An agitated leach tank apparatus for ore slurries

Abstract

The application discloses a kind of ore pulp stirring leaching tank equipment, including cathode leaching tank and anode leaching tank, middle tank is arranged between cathode leaching tank and anode leaching tank;Cathode leaching tank is separated by first membrane assembly between cathode leaching tank and middle tank;Anode leaching tank is separated by second membrane assembly between anode leaching tank and middle tank;Filter cloth is arranged between second membrane assembly and anode leaching tank;Cathode electrolytic column is arranged in cathode leaching tank;Anode electrolytic plate and agitator are arranged in anode leaching tank;Anode leaching tank is cylindrical, and its bottom end is provided with conical bottom;Anode electrolytic plate is annular, and is coaxially arranged with anode leaching tank, and agitator is located at the annular center position of anode electrolytic plate.The middle tank is arranged between cathode leaching tank and anode leaching tank, and forms a filter cloth double-membrane three-tank structure with first membrane assembly, second diaphragm assembly and filter cloth;Meanwhile, the conical bottom can make the ore pulp at the bottom of anode leaching tank gather to the center of conical bottom, so that the ore pulp can be fully stirred.

Description

Technical Field

[0001] This invention relates to the field of hydrometallurgical equipment technology, and in particular to a slurry stirring leaching tank device. Background Technology

[0002] The slurry leaching tank is a method used in mineral processing to leach conventionally difficult-to-process ores, generally for leaching low-grade metal ores such as copper. Currently, most slurry leaching operations still use the traditional single-filter-cloth double-tank method. The configuration and measurement method of the slurry leaching tank are as follows: cathodic leaching tank, anodic leaching tank, filter cloth, agitator, and external power supply. Electrolytic separation is achieved by the electrolytic oxidation-reduction reaction of different ions in the slurry, which are adsorbed onto the electrolytic plate and separated. Cations migrate to the cathodic leaching tank, where partial electrodeposition yields the metal product.

[0003] For example, patent application CN93105469.9 discloses a suspension electrolytic cell for producing zinc from zinc sulfide ore by electrolysis, including a furan fiberglass tank, an inlet pipe, a membrane frame overflow pipe, an anode chamber, and a cathode chamber. An ion exchange anion membrane is used as a diaphragm between the cathode chamber and the anode chamber, and a jet agitator is provided at the bottom of the anode chamber.

[0004] However, traditional slurry leaching tanks have several shortcomings in use: ① Traditional slurry leaching tanks use a single filter cloth and dual tanks, with anions and cations migrating non-selectively to the anode and cathode electrodes respectively, resulting in low cation concentration in the leaching tank and low leaching efficiency; many metal cations migrate to the cathode, leading to poor cathode product quality; ② In traditional slurry leaching tanks, the agitation can easily create dead zones, resulting in insufficient slurry mixing; ③ The electrolysis plates in traditional slurry leaching tanks are square, failing to obstruct the agitator's mixing of the slurry, resulting in ineffective contact and reduced leaching efficiency. Therefore, using traditional slurry leaching tanks will result in incomplete leaching, affecting actual leaching and normal production on site. Summary of the Invention

[0005] The main objective of this invention is to provide a mineral slurry stirring leaching tank device, which aims to solve the above-mentioned technical problems.

[0006] To achieve the above objectives, the present invention proposes a slurry stirring leaching tank device, including a cathode leaching tank and an anode leaching tank, with an intermediate tank provided between the cathode leaching tank and the anode leaching tank;

[0007] The cathode leaching tank and the intermediate tank are separated by a first membrane module;

[0008] The anolyte leaching tank and the intermediate tank are separated by a second membrane module; a filter cloth is provided between the second membrane module and the anolyte leaching tank;

[0009] A cathode electrolysis column is installed in the cathode leaching tank; an anode electrolysis plate and a stirrer are installed in the anode leaching tank.

[0010] The anolyte leaching tank is cylindrical with a conical bottom; the anolyte electrolysis plate is annular and coaxially arranged with the anolyte leaching tank; and the stirrer is located at the center of the annular ring of the anolyte electrolysis plate.

