A continuous leaching apparatus for recovering precious metals

Abstract

This utility model discloses a continuous leaching device for recovering rare and precious metals, relating to the field of precious metal recovery technology. It includes a fixed support, a leaching tank fixedly connected to the fixed support, a bottom cover fixedly connected to one end of the leaching tank near the fixed support, and a top cover hinged to the other end of the leaching tank away from the bottom cover. Several filter bags are placed inside the leaching tank. A first storage tank is fixedly connected to one side of the fixed support, and a collection mechanism is fixedly connected to the side of the fixed support away from the first storage tank. A pump is fixedly connected between the first storage tank and the fixed support, and the pump connects the first storage tank and the leaching tank through a pipe. This utility model sets multiple filter bags containing roasted residue inside the leaching tank. When the pump continuously pumps the leaching liquid into the leaching tank, the leaching liquid and roasted residue continuously react, achieving continuous leaching of rare and precious metals, avoiding the risks that may occur with intermittent leaching operations, and improving the safety of the leaching operation.

Description

Technical Field

[0001] This utility model relates to the field of precious metal recycling technology, specifically a continuous leaching device for recycling rare and precious metals. Background Technology

[0002] In traditional rare and precious metal recycling, after various carrier materials are removed by roasting, the residue is crushed and ground before entering the leaching stage. In this stage, the target metal or carrier metal is dissolved by acid and alkali leaching, achieving a preliminary separation effect. Existing processes generally adopt intermittent operation, that is, the roasting residue and leaching solution are added to the container at the same time, and the target component is leached by long-term soaking. Due to the influence of the distribution coefficient of the target substance in the leaching solution, the leaching effect will be worse when the content of the target metal in the leaching solution increases. It is often difficult to extract the target metal completely in one go, and multiple leachings are required to achieve the purpose of full leaching. The leaching solution uses a large amount of leaching solution and generates a lot of wastewater. Moreover, the leaching solution often uses strong acids and alkalis. Multiple intermittent leaching operations increase the risks and safety hazards in the operation process. Utility Model Content

[0003] The purpose of this invention is to provide a continuous leaching device for recovering rare and precious metals, so as to solve the problems mentioned in the background art.

[0004] To achieve the above-mentioned objectives, the present invention adopts the following technical solution: This utility model provides a continuous leaching device for recovering rare and precious metals, including a fixed support, an extraction tank fixedly connected to the fixed support, a bottom cover fixedly connected to one end of the extraction tank near the fixed support, a top cover hinged to the other end of the extraction tank away from the bottom cover, several filter bags placed inside the extraction tank, a first storage tank fixedly connected to one side of the fixed support, a collection mechanism fixedly connected to the side of the fixed support away from the first storage tank, a pump fixedly connected between the first storage tank and the fixed support, and the pump connecting the first storage tank and the extraction tank through a pipeline.

[0005] Furthermore, the collection mechanism includes a second storage tank fixedly connected to the fixed support on the side away from the first storage tank. A third storage tank is fixedly connected to the end of the second storage tank away from the fixed support. A first pipe is fixedly connected to the end of the second storage tank and the extraction tank away from the bottom cover. A second pipe is fixedly connected to the first pipe via a T-connector. The second pipe is fixedly connected to the third storage tank. A sampling tube is fixedly connected to the end of the first pipe near the extraction tank. A solenoid valve is fixedly connected to the end of the first pipe between the extraction tank and the sampling tube. A solenoid valve is fixedly connected to the end of the first pipe near the first storage tank. A solenoid valve is fixedly connected to the end of the second pipe near the third storage tank. A third pipe is fixedly connected to the lower end of the second storage tank. The third pipe is connected to the input end of the pump.

[0006] Furthermore, the input end of the pump is connected to the first storage tank via a connecting pipe, the connecting pipe is connected to the third pipe via a T-connector, a solenoid valve is fixedly connected to the end of the connecting pipe near the first storage tank, and the output end of the pump is connected to the inside of the extraction tank via a pipe.

[0007] Furthermore, the first storage tank is used to store fresh extract, the second storage tank is used to collect dilute extract, and the third storage tank is used to collect concentrated extract.

[0008] Furthermore, a tray is fixedly connected to the bottom cover, the tray is used to place the filter bag, and there is a gap between the tray and the inner wall of the extraction tank.

[0009] Furthermore, an air inlet pipe and an air outlet pipe are fixedly connected to the upper cover.

[0010] Furthermore, the pore size of the filter bag is smaller than the particle diameter of the residue.

[0011] Furthermore, the extraction tank is sealed to the top and bottom covers by a double-layer rubber ring groove.

