat arranged in the middle of the filter plate, a winch arranged on the sealing cover, a traction rope arranged on the drum of the winch, the free end of the traction rope passes through a through hole arranged on the sealing cover and extends into the leaching box and is fixedly connected to the hanging seat, a vertical stirring shaft is arranged in the acid leaching tank body, a plurality of stirring blades are arranged on the outer wall of the lower end of the stirring shaft, and the upper end of the stirring shaft passes through the sealing cover and is rotatably connected to a bearing seat arranged in the middle of the sealing cover. The utility model has high extraction efficiency of zinc-containing solid waste, reduces the time of the acid leaching process, is simple to operate, and has good safety.

Description

Technical Field

[0001] The utility model relates to the technical field of zinc-containing solid waste recovery equipment, in particular to an acid leaching tank for zinc-containing solid waste. Background Art

[0002] At present, the hydrometallurgical process mostly adopts the sulfuric acid leaching method, which can leach out various metal elements contained in the ore. If these metal elements cannot be recovered, it will be a huge waste, and some components in the leachate may also cause harm to the human body. For example, when leaching zinc-containing ore, a large amount of solution containing zinc sulfate will be produced. The traditional treatment method is to heat and evaporate the solution containing zinc sulfate to obtain zinc sulfate crystals. However, the disadvantages of this treatment method are high cost, low efficiency and high operating requirements. Utility Model Content

[0003] The utility model provides an acid leaching tank for zinc-containing solid waste, which solves the problems of high cost, low efficiency and high operation requirements in traditional extraction of zinc-containing solid waste.

[0004] The utility model provides an acid leaching tank for zinc-containing solid waste, comprising an acid leaching tank body, a sealing cover is arranged on the top of the acid leaching tank body, a leaching box is arranged on an inner wall of the upper end of the acid leaching tank body, a filter press box is arranged on the other inner wall, a filter plate is arranged in the leaching box, a corrugated cylinder is arranged on the filter plate, the lower end of the corrugated cylinder is fixedly connected to the upper surface of the filter plate, the upper end of the corrugated cylinder is fixedly connected to the bottom surface of the sealing cover of the leaching box, a hanging seat is arranged in the middle of the filter plate, a winch is arranged on the sealing cover, a traction rope is arranged on the drum of the winch, the free end of the traction rope passes through a through hole arranged on the sealing cover, extends into the leaching box and is fixedly connected to the hanging seat, a vertical stirring shaft is arranged in the acid leaching tank body, a plurality of stirring blades are arranged on the outer wall of the lower end of the stirring shaft, and a plurality of stirring blades are arranged on the upper end of the stirring shaft. The cover is rotatably connected with the bearing seat arranged in the middle of the cover, and a driving mechanism for driving the stirring shaft to rotate is arranged on the cover. The bottom plate of the filter press box is provided with a filter hole, and a filter press plate is arranged in the filter press box. A hydraulic cylinder is arranged on the cover above the filter press plate, and the telescopic end of the hydraulic cylinder passes through the cover and is fixedly connected with the filter press plate. A circulating pump is arranged on the top of the cover, and the circulating liquid inlet of the circulating pump is connected with one end of the upper liquid pipe, and the other end of the upper liquid pipe is inserted into the liquid of the acid leaching tank body. The circulating liquid outlet of the circulating pump is connected with the feed port arranged on the filter press plate through the infusion pipe and the corrugated pipe in turn. A discharge port is arranged on the side wall of the lower end of the filter press box and is connected with the discharge pipe. The discharge pipe passes through the side wall of the acid leaching tank body and extends to the outside, and a sealing cover is arranged at the outer end of the discharge pipe.

[0005] In the above technical scheme, further, a drain port is provided on the side wall of the lower end of the leaching box, the drain port is connected to a drain pipe, a three-way pipe joint is provided in the middle of the drain pipe, the three-way pipe joint is connected to the liquid inlet provided on the side wall of the acid leaching tank body through a liquid delivery pipe, and control valves are provided on the drain pipe, the liquid delivery pipe and the liquid delivery pipe.

[0006] In the above technical solution, further, a feeding port is arranged on the sealing cover above the leaching box, the feeding port is communicated with the inside of the corrugated cylinder, and a sealing cover is arranged on the feeding port.