[0011] Preferably, it also includes a water pump, the water pump's pumping pipe extending into the tank solution in the cathode leaching tank, and the water pump's outlet end connected to the conical bottom of the anode leaching tank via a return pipe.

[0012] Preferably, there are multiple cathode electrolysis columns, and a flow guide tube is provided on the outside of each cathode electrolysis column. The flow guide tube has a hollow structure with open top and bottom. The outer peripheral surface of the cathode electrolysis column and the inner wall surface of the flow guide tube are spaced apart to form a flow guide channel. The lower end of the flow guide tube is spaced apart from the bottom wall of the cathode leaching tank. The water inlet end of the water pump is higher than the top of the flow guide tube.

[0013] Preferably, multiple bayonets are evenly distributed at the opening of the anolyte leaching tank; multiple "L"-shaped brackets are evenly distributed on the top of the anolyte electrolysis plate; the crossbars of the brackets overlap the bayonets; an anode contact plate is provided in one of the bayonets; the anode contact plate is connected to a power source through a wire; the anode contact plate is in contact with the bracket and electrically connected.

[0014] Preferably, a hanging rod is provided at the top of the cathode electrolysis column; a hanging hole is provided at the upper part of the cathode leaching tank; both ends of the hanging rod are inserted into the hanging hole; a cathode contact plate is provided in one of the hanging holes; the cathode contact plate is in contact with the hanging rod and electrically connected; the cathode contact plate is connected to the power supply through a wire; and the top of the guide tube is connected to the hanging rod.

[0015] Preferably, a first groove is provided on the bottom wall of the cathode leaching tank, and a first discharge port is provided at the first groove.

[0016] Preferably, a second groove is provided on the bottom wall of the intermediate trough; a second discharge port is provided at the second groove.

[0017] Preferably, a third groove is provided on the bottom wall of the conical bottom; a third discharge port is provided at the third groove.

[0018] Preferably, a first vertical groove is provided on the side wall at the connection position between the cathode leaching tank and the intermediate tank; the first membrane assembly is slidably installed in the first vertical groove.

[0019] Preferably, a second vertical slide groove is provided on the front and rear side walls of the intermediate tank near the anode leaching tank, and the second membrane assembly can be slidably installed in the second vertical slide groove.

[0020] Due to the adoption of the above technical solution, the beneficial effects of the present invention compared with the prior art are as follows:

[0021] (1) The present invention provides a middle tank between the cathode leaching tank and the anode leaching tank, and together with the first membrane assembly, the second diaphragm assembly and the filter cloth, forms a filter cloth double-mold three-tank structure. It makes full use of the principle of filter membrane to selectively allow certain ions in the leaching tank to enter the middle tank or the cathode tank through the mold, and can also selectively allow ions in the cathode tank to enter the middle tank or the anode tank through the mold.

[0022] (2) In this invention, the anolyte leaching tank is cylindrical and has a conical bottom. There are no corner structures inside the anolyte leaching tank, and the conical bottom can cause the slurry at the bottom of the anolyte leaching tank to gather towards the center of the conical bottom, which can make the slurry fully stirred and solve the problem that the minerals at the corners of the tank cannot be effectively stirred in the traditional square tank structure. In addition, the present invention uses a ring-shaped anode electrolysis plate, and the stirrer is located at the center of the ring of the anode electrolysis plate. During stirring, interference between the stirrer and the ring-shaped anode electrolysis plate can be effectively avoided. Compared with the traditional plate structure, the ring-shaped structure can greatly increase the area of ​​the anode electrolysis plate, so that the electrolytic minerals can be effectively attached and the electrolysis time can be reduced.

