Integrated gold refining equipment

Abstract

The utility model relates to integrated gold refining equipment which comprises a gold dissolving device and a gold purifying device, the gold dissolving device comprises a first electrolytic bath, a first anode chamber and a first cathode chamber are arranged in the first electrolytic bath, and the bottom of the first anode chamber is hollowed to form a filter port; the filtering assembly comprises an air pump, a funnel, a filtering membrane arranged at the bottom of the funnel and a tray for supporting the filtering membrane, the funnel can be detachably connected to the filtering opening and seals the filtering opening, the air pump is provided with an air inlet end and an air outlet end, the air inlet end is located inside the funnel, and the air outlet end is located outside the funnel; the solution conveying assembly comprises a conveying pipe with one end communicated with the bottom of the funnel and the other end communicated with a gold purification device, and an Au < 3 + > solution generated in the first anode chamber is conveyed to the gold purification device through the conveying pipe for reduction; according to the utility model, the rapid separation of the anode mud and the dissolving solution is realized, the treatment efficiency of the anode mud and the recovery efficiency of impurity metals are also improved, and the working efficiency is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of gold refining equipment, in particular to an integrated gold refining equipment. Background Art

[0002] Gold has important applications in many fields such as jewelry and decoration, electronics, medical care and industry. The main methods for gold purification include solvent extraction, electrolytic refining, chloride refining and aqua regia gold extraction. Different purification processes have their specific scope of application and advantages and disadvantages. At present, electrolysis is the mainstream technology in the gold electrolytic refining industry due to its high purity, high efficiency and environmental protection. Its production capacity accounts for more than 80% of the total gold electrolytic refining capacity. During the electrolytic refining process, aqua regia is usually used to dissolve crude gold to prepare a solution containing gold ions. Certain impurities in the crude gold do not react with aqua regia and will eventually remain at the bottom of the electrolytic cell in the form of solid particles to form anode mud. As the anode mud gradually accumulates, the conductivity and electrolysis efficiency of the electrolytic cell begin to be affected, ultimately reducing gold production. Existing electrolytic cells are slow and inefficient in processing anode mud, which is not conducive to improving work efficiency. Summary of the Invention

[0003] To this end, the technical problem to be solved by the present invention is to overcome the defects of the existing technology in processing anode mud in the electrolytic cell, which are slow and inefficient, and to provide an integrated gold refining equipment, which realizes the rapid separation of anode mud and dissolving liquid, and also improves the efficiency of anode mud processing and impurity metal recovery, thereby improving work efficiency.

[0004] In order to solve the above technical problems, the utility model provides an integrated gold refining equipment, comprising:

[0005] A gold dissolving device includes a first electrolytic cell, wherein a first anode chamber and a first cathode chamber are provided inside the first electrolytic cell, and the bottom of the first anode chamber is hollowed out to form a filter port;

[0006] A filter assembly comprising an air pump, a funnel, a filter membrane disposed at the bottom of the funnel, and a tray supporting the filter membrane; the funnel is detachably connected to and seals the filter port; the air pump is provided with an air inlet and an air outlet, the air inlet being located inside the funnel and the air outlet being located outside the funnel;

[0007] The solution delivery component comprises a delivery tube with one end connected to the bottom of the funnel.

[0008] In one embodiment of the present invention, a gold purification device is further included, which includes a second electrolytic cell, wherein a second anode chamber and a second cathode chamber are provided in the second electrolytic cell, and the other end of the delivery pipe is connected to the second cathode chamber.

[0009] In one embodiment of the present invention, both the first electrolytic cell and the second electrolytic cell are provided with temperature control devices.

[0010] In one embodiment of the present invention, drainage ports are provided at the bottoms of both the first electrolytic tank and the second electrolytic tank.

[0011] In one embodiment of the present invention, a selective cation exchange membrane is provided between the first anode chamber and the first cathode chamber, and between the second anode chamber and the second cathode chamber. The selective cation exchange membrane is used to block Au 3+ Pass through.