[0007] In the above technical solution, further, a feeding port is arranged on the cover, and an exhaust port is arranged on one side of the feeding port and connected to an exhaust pipe.

[0008] In the above technical solution, further, a filter cloth is arranged on the bottom plate of the filter press box.

[0009] In the above technical solution, further, an annular groove is arranged on the side surface of the filter press plate along the circumferential direction, and an O-ring is arranged in the annular groove.

[0010] It can be seen from the above technical solutions that the utility model provides an acid leaching tank for zinc-containing solid waste.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] The utility model sequentially performs neutral leaching and acid leaching on zinc-containing solid waste through a leaching box, converts zinc in the solid waste into zinc ions, drives the drum to rotate and retract the traction rope through a winch, so that the filter plate drives the zinc-containing solid waste to move up and down, so that the zinc-containing solid waste is fully contacted with the leaching liquid for leaching, and the zinc ion leaching rate in the zinc-containing solid waste is high. After the neutral leaching is completed, the neutral leaching liquid is discharged, and then sulfuric acid is added to the zinc-containing solid waste for acid leaching. After the acid leaching is completed, the sulfuric acid-containing zinc acid leaching liquid is discharged into the acid leaching tank body, and the calcium hydroxide is used to leach the zinc ions. The calcium sulfate as a seed reacts with the acidic leaching solution in the acid leaching tank body to generate calcium sulfate precipitation and zinc hydroxide precipitation. During the reaction, the stirring shaft is driven by a driving mechanism to drive the stirring blades to accelerate the reaction speed. At the same time, the precipitate is fully mixed with the acidic leaching solution. Then, the mixture of the precipitate and the acidic leaching solution is pumped into the filter press box through a circulating pump. The filter press plate is driven by a hydraulic cylinder to quickly separate the solid and liquid in the mixed solution. The extraction efficiency of zinc-containing solid waste is high, the time of the acid leaching process is reduced, the safety is good, and the operation is simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solution of the utility model, the following is a brief introduction to the drawings required for use in the implementation cases. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0014] Figure 1 This is a schematic diagram of the overall structure of an acid leaching tank for zinc-containing solid waste proposed by the utility model;

[0015] Figure 2 This is a cross-sectional schematic diagram of the internal structure of a leaching box of a zinc-containing solid waste acid leaching tank proposed by the utility model;

[0016] Figure 3 The utility model provides a schematic cross-sectional view of the internal structure of a filter press box for a zinc-containing solid waste acid leaching tank.

[0017] In the figure:

[0018] 1- acid leaching tank body; 11- cover; 12- stirring shaft; 13- stirring blade; 14- bearing seat; 15- driving mechanism; 101- liquid inlet; 111- feeding port; 112- exhaust port; 113- exhaust pipe; 151- motor seat; 152- driving motor; 153- coupling;

[0019] 2-leaching box; 21-filter plate; 22-corrugated cylinder; 23-hoisting seat; 24-winding machine; 25-traction rope; 200-liquid delivery pipe; 201-liquid discharge port; 202-feeding port; 203-sealing cover;

[0020] 3-filter press box; 31-bottom plate; 32-filter press plate; 33-hydraulic cylinder; 34-circulating pump; 35-upper liquid pipe; 36-infusion pipe; 37-bellows; 38-discharge port; 39-discharge pipe; 301-filter cloth; 322-annular groove; 323-O-type sealing ring; 391-sealing cover;

[0021] 4-drain pipe; 41-control valve. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings.