[0023] (3) In this invention, by setting up a water pump and using a return pipe to connect the anode leaching tank, the liquid in the anode and cathode leaching tanks is circulated, thereby increasing the electrolysis efficiency. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0025] Figure 1 A three-dimensional structural schematic diagram of the slurry stirring leaching tank equipment provided by the present invention;

[0026] Figure 2 This is a front view of the slurry stirring leaching tank equipment provided by the present invention;

[0027] Figure 3 A top view of the slurry stirring leaching tank equipment provided by the present invention;

[0028] Figure 4 Left view of the slurry stirring leaching tank equipment provided by the present invention;

[0029] Figure 5 This is a schematic diagram of the tank liquid circulation in the slurry stirring leaching tank equipment provided by the present invention.

[0030] Reference numerals: 1. Cathode leaching tank; 1-1. Hanging hole; 1-2. First groove; 2. Middle tank; 2-1. Second groove; 3. Anode leaching tank; 3-1. Bayonet; 4. First discharge port; 5. Second discharge port; 6. Third discharge port; 7. First membrane module; 8. Second membrane module; 9. Cathode electrolysis column; 10. Anode electrolysis plate; 10-1. Hanger; 11. Conical bottom; 11-1. Third groove; 12. Water pump; 13. Agitator; 14. External power supply; 15. Anode electrode plate; 16. Cathode electrode plate; 17. Filter cloth; 18. First vertical chute; 19. Second vertical chute; 20. Return pipe. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0032] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0033] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0034] Combination Figures 1 to 5As shown, this invention provides a slurry stirring leaching tank device, including a cathode leaching tank 1 and an anode leaching tank 3, with a middle tank 2 disposed between the cathode leaching tank 1 and the anode leaching tank 3; the cathode leaching tank 1 and the middle tank 2 are separated by a first membrane assembly 7; the anode leaching tank 3 and the middle tank 2 are separated by a second membrane assembly 8; a filter cloth 17 is disposed between the second membrane assembly 8 and the anode leaching tank 3; a cathode electrolysis column 9 is disposed in the cathode leaching tank 1; an anode electrolysis plate 10 and a stirrer 13 are disposed in the anode leaching tank 3; the anode leaching tank 3 is cylindrical, with a conical bottom 11 at its bottom end; the anode electrolysis plate 10 is annular and coaxially disposed with the anode leaching tank 3, and the stirrer 13 is located at the center of the annular ring of the anode electrolysis plate 10.

[0035] A middle tank 2 is provided between the cathode leaching tank 1 and the anolyte leaching tank 3. Together with the first membrane module 7, the second diaphragm module 8, and the filter cloth 17, it forms a one-filter-cloth-double-membrane-three-tank structure. This structure fully utilizes the principle of membrane filtration, selectively allowing certain ions from the anolyte leaching tank 3 to pass through the membrane module into the middle tank 2 or the cathode leaching tank 1, and vice versa. Specifically, the use of the second membrane module 8 selectively allows certain ions from the anolyte leaching tank 3 to transfer to the middle tank 2, reducing the migration of certain cations, increasing the oxidation potential during leaching, and thus improving leaching efficiency. Furthermore, the use of the first membrane module 7 selectively allows certain ions from the middle tank 2 to enter the cathode leaching tank 1, improving the quality of the cathode product. The filter cloth 17 reduces the impact of slurry agitation on the membrane. Higher quality electrowinning products can be obtained in the cathode leaching tank 1, while electrolytic products can be obtained in the anolyte leaching tank 3.

[0036] The bottom of the anodic leaching tank 3 is formed by a conical opening structure with a conical bottom 11, which allows the slurry to be fully stirred and reduces the ineffective stirring of minerals at the edges of the tank. The open cylindrical anodic electrolysis plate 10 effectively increases the electrolysis plate area, allowing the electrolytic minerals to adhere effectively and reducing the electrolysis time.

[0037] Combination Figure 1 As shown, the slurry stirring leaching tank equipment also includes a water pump 12. The water pump 12's pumping pipe extends into the tank solution in the cathode leaching tank 1, and the water outlet of the water pump 12 is connected to the conical bottom 11 of the anodic leaching tank 3 via a return pipe 20. By utilizing the water pump 12 and the return pipe 20, the rate of ion transfer from the anodic leaching tank 3 to the cathode leaching tank 1 in the slurry is increased, thereby increasing the electrolysis efficiency.