[0012] In one embodiment of the present invention, the first anode chamber is provided with a plurality of first anode sheets, the first cathode chamber is provided with a plurality of first cathode sheets, and the number of the first anode sheets is greater than the number of the first cathode sheets; the second cathode chamber is provided with a plurality of second cathode sheets, the second anode chamber is provided with a plurality of second anode sheets, and the number of the second anode sheets is less than the number of the second cathode sheets.

[0013] In one embodiment of the present invention, the gold dissolution device further includes a first electrolytic assembly, wherein the negative electrode of the first electrolytic assembly is connected to the first cathode sheet, and the positive electrode of the first electrolytic assembly is connected to the first anode sheet; the gold purification device further includes a second electrolytic assembly, wherein the negative electrode of the second electrolytic assembly is connected to the second cathode sheet, and the positive electrode of the second electrolytic assembly is connected to the second anode sheet.

[0014] In one embodiment of the present invention, the gold dissolving device further includes an electrolyte disposed in the first electrolytic cell, and the electrolyte is configured as a mixed solution of hydrochloric acid solution and hydrogen peroxide solution.

[0015] In one embodiment of the present invention, the solution delivery component further includes a pump disposed on the delivery tube.

[0016] In one embodiment of the present invention, the first electrolytic cell is provided with slots on both sides of the filter port, the slots extending in a horizontal direction, and the funnel is provided with connecting parts on both sides, the connecting parts being connected with the slots.

[0017] In one embodiment of the present invention, the delivery pipe is configured as a PP plastic pipe.

[0018] In one embodiment of the present invention, the funnel is made of transparent high-pressure resistant glass.

[0019] The above technical solution of the utility model has the following beneficial effects compared with the prior art:

[0020] The integrated gold refining equipment described in the present invention provides a detachable funnel at the bottom of the first anode chamber, and uses the funnel to collect anode mud precipitated in the first anode chamber. The anode mud can be processed by removing the funnel, thereby improving the processing efficiency of the anode mud; a filter membrane and an air pump are provided at the bottom of the funnel, and the filter membrane is used to separate the anode mud and the dissolved liquid; the air pump is used to extract the gas inside the funnel, thereby accelerating the flow of the dissolved liquid and thus improving the filtering efficiency; the filtered dissolved liquid is quickly transported to a designated location by a solution transport component for gold reduction, thereby accelerating the rate of the reduction reaction and improving the refining efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to make the content of the present invention more clearly understood, the present invention is further described in detail below based on the specific embodiments of the present invention and in conjunction with the accompanying drawings, wherein

[0022] Figure 1 This is a structural diagram of an integrated gold refining device in a preferred embodiment of the present utility model;

[0023] Figure 2 for Figure 1 Schematic diagram of the structure of the funnel, air pump, peristaltic pump and filter membrane of the integrated gold refining equipment shown;

[0024] Explanation of the reference numerals in the specification: 1. first electrolytic cell; 2. second electrolytic cell; 3. first electrolytic assembly; 4. first anode plate; 5. first cathode plate; 6. selective cation exchange membrane; 7. bottom plate; 8. air pump; 9. funnel; 10. peristaltic pump; 11. second electrolytic assembly; 12. second anode plate; 13. second cathode plate; 14. selective cation exchange membrane; 15. filter membrane; 16. first anode chamber; 17. first cathode chamber; 18. second anode chamber; 19. second cathode chamber. DETAILED DESCRIPTION

[0025] The present invention will be further described below with reference to the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it. However, the embodiments are not intended to limit the present invention.