[0023] Embodiment 1:

[0024] See also Figure 1-3A zinc-containing solid waste acid leaching tank comprises an acid leaching tank body 1, a sealing cover 11 is arranged on the top of the acid leaching tank body 1 for sealing the top of the acid leaching tank body 1, a leaching box 2 is arranged on an inner wall of the upper end of the acid leaching tank body 1, and a filter press box 3 is arranged on the other inner wall, the leaching box 2 is used to convert zinc in the zinc-containing solid waste into zinc ions, a filter plate 21 is arranged in the leaching box 2, a corrugated cylinder 22 is arranged on the filter plate 21, the lower end of the corrugated cylinder 22 is fixedly connected to the upper surface of the filter plate 21, the upper end of the corrugated cylinder 22 is fixedly connected to the bottom surface of the sealing cover 11 of the leaching box 2, a lifting seat 23 is arranged in the middle of the filter plate 21, a winch 24 is arranged on the sealing cover 11, a traction rope 25 is arranged on the drum of the winch 24, and the free end of the traction rope 25 passes through the filter plate 21 arranged on the sealing cover 11 The through hole of the filter press box 3 extends into the leaching box 2 and is fixedly connected to the lifting seat 23. A vertical stirring shaft 12 is arranged in the acid leaching tank body 1. A plurality of stirring blades 13 are arranged on the outer wall of the lower end of the stirring shaft 12. The upper end of the stirring shaft 12 passes through the cover 11 and is rotatably connected to a bearing seat 14 arranged in the middle of the cover 11. A driving mechanism 15 for driving the stirring shaft 12 to rotate is arranged on the cover 11. A filtering hole is arranged on the bottom plate 31 of the filter press box 3. A filter press plate 32 is arranged in the filter press box 3. A hydraulic cylinder 33 is arranged on the cover 11 above the filter press plate 32. The telescopic end of the hydraulic cylinder 33 passes through the cover 11 and is fixedly connected to the filter press plate 32. A circulating pump 34 is arranged on the top of the cover 11. The circulating liquid inlet of the circulating pump 34 is connected to one end of an upper liquid pipe 35, and the other end of the upper liquid pipe 35 is inserted into The circulating liquid outlet of the circulating pump 34 is connected to the feed port 321 arranged on the filter press plate 32 through the liquid infusion pipe 36 and the bellows 37 in turn. The discharge port 38 is arranged on the side wall of the lower end of the filter press box 3 and is connected to the discharge pipe 39. The discharge pipe 39 passes through the side wall of the acid leaching tank body 1 and extends to the outside. A sealing cover 391 is arranged on the outer end of the discharge pipe 39. The zinc-containing solid waste is subjected to neutral leaching and acid leaching in turn through the leaching box 2 to convert the zinc in the solid waste into zinc ions. The winch 24 drives its drum to rotate and retract the traction rope 25, so that the filter plate 21 drives the zinc-containing solid waste to move up and down, so that the zinc-containing solid waste is fully contacted with the leaching liquid for leaching. The zinc ion leaching rate in the zinc-containing solid waste is high. After the neutral leaching is completed, The neutral leachate is discharged, and then sulfuric acid is added to carry out acid leaching with the zinc-containing solid waste. After the acid leaching is completed, the sulfuric acid zinc acid leaching solution is discharged into the acid leaching tank body 1, and calcium hydroxide and calcium sulfate as a crystal seed react with the acid leaching solution in the acid leaching tank body 1 to generate calcium sulfate precipitation and zinc hydroxide precipitation. During the reaction, the stirring shaft 12 is driven by the driving mechanism 15 to drive the stirring blade 13 to accelerate the reaction speed. At the same time, the precipitate is fully mixed with the acid leaching solution, and then the mixture of the precipitate and the acid leaching solution is pumped into the filter press box 3 by the circulating pump 34, and the filter press plate 32 is driven by the hydraulic cylinder 33 to quickly separate the solid and liquid in the mixed solution. The extraction efficiency of the zinc-containing solid waste is high, the time of the acid leaching process is reduced, and the safety is good.

[0025] In this embodiment, see Figure 1 , 2 A drain port 201 is provided on the side wall at the lower end of the leaching box 2, and the drain port 201 is connected to the drain pipe 4. A three-way pipe joint is provided in the middle of the drain pipe 4, and the three-way pipe joint is communicated with the inner cavity of the drain pipe 4. The three-way pipe joint is connected with the liquid inlet 101 provided on the side wall of the acid leaching tank body 1 through the liquid delivery pipe 200. The drain pipe 4, the liquid delivery pipe 36, and the liquid delivery pipe 200 are all provided with a control valve 41. The control valve 41 on the drain pipe 4 is located at the end thereof and is used to control the discharge of the neutral liquid in the leaching box 2. The control valve 41 on the liquid delivery pipe 200 is used to control the introduction of the acidic leaching liquid in the leaching box 2 into the acid leaching tank body 1. The waste liquid in the acid leaching tank body 1 is discharged through the drain port provided on the side wall at the lower end thereof.