[0038] Furthermore, there are multiple cathode electrolysis columns 9, and a guide tube is provided on the outside of each cathode electrolysis column 9. The guide tube has a hollow structure with open top and bottom. The outer circumferential surface of the cathode electrolysis column 9 and the inner wall surface of the guide tube are spaced apart to form a flow channel. The lower end of the guide tube is spaced apart from the bottom wall of the cathode leaching tank 1. The water inlet end of the pump 12 is positioned higher than the top of the guide tube. Through this structure, under the action of the pump 12, the slurry in the cathode leaching tank 1 can flow from bottom to top through the flow channel between the cathode electrolysis column 9 and the guide tube, increasing the ion flow rate.

[0039] Combination Figure 1 As shown, multiple bayonets 3-1 are evenly distributed at the opening of the anolyte leaching tank 3; multiple "L"-shaped brackets 10-1 are evenly distributed on the top of the anolyte electrolysis plate 10; the crossbars of the brackets 10-1 overlap the bayonets 3-1; an anode contact plate 15 is provided in one of the bayonets 3-1; the anode contact plate 15 is connected to the power supply 14 through a wire; the anode contact plate 15 is in contact with the bracket 10-1 and electrically connected. The anolyte electrolysis plate 10 is directly hung on the bayonets 3-1 of the anolyte leaching tank 3 via the brackets 10-1, which is convenient for installation and easy to remove from the anolyte leaching tank 3.

[0040] Combination Figure 1 As shown, a hanging rod 9-1 is provided at the top of the cathode electrolysis column 9; a hanging hole 1-1 is provided at the upper part of the cathode leaching tank 1; both ends of the hanging rod 9-1 are inserted into the hanging hole 1-1; a cathode contact plate 16 is provided in one of the hanging holes 1-1; the cathode contact plate 16 is in contact with the hanging rod 9-1 and electrically connected; the cathode contact plate 16 is connected to the power supply 14 through a wire; the top of the guide tube is connected to the hanging rod 9-1. The structure of the hanging rod 9-1 and the hanging hole 1-1 is convenient for installation and easy for replacing the cathode electrolysis column 9.

[0041] Combination Figure 1As shown, a first groove 1-2 is provided on the bottom wall of the cathode leaching tank 1, and a first discharge port 4 is provided at the first groove 1-2. A second groove 2-1 is provided on the bottom wall of the intermediate tank 2; a second discharge port 5 is provided at the second groove 2-1. A third groove 11-1 is provided on the bottom wall of the conical bottom 11; a third discharge port 6 is provided at the third groove 11-1. Discharge ports are provided on the cathode leaching tank 1, the intermediate tank 2, and the conical bottom 11 to facilitate the discharge of some ions or precipitates from the corresponding tanks. At the same time, by providing grooves at the bottom of the corresponding tanks, some ions or precipitates on the bottom wall of the tank are concentrated in the grooves, improving the discharge effect. The second discharge port 5 at the bottom of the intermediate tank 2 can be used to remove some ions or precipitates, reduce the impact of some ions on electrolysis or electrodeposition, increase electrolysis efficiency, achieve selective slurry electrolysis, and also improve the quality of cathode electrodeposition products.

[0042] Combination Figure 1 A first vertical sliding groove 18 is provided on the side wall at the connection position between the cathode leaching tank 1 and the intermediate tank 2; the first membrane assembly 7 is slidably installed in the first vertical sliding groove 18. A second vertical sliding groove 19 is provided on the front and rear side walls of the intermediate tank 2 near the anode leaching tank 3; the second membrane assembly 8 is slidably installed in the second vertical sliding groove 19. The first membrane assembly 7 and the second membrane assembly 8 are respectively slidably installed; when replacement is needed, they can simply be pulled out from the corresponding vertical sliding groove, making the operation simple and quick.