[0026] Reference Figure 1 and 2 As shown, in one embodiment of the present invention, an integrated gold refining device is disclosed, which is used to complete the dissolution and refining of crude gold. The integrated gold refining device includes:

[0027] The gold dissolving device is used to dissolve the crude gold. The gold dissolving device comprises a first electrolytic cell 1, wherein a first anode chamber 16 and a first cathode chamber 17 are provided inside the first electrolytic cell 1. The crude gold undergoes an electrochemical reaction in the first anode chamber 16 to obtain Au-containing3+ 、Cu 2+ 、Fe 3+ and H + The solution, as well as impurities such as silver, platinum, mud and sand, Cu 2+ 、Fe 3+ and H + Enters the first cathode chamber 17 and is reduced to a metal element, Au 3+ Remain in the first anode chamber 16 to form AuCl4 - The solution, sediment, silver and platinum group metals in the form of chlorides are deposited to the bottom of the first anode chamber 16. In order to process and recover the impurities and to 3+ The dissolved liquid is transported to the purification device. The bottom of the first anode chamber 16 is hollowed out to form a filter port. It can be understood that the filter port is formed by removing the bottom plate 7 at the bottom of the first anode chamber 16.

[0028] The filter assembly includes an air pump 8, a funnel 9, a filter membrane 15 disposed at the bottom or inside of the funnel 9, and a tray for supporting and fixing the filter membrane 15. The sediment, silver, and platinum group metals in the form of chlorides in the first anode chamber 16 are deposited on the filter membrane 15 and the tray. 3+ The dissolved liquid passes through the filter membrane 15 and enters the interior of the funnel 9; in order to facilitate the recovery and treatment of silver element, platinum element and mud and sand, the funnel 9 can be detachably connected to the filter port and seal the filter port; to prevent leakage from the bottom of the first electrolytic cell 1, a sealing belt is further provided for the gap between the funnel 9 and the filter port; the air pump 8 is used to extract the air inside the funnel 9, accelerate the dissolved liquid in the first anode chamber 16 to enter the interior of the funnel 9, and improve the filtration efficiency. Specifically, the air pump 8 is provided with an air inlet and an air outlet, the air inlet is located inside the funnel 9, and the air outlet is located outside the funnel 9; the air pump 8 is preferably a vacuum pump; the filter membrane 15 is preferably a PTFE membrane, which has the characteristic of high reusability.

[0029] The solution delivery component includes a delivery pipe 20 with one end connected to the bottom of the funnel 9. After passing through the filter membrane 15, the dissolved liquid enters the delivery pipe 20 from the bottom of the funnel 9 and is directly transported by the delivery pipe 20 to the next process for gold purification, thereby realizing the integration of gold dissolution and refining and accelerating the working speed.

[0030] In one embodiment of the present invention, referring to Figure 1 As shown, it also includes a gold purification device, which is used to 3+ The gold purification device includes a second electrolytic cell 2, wherein the second electrolytic cell 2 is provided with a second anode chamber 18 and a second cathode chamber 19, wherein the other end of the delivery pipe 20 is connected to the second cathode chamber 19, and the Au in the first anode chamber 16 is3+ The dissolved liquid is transported to the second cathode chamber 19 through the transport pipe 20. 3+ Reduced to gold.

[0031] In one embodiment of the present invention, referring to Figure 1 As shown, the first electrolytic cell 1 and the second electrolytic cell 2 are both provided with a temperature control device, which includes a heater and a control component for accurately controlling the electrolyte temperature of the first electrolytic cell 1 and the second electrolytic cell 2 to improve the electrolysis efficiency.

[0032] In one embodiment of the present invention, referring to Figure 1 As shown, drain ports are provided at the bottom of the first electrolytic tank 1 and the second electrolytic tank 2 , and the drain ports are used to discharge the sewage generated by cleaning the first electrolytic tank 1 and the second electrolytic tank 2 and to exchange the electrolyte.