[0026] In this embodiment, see Figure 1 The driving mechanism 15 includes a motor base 151, a driving motor 152, and a coupling 153. The motor base 151 is fixed on the cover 11, and the driving motor 152 is fixed on the motor base 151. The output shaft of the driving motor 152 is connected to the upper end of the stirring shaft 12 through the coupling 153. The driving motor 152 drives the stirring shaft 12 to drive the stirring blades 13 to stir the liquid in the acid leaching tank body 1. The stirring uniformity is good, which can increase the reaction efficiency in the acid leaching tank body 1.

[0027] In this embodiment, see Figure 1 , 2 A feeding port 202 is provided on the sealing cover 11 above the leaching box 2 . The feeding port 202 is communicated with the interior of the corrugated cylinder 22 . A sealing cover 203 is provided on the feeding port 202 .

[0028] In this embodiment, see Figure 1 A feeding port 111 is arranged on the cover 11, an exhaust port 112 is arranged on one side of the feeding port 111 and connected to an exhaust pipe 113, and the exhaust pipe 113 is connected to an exhaust gas collecting pipe to purify the exhaust gas to prevent environmental pollution.

[0029] In this embodiment, see Figure 1 , 3 A filter cloth 301 is arranged on the bottom plate of the filter press box 3, and the precipitate is filtered through the filter cloth 301.

[0030] In this embodiment, see Figure 1 , 3 An annular groove 322 is arranged on the side of the filter press plate 32 along the circumferential direction, and an O-ring 323 is arranged in the annular groove 322, so that a certain pressure is formed in the leaching box 2 to accelerate the solid-liquid separation efficiency.

[0031] It can be seen from the above technical scheme that when in use, zinc-containing solid waste and water are added to the leaching box 2 through the feeding port 202, and the adding ratio is 1:5. Then, the winch 24 drives its drum to rotate and retract the traction rope 25, so that the filter plate 21 drives the zinc-containing solid waste to move up and down in the neutral leachate, so that the zinc-containing solid waste is fully in contact with the neutral leachate for leaching. The leaching time is set to 1 hour, and then the control valve 41 on the drain pipe 4 is opened to discharge the neutral leachate in the leaching box 2. After the neutral leachate is discharged, sulfuric acid is added to the leaching box 2. The concentration of sulfuric acid is 200g / L, and the solid-liquid ratio of zinc-containing solid waste to sulfuric acid is 1:3. After 6 hours of acid leaching, the control valve 41 is set on the liquid delivery pipe 200 to discharge the acidic leachate in the leaching box 2 into the acid leaching tank body 1. When the acidic leachate accumulated in the acid leaching tank body 1 After multiple batches of acidic leachate, calcium hydroxide and calcium sulfate as seed crystals are added to the acid leaching tank body 1 through the feeding port 111, and the controller controls the driving motor 152 to drive the stirring shaft 12 to drive the stirring blades 13 to stir the liquid in the acid leaching tank body 1, so that the precipitate and the acidic leachate are fully mixed. After stirring for 4 hours, the controller controls the circulating pump 34 to pump the mixture of the precipitate and the acidic leachate into the filter press box 3, and then the hydraulic cylinder 33 drives the filter press plate 32 to move downward to separate the solid and liquid in the leaching tank 2. The liquid passes through the filter cloth 301 and the bottom plate 31 and flows back to the acid leaching tank body 1. The solid precipitate is retained on the filter cloth 301. By opening the sealing cover 391 on the discharge pipe 39, the calcium sulfate precipitate and zinc hydroxide solid on the filter cloth 301 are taken out for screening.

[0032] Those skilled in the art will readily come up with other embodiments of the present invention after considering the specification and practicing the utility model disclosed herein. The present invention is intended to cover any variation, use or adaptation of the present invention, which follows the general principles of the present invention and includes common knowledge or customary technical means in the art that are not disclosed in the present invention. The specification and examples are to be regarded as exemplary only, and the true scope of the present invention is indicated by the claims.