[0043] In this invention, the first membrane module 7 and the second membrane module 8 can be made of various membranes and modules such as microfiltration membrane (MF), ultrafiltration membrane (UF), nanofiltration membrane (NF), and reverse osmosis membrane (RO), which can be used not only for mineral slurry leaching but also for water treatment.

[0044] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made under the concept of the present invention using the description and drawings of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A slurry stirring leaching tank device, comprising a cathode leaching tank (1) and an anode leaching tank (3), characterized in that: A middle tank (2) is provided between the cathode leaching tank (1) and the anode leaching tank (3); The cathode leaching tank (1) and the intermediate tank (2) are separated by a first membrane assembly (7); The anodic leaching tank (3) and the intermediate tank (2) are separated by a second membrane module (8); a filter cloth (17) is provided between the second membrane module (8) and the anodic leaching tank (3), the filter cloth (17) being used to reduce the damage to the membrane caused by the impact of slurry stirring. A cathode electrolysis column (9) is provided in the cathode leaching tank (1); an anode electrolysis plate (10) and a stirrer (13) are provided in the anode leaching tank (3). The anodic leaching tank (3) is cylindrical and has a conical bottom (11) at its bottom end; the anodic electrolysis plate (10) is annular and is coaxially arranged with the anodic leaching tank (3); the stirrer (13) is located at the center of the annular ring of the anodic electrolysis plate (10); It also includes a water pump (12), the water pump (12)’s pumping pipe extends into the tank liquid in the cathode leaching tank (1), and the water outlet of the water pump (12) is connected to the conical bottom (11) of the anode leaching tank (3) through a return pipe (20). The number of cathode electrolysis columns (9) is multiple, and a guide tube is provided on the outside of each cathode electrolysis column (9). The guide tube has a hollow structure with open top and bottom. The outer peripheral surface of the cathode electrolysis column (9) and the inner wall surface of the guide tube are spaced apart to form a guide channel. The lower end of the guide tube is spaced apart from the bottom wall of the cathode leaching tank (1). The water inlet end of the water pump (12) is higher than the top of the guide tube. Multiple bayonets (3-1) are evenly distributed at the opening of the anodic leaching tank (3); multiple "L"-shaped brackets (10-1) are evenly distributed on the top of the anodic electrolysis plate (10); the crossbars of the brackets (10-1) overlap the bayonets (3-1); an anode contact plate (15) is provided in one of the bayonets (3-1); the anode contact plate (15) is connected to the power supply (14) through a wire; the anode contact plate (15) is in contact with the bracket (10-1) and electrically connected; A hanging rod (9-1) is provided at the top of the cathode electrolysis column (9); a hanging hole (1-1) is provided at the upper part of the cathode leaching tank (1); both ends of the hanging rod (9-1) are inserted into the hanging hole (1-1); a cathode contact plate (16) is provided in one of the hanging holes (1-1); the cathode contact plate (16) is in contact with the hanging rod (9-1) and electrically connected; the cathode contact plate (16) is connected to the power supply (14) through a wire; the top of the guide tube is connected to the hanging rod (9-1); A first vertical slide groove (18) is provided on the side wall at the connection position between the cathode leaching tank (1) and the middle tank (2); the first membrane assembly (7) is slidably installed in the first vertical slide groove (18); The middle tank (2) has a second vertical slide groove (19) located on the front and rear side walls near the anode leaching tank (3), and the second membrane assembly (8) can be slidably installed in the second vertical slide groove (19).

2. The slurry stirring leaching tank equipment as described in claim 1, characterized in that: A first groove (1-2) is provided on the bottom wall of the cathode leaching tank (1), and a first discharge port (4) is provided at the first groove (1-2).

3. The slurry stirring leaching tank equipment as described in claim 1, characterized in that: A second groove (2-1) is provided on the bottom wall of the middle trough (2); a second discharge port (5) is provided at the second groove (2-1).

4. The slurry stirring leaching tank equipment as described in claim 1, characterized in that: A third groove (11-1) is provided on the bottom wall of the conical bottom (11); a third discharge port (6) is provided at the third groove (11-1).

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