[0033] In one embodiment of the present invention, referring to Figure 1 As shown, a selective cation exchange membrane 6 is provided between the first anode chamber 16 and the first cathode chamber 17, and a selective cation exchange membrane 14 is provided between the second anode chamber 18 and the second cathode chamber 19. The selective cation exchange membranes 6 / 14 are used to block Au 3+ pass through, while allowing impurity metal ions such as Cu 2+ 、Fe 3+ and H + etc., passing through the first electrolytic cell 1, the first anode chamber 16 of Au 3+ The content of Au in the second electrolytic cell 2 and the second cathode chamber 19 increases because the Au content cannot pass through the selective cation exchange membrane 6 and enter the first cathode chamber 17. 3+ The content increases because it cannot pass through the selective cation exchange membrane 14 into the second anode chamber 18 .

[0034] In one embodiment of the present invention, referring to Figure 1 As shown, the first anode chamber 16 is provided with a plurality of first anode sheets connected to the positive electrode of the power supply, and the first cathode chamber 17 is provided with a plurality of first cathode sheets connected to the negative electrode of the power supply. The number of the first anode sheets is greater than the number of the first cathode sheets. After the first anode sheets and the first cathode sheets are energized, the coarse gold near the first anode sheets is oxidized and dissolved in the hydrochloric acid solution, and the Cu near the first cathode sheets is oxidized and dissolved in the hydrochloric acid solution. 2+ 、Fe 3+ and H +The particles are reduced to a single substance; the second cathode chamber 19 is provided with a plurality of second cathode sheets 13 connected to the negative pole of the power supply, and the second anode chamber 18 is provided with a plurality of second anode sheets 12 connected to the positive pole of the power supply. The number of the second anode sheets 12 is less than the number of the second cathode sheets 13. After the second anode sheets 12 and the second cathode sheets 13 are charged, the Cl near the second anode sheets 12 - The Au near the second cathode plate 13 is oxidized. 3 + The gold element is reduced and precipitated. Further, the number of the first cathode sheets is set to 2, the number of the first anode sheets is 3, the number of the second cathode sheets 13 is set to 3, and the number of the first anode sheets is 2.

[0035] In one embodiment of the present invention, referring to Figure 1 As shown, the gold dissolution device further includes a first electrolytic component, the negative electrode of the first electrolytic component is connected to the first cathode sheet, and the positive electrode of the first electrolytic component is connected to the first anode sheet, for gold dissolution and impurity metal reduction; the gold purification device further includes a second electrolytic component 11, the negative electrode of the second electrolytic component 11 is connected to the second cathode sheet 13, and the positive electrode of the second electrolytic component 11 is connected to the second anode sheet 12, for gold reduction and precipitation.

[0036] In one embodiment of the present invention, referring to Figure 1 As shown, the gold dissolving device also includes an electrolyte arranged in the first electrolytic cell 1. The electrolyte is set to a mixed solution of hydrochloric acid solution and hydrogen peroxide solution. Compared with using aqua regia as a dissolving solution, the mixed solution can effectively reduce the nitrogen oxides generated during the electrolysis process, thereby reducing air pollution.

[0037] In one embodiment of the present invention, referring to Figure 1 As shown, the solution delivery component further includes a pump disposed on the delivery pipe 20 , and the pump is used to accelerate the flow of the solution in the delivery pipe 20 and improve the purification efficiency. The pump is preferably a peristaltic pump 10 .

[0038] In one embodiment of the present invention, referring to Figure 1 As shown, in order to facilitate the extraction of the funnel 9 to clean the anode mud and recover the impurity metals therein, the first electrolytic cell 1 is provided with a card slot on both sides of the filter port, and the card slot extends in the horizontal direction. The funnel 9 is provided with a card connection portion on both sides, and the card connection portion is engaged with the card slot.

[0039] In one embodiment of the present invention, referring to Figure 1 As shown, the delivery pipe 20 is configured as a PP plastic pipe, which is flexible in arrangement and can also reduce corrosion from acid solutions.

[0040] In one embodiment of the present invention, referring to Figure 1 As shown, the funnel 9 is made of transparent high-pressure resistant glass material and can withstand the air pressure of the air pump 8.