[0012] Compared with existing technologies, one or more of the above technical solutions have the following beneficial effects: This invention sets up multiple filter bags containing calcined residue inside the leaching tank. When the pump continuously pumps the leaching liquid into the leaching tank, the leaching liquid and the calcined residue react continuously, realizing continuous leaching of rare and precious metals, avoiding the risks that may occur in intermittent leaching operations, improving the safety of leaching operations, and the setting of filter bags makes it easier to remove the subsequent residues from the leaching tank. The collection mechanism separately collects the concentrated and diluted extracts. The concentrated extract is directly used in subsequent processes, while the diluted extract will be used preferentially in the next extraction, reducing the amount of extract used and lowering costs.

[0013] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit the present invention. Attached Figure Description

[0014] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a side view of the present invention; Figure 3 yes Figure 2 Sectional view at point AA.

[0016] In the picture: 1. Fixed support; 2. Extraction tank; 3. Bottom cover; 4. Top cover; 5. Filter bag; 6. First storage tank; 7. Collection mechanism; 8. Pump; 9. Second storage tank; 10. Third storage tank; 11. First pipe; 12. Second pipe; 13. Sampling tube; 14. Third pipe; 15. Connecting pipe; 16. Support plate; 17. Air inlet pipe; 18. Discharge pipe. Detailed Implementation

[0017] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0018] Please see Figures 1 to 3 This utility model provides a continuous leaching device for recovering rare and precious metals, including a fixed support 1, an extraction tank 2 fixedly connected to the fixed support 1, a bottom cover 3 fixedly connected to one end of the extraction tank 2 near the fixed support 1, an upper cover 4 hinged to the other end of the extraction tank 2 away from the bottom cover 3, a plurality of filter bags 5 placed inside the extraction tank 2, a first storage tank 6 fixedly connected to one side of the fixed support 1, a collection mechanism 7 fixedly connected to the side of the fixed support 1 away from the first storage tank 6, a pump 8 fixedly connected between the first storage tank 6 and the fixed support 1, and the pump 8 connecting the first storage tank 6 and the extraction tank 2 through a pipe.

[0019] In the initial rare and precious metal leaching, a filter bag 5 containing roasted residue is placed in the leaching tank 2. Then, the leaching solution in the first storage tank 6 is pumped into the leaching tank 2 by the pump 8, causing the leaching solution to react with the roasted residue and extract the rare and precious metals into the leaching solution. The slender leaching tank 2 allows the leaching solution to flow at a certain speed, accelerating the contact between the leaching solution and the roasted residue above the leaching tank 2, thereby improving the leaching effect. As the leaching solution is continuously pumped into the leaching tank 2, the leaching solution and the roasted residue in the filter bag 5 continue to react, achieving continuous leaching of rare and precious metals, avoiding the risks that may occur with intermittent leaching operations, and improving the safety of the leaching operation. The leaching solution after the reaction is collected by the collection mechanism 7, which facilitates subsequent processes.

[0020] Please see Figure 1 and Figure 3 The collection mechanism 7 includes a second storage tank 9 fixedly connected to the fixed support 1 on the side away from the first storage tank 6. A third storage tank 10 is fixedly connected to the end of the second storage tank 9 away from the fixed support 1. A first pipe 11 is fixedly connected to the end of the extraction tank 2 away from the bottom cover 3. A second pipe 12 is fixedly connected to the first pipe 11 through a three-way pipe. The second pipe 12 is fixedly connected to the third storage tank 10. A sampling tube 13 is fixedly connected to the end of the first pipe 11 near the extraction tank 2. A solenoid valve is fixedly connected to the end of the first pipe 11 between the extraction tank 2 and the sampling tube 13. A solenoid valve is fixedly connected to the end of the first pipe 11 near the first storage tank 6. A solenoid valve is fixedly connected to the end of the second pipe 12 near the third storage tank 10. A third pipe 14 is fixedly connected to the lower end of the second storage tank 9. The third pipe 14 is connected to the input end of the pump 8.

[0021] Please see Figure 1 and Figure 3 The input end of the pump 8 is connected to the first liquid storage tank 6 through the connecting pipe 15. The connecting pipe 15 is connected to the third pipe 14 through the tee pipe. A solenoid valve is fixedly connected to the end of the connecting pipe 15 near the first liquid storage tank 6. The output end of the pump 8 is connected to the inside of the extraction tank 2 through the pipe.

[0022] The first storage tank 6 is used to store fresh extract, the second storage tank 9 is used to collect dilute extract, and the third storage tank 10 is used to collect concentrated extract.

[0023] During leaching, sampling is performed through sampling tube 13. When the concentration of the target metal in the leaching solution is high, the solenoid valve is controlled to allow the leaching solution flowing from the leaching tank 2 to flow through the first pipe 11 into the second pipe 12 and continuously into the third storage tank 10 to collect the concentrated leaching solution for processing. When sampling is performed through sampling tube 13 and the concentration of the target metal in the leaching solution is low, the solenoid valve is controlled to allow the leaching solution flowing from the leaching tank 2 to flow directly through the first pipe 11 into the second storage tank 9. In the next leaching operation, pump 8 prioritizes pumping the diluted leaching solution into the leaching tank 2 through the third pipe 14 and connecting pipe 15, and then uses fresh leaching solution for leaching. This allows the diluted leaching solution to react preferentially with the roasting residue, thereby extracting the target metal, reducing the amount of leaching solution used, and lowering costs.