[0033] It should be understood that the present invention is not limited to the precise structure described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The above-described embodiments of the present invention do not constitute a limitation on the scope of protection of the present invention.

Claims

1. A zinc-containing solid waste acid leaching tank, comprising an acid leaching tank body (1), characterized in that: A sealing cover (11) is arranged on the top of the acid leaching tank body (1); a leaching box (2) is arranged on one inner wall of the upper end of the acid leaching tank body (1); a filter press box (3) is arranged on the other inner wall; a filter plate (21) is arranged in the leaching box (2); a corrugated cylinder (22) is arranged on the filter plate (21); the lower end of the corrugated cylinder (22) is fixedly connected to the upper surface of the filter plate (21); the upper end of the corrugated cylinder (22) is fixedly connected to the bottom surface of the sealing cover (11) of the leaching box (2); and a filter plate (21) is arranged in the middle of the filter plate (21). A lifting seat (23) is arranged, a winch (24) is arranged on the cover (11), a traction rope (25) is arranged on the drum of the winch (24), a free end of the traction rope (25) passes through a through hole arranged on the cover (11) and extends into the leaching box (2) to be fixedly connected with the lifting seat (23), a vertical stirring shaft (12) is arranged in the acid leaching tank body (1), a plurality of stirring blades (13) are arranged on the outer wall of the stirring shaft (12), and the upper end of the stirring shaft (12) is rotatably connected with the bearing seat (14), The cover (11) is provided with a driving mechanism (15) for driving the stirring shaft (12) to rotate; the bottom plate (31) of the filter press box (3) is provided with a filtering hole; a filter press plate (32) is provided in the filter press box (3); a hydraulic cylinder (33) is provided on the cover (11); the telescopic end of the hydraulic cylinder (33) passes through the cover (11) and is fixedly connected to the filter press plate (32); a circulating pump (34) is provided on the top of the cover (11); a circulating liquid inlet of the circulating pump (34) is connected to an upper liquid pipe (35) The upper liquid pipe (35) is connected at one end thereof, and the other end thereof is inserted into the liquid of the acid leaching tank body (1). The circulating liquid outlet of the circulating pump (34) is connected to the feed port (321) provided on the filter press plate (32) through the liquid delivery pipe (36) and the bellows (37) in sequence. A discharge port (38) is provided on the side wall of the lower end of the filter press box (3) and is connected to a discharge pipe (39). The discharge pipe (39) passes through the side wall of the acid leaching tank body (1) and extends to the outside. A sealing cover (391) is provided at the outer end of the discharge pipe (39).

2. The zinc-containing solid waste acid leaching tank according to claim 1, characterized in that: A liquid discharge port (201) is provided on the side wall at the lower end of the leaching box (2), and the liquid discharge port (201) is connected to a liquid discharge pipe (4). A three-way pipe joint is provided in the middle of the liquid discharge pipe (4), and the three-way pipe joint is connected to a liquid inlet (101) provided on the side wall of the acid leaching tank body (1) via a liquid delivery pipe (200). Control valves (41) are provided on the liquid discharge pipe (4), the liquid delivery pipe (36), and the liquid delivery pipe (200).

3. The zinc-containing solid waste acid leaching tank according to claim 1, characterized in that: A feeding port (202) is provided on the sealing cover (11) above the leaching box (2), the feeding port (202) is communicated with the interior of the corrugated cylinder (22), and a sealing cover (203) is provided on the feeding port (202).

4. The zinc-containing solid waste acid leaching tank according to claim 1, characterized in that: A feeding port (111) is provided on the sealing cover (11), and an exhaust port (112) is provided on one side of the feeding port (111) and is connected to an exhaust pipe (113).

5. The zinc-containing solid waste acid leaching tank according to claim 1, characterized in that: A filter cloth (301) is arranged on the bottom plate of the filter press box (3).

6. The zinc-containing solid waste acid leaching tank according to claim 1, characterized in that: An annular groove (322) is provided on the side surface of the filter press plate (32) along the circumferential direction, and an O-type sealing ring (323) is provided in the annular groove (322).

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