[0041] The working principle of the integrated gold refining equipment described in this utility model is:

[0042] The crude gold is placed in the first anode chamber 16 for electrochemical reaction to obtain Au 3+ The dissolved liquid and the anode mud precipitated on the filter membrane 15, Au 3+ cannot pass through the selective cation exchange membrane 6 and accumulate in the first anode chamber 16, and Cu 2 + 、Fe 3+ Impurity metal ions such as Au can pass through the selective cation exchange membrane 6 and enter the first cathode chamber 17 to be reduced. Under the action of the air pressure of the air pump 8, the 3+ The dissolved liquid passes through the filter membrane 15 and enters the delivery pipe 20, realizing the separation of the anode mud and the dissolved liquid. Under the action of the pump pressure, the Au 3+ The dissolved solution is transported to the second cathode chamber 19 through the transport pipe 20, Au 3+ High-purity gold is obtained by reduction through the selective cation exchange membrane 14. After the electrolysis and refining are completed, the funnel 9 is pulled out, the anode mud on the filter membrane 15 is cleaned, and then pushed back to the filter port.

[0043] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. An integrated gold refining equipment, characterized in that: include, A gold dissolving device includes a first electrolytic cell, wherein a first anode chamber and a first cathode chamber are provided inside the first electrolytic cell, and the bottom of the first anode chamber is hollowed out to form a filter port; A filter assembly comprising an air pump, a funnel, a filter membrane disposed at the bottom of the funnel, and a tray supporting the filter membrane; the funnel is detachably connected to and seals the filter port; the air pump is provided with an air inlet and an air outlet, the air inlet being located inside the funnel and the air outlet being located outside the funnel; The solution delivery component comprises a delivery tube with one end connected to the bottom of the funnel.

2. The integrated gold refining equipment according to claim 1, characterized in that: It also includes a gold purification device, which includes a second electrolytic cell, in which a second anode chamber and a second cathode chamber are provided, and the other end of the delivery pipe is connected to the second cathode chamber.

3. The integrated gold refining equipment according to claim 2, characterized in that: The first electrolytic tank and the second electrolytic tank are both provided with temperature control devices.

4. The integrated gold refining equipment according to claim 2, characterized in that: The bottoms of the first electrolytic tank and the second electrolytic tank are both provided with drainage ports.

5. The integrated gold refining equipment according to claim 2, characterized in that: A selective cation exchange membrane is provided between the first anode chamber and the first cathode chamber, and between the second anode chamber and the second cathode chamber. The selective cation exchange membrane is used to block Au 3+ Pass through.

6. The integrated gold refining equipment according to claim 2, characterized in that: The first anode chamber is provided with a plurality of first anode sheets, the first cathode chamber is provided with a plurality of first cathode sheets, and the number of the first anode sheets is greater than the number of the first cathode sheets; the second cathode chamber is provided with a plurality of second cathode sheets, the second anode chamber is provided with a plurality of second anode sheets, and the number of the second anode sheets is less than the number of the second cathode sheets.

7. The integrated gold refining equipment according to claim 6, characterized in that: The gold dissolution device also includes a first electrolytic component, the negative electrode of the first electrolytic component is connected to the first cathode plate, and the positive electrode of the first electrolytic component is connected to the first anode plate; the gold purification device also includes a second electrolytic component, the negative electrode of the second electrolytic component is connected to the second cathode plate, and the positive electrode of the second electrolytic component is connected to the second anode plate.

8. The integrated gold refining equipment according to claim 1, characterized in that: The gold dissolving device further includes an electrolyte disposed in the first electrolytic cell, wherein the electrolyte is a mixed solution of hydrochloric acid solution and hydrogen peroxide solution.

9. The integrated gold refining equipment according to claim 1, characterized in that: The solution delivery component further includes a pump arranged on the delivery pipe.

10. The integrated gold refining equipment according to claim 1, characterized in that: The first electrolytic cell is provided with clamping slots on both sides of the filter port, and the clamping slots extend in a horizontal direction. The funnel is provided with clamping parts on both sides, and the clamping parts are clamped with the clamping slots.

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