[0024] Please see Figure 3 A tray 16 is fixedly connected to the bottom cover 3. The tray 16 is used to place the filter bag 5. There is a gap between the tray 16 and the inner wall of the extraction tank 2. The extract flows through the gap between the tray 16 and the inner wall of the extraction tank 2 to the filter bag 5 to extract the calcined residue. The tray 16 is designed to prevent the filter bag 5 from blocking the inlet of the extract, ensuring that the extract can continuously enter the extraction tank 2 and react with the calcined residue.

[0025] Please see Figure 2 The upper cover 4 is fixedly connected with an air inlet pipe 17 and an air outlet pipe 18. Compressed air enters through the air inlet pipe 17 and the gas generated by the reaction is discharged in time through the air outlet pipe 18 to avoid excessive pressure in the extraction tank 2 from affecting the extraction.

[0026] The gaps in the filter bag 5 are smaller than the particle diameter of the residue, preventing the roasting residue from leaking out of the gaps in the filter bag 5. At the same time, the filter bag 5 makes it easier to remove the residue from the extraction tank 2.

[0027] The extraction tank 2 is sealed to the upper cover 4 and the bottom cover 3 by a double-layer rubber ring groove to prevent leakage of the extraction liquid.

[0028] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A continuous leaching apparatus for the recovery of a precious metal, characterised in that, The device includes a fixed support (1), on which an extraction tank (2) is fixedly connected. A bottom cover (3) is fixedly connected to one end of the extraction tank (2) near the fixed support (1). A top cover (4) is hinged to one end of the extraction tank (2) away from the bottom cover (3). Several filter bags (5) are placed inside the extraction tank (2). A first liquid storage tank (6) is fixedly connected to one side of the fixed support (1). A collection mechanism (7) is fixedly connected to the side of the fixed support (1) away from the first liquid storage tank (6). A pump (8) is fixedly connected between the first liquid storage tank (6) and the fixed support (1). The pump (8) connects the first liquid storage tank (6) and the extraction tank (2) through a pipe.

2. A continuous leaching apparatus for recovering a precious metal according to claim 1, wherein The collection mechanism (7) includes a second liquid storage tank (9) fixedly connected to the side of the fixed support (1) away from the first liquid storage tank (6). A third liquid storage tank (10) is fixedly connected to one end of the second liquid storage tank (9) away from the fixed support (1). A first pipe (11) is fixedly connected to one end of the second liquid storage tank (9) and the extraction tank (2) away from the bottom cover (3). A second pipe (12) is fixedly connected to the first pipe (11) through a three-way pipe. The second pipe (12) is fixedly connected to the third liquid storage tank (10). A sampling tube (13) is fixedly connected to one end of the first pipe (11) near the extraction tank (2). A solenoid valve is fixedly connected to one end of the first pipe (11) between the extraction tank (2) and the sampling tube (13). A solenoid valve is fixedly connected to one end of the first pipe (11) near the first storage tank (6). A solenoid valve is fixedly connected to one end of the second pipe (12) near the third storage tank (10). A third pipe (14) is fixedly connected to the lower end of the second storage tank (9). The third pipe (14) is connected to the input end of the pump (8).

3. A continuous leaching apparatus for recovering a precious metal according to claim 2, wherein The input end of the pump (8) is connected to the first liquid storage tank (6) through the connecting pipe (15). The connecting pipe (15) is connected to the third pipe (14) through the three-way pipe. A solenoid valve is fixedly connected to one end of the connecting pipe (15) near the first liquid storage tank (6). The output end of the pump (8) is connected to the inside of the extraction tank (2) through the pipe.

4. A continuous leaching apparatus for recovering a precious metal according to claim 2, wherein The first storage tank (6) is used to store fresh extract, the second storage tank (9) is used to collect dilute extract, and the third storage tank (10) is used to collect concentrated extract.

5. A continuous leaching apparatus for recovering a precious metal according to claim 1, wherein A tray (16) is fixedly connected to the bottom cover (3). The tray (16) is used to place the filter bag (5). There is a gap between the tray (16) and the inner wall of the extraction tank (2).

6. A continuous leaching apparatus for recovering rare and precious metals according to claim 1, characterized in that, An air inlet pipe (17) and an exhaust pipe (18) are fixedly connected to the upper cover (4).

7. A continuous leaching apparatus for recovering rare and precious metals according to claim 1, characterized in that, The pores of the filter bag (5) are smaller than the particle diameter of the residue.

8. A continuous leaching apparatus for recovering a precious metal according to claim 1, wherein The extraction tank (2) is sealed to the top cover (4) and bottom cover (3) by a double-layer rubber ring groove.

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