Electrolyte circulating device for silver electrolytic refining

Abstract

The utility model discloses an electrolyte circulating device for silver electrolytic refining, which comprises an electrolyte filtering box, a box body and a box cover detachably arranged on the box body, a through hole is formed in the box cover and used for being connected with an electrolytic bath, and electrolyte containing silver powder in the electrolytic bath flows into the box body through the through hole. A first water outlet, a second water outlet, a third water outlet and a water inlet are formed in the lower part of the tank body; the filter tank is detachably arranged in the box body and is positioned at the upper part of the box body; a collecting bag is arranged in the filter tank in a sleeving manner and is used for filtering electrolyte containing silver powder; the observation assembly is arranged on the box cover and used for observing the silver powder in the collection bag; one end of the electrolyte circulating assembly communicates with the first water outlet in the box body, and the other end of the electrolyte circulating assembly communicates with the electrolytic bath; a water inlet of the heat exchanger is communicated with the second water outlet in the box body, and a water outlet of the heat exchanger is communicated with the water inlet in the box body; the waste liquid treatment assembly is communicated with the third water outlet in the box body.

Description

Technical Field

[0001] The utility model belongs to the technical field of silver electrolysis devices, and particularly relates to an electrolyte circulation device for silver electrolytic refining. Background Art

[0002] At present, high-purity silver is mainly produced by electrolytic refining, with crude silver containing 90-99% silver as the anode and titanium plate or stainless steel plate as the cathode. It is electrolyzed in silver nitrate electrolyte. The silver in the crude silver dissolves into the silver nitrate electrolyte in the form of ions, and then is reduced and deposited in the form of high-purity silver powder at the cathode, and falls to the bottom of the electrolytic cell.

[0003] At present, there are three mainstream methods for disposing of silver powder at the bottom of the electrolytic cell: 1. Manual scooping of silver powder, but this process not only requires stopping the electrolysis and dismantling the cell, but also leaves a lot of silver powder residual; 2. Using a conveyor belt transport mode in a horizontal electrolytic cell, but this method is limited by the scale and complexity of the equipment and is only used in a small number of large-scale production plants; 3. Using a vertical high-current density silver electrolytic cell, the equipment leaks the silver powder from the bottom and separates the silver powder from the electrolyte through filtration, but the existing electrolytic cell is simple in design, and silver powder may be retained in the circulation filtration device, affecting the operation of the electrolyte circulation pump and failing to efficiently cool the electrolyte; at the same time, most existing electrolytic cells are black box operations, and often can only rely on experience to judge whether cleaning is needed, and lack the function of real-time observation. Utility Model Content

[0004] In view of this, some embodiments disclose an electrolyte circulation device for silver electrolytic refining, comprising:

[0005] An electrolyte filter box; the electrolyte filter box includes a box body and a box cover detachably mounted on the box body; the box cover is provided with a through hole configured to connect to an electrolytic cell, through which the electrolyte containing silver powder in the electrolytic cell flows into the box body; a first water outlet, a second water outlet, a third water outlet, and a water inlet are provided at the lower portion of the box body;

[0006] The filter tank is detachably disposed within the box body, located at the upper portion of the box body; a collection bag is provided within the filter tank; when the electrolyte containing silver powder passes through the filter tank, the silver powder is collected in the collection bag, and the electrolyte is collected in the lower portion of the box body through the collection bag;

[0007] An observation component is adapted to be arranged on the box cover and is used to observe the silver powder in the collection bag;

[0008] An electrolyte circulation assembly, one end of which is connected to the first water outlet on the box body and the other end of which is connected to the electrolytic tank, for transporting the filtered electrolyte back to the electrolytic tank;

[0009] A heat exchanger, wherein the water inlet of the heat exchanger is connected to the second water outlet on the tank body, and the water outlet of the heat exchanger is connected to the water inlet on the tank body, for cooling the filtered electrolyte;

[0010] The waste liquid treatment component is arranged to be connected to the third water outlet on the box body and is used to treat the electrolyte discarded after filtration.

[0011] In the silver powder collection and electrolyte circulation device for silver electrolytic refining disclosed in some embodiments, a first valve is provided at the connection between the through hole on the box cover and the electrolytic cell.

[0012] In some embodiments of the silver powder collection and electrolyte circulation device for silver electrolytic refining disclosed herein, 1 to 6 through holes are adapted to be opened on the box cover.

[0013] The silver powder collection and electrolyte circulation device for silver electrolytic refining disclosed in some embodiments further includes an agitator, which is adapted to be arranged in the box body located below the filter tank and is used to stir the filtered electrolyte.

[0014] In some embodiments of the silver powder collection and electrolyte circulation device for silver electrolytic refining disclosed herein, the observation component includes:

[0015] An observation window adapted to be mounted on the box cover;

[0016] The light source is matched with the observation window and is used to illuminate the internal cavity of the box body.

[0017] Some embodiments disclose a silver powder collection and electrolyte circulation device for silver electrolytic refining, wherein the electrolyte circulation component includes:

[0018] A motor, wherein a water inlet of the motor is arranged to be in communication with the first water outlet on the box body;

[0019] The water inlet of the pipe fitting is arranged to be connected with the water outlet of the motor, and the water outlet of the pipe fitting is arranged to be connected with the electrolytic cell.

[0020] Some embodiments disclose a silver powder collection and electrolyte circulation device for silver electrolytic refining, wherein the waste liquid treatment component includes:

[0021] A waste liquid collection tank, wherein the water inlet of the waste liquid collection tank is arranged to be connected to the third water outlet on the tank body;

[0022] A return filter tube, the water inlet of which is connected to the water outlet of the waste liquid collection tank;

[0023] The second valve is adapted to be arranged at the water outlet of the return filter tube.

[0024] In the silver powder collection and electrolyte circulation device for silver electrolytic refining disclosed in some embodiments, a sealing ring is provided at the connection between the box cover and the box body.

[0025] In some embodiments of the silver powder collection and electrolyte circulation device for silver electrolytic refining disclosed herein, the longitudinal cross-section of the box cover is triangular.

[0026] In some embodiments of the silver powder collection and electrolyte circulation device for silver electrolytic refining disclosed herein, the box cover is composed of multiple hinged cover plates, and each cover plate is adapted to be provided with a handle.

[0027] The silver powder collection and electrolyte circulation device for silver electrolytic refining disclosed in the embodiment of the utility model is provided with a filter tank and a collection bag to filter and separate the electrolyte containing silver powder, which can simultaneously filter the electrolyte and collect the silver powder in the electrolyte to prevent the silver powder from being retained in the electrolyte filter box; an observation component is provided to observe the amount of silver powder in the collection bag in real time, so that the collected silver powder can be transferred in time; an electrolyte circulation component is provided to transport the filtered electrolyte back to the electrolytic tank for recycling; a heat exchanger is provided to efficiently cool the electrolyte; and a waste liquid treatment component is provided to replace the waste electrolyte to further precipitate and recover the silver in the electrolyte. The silver powder collection and electrolyte circulation device for silver electrolytic refining disclosed in the embodiment of the utility model can realize the recycling of the electrolyte, cool the electrolyte, separate and collect silver powder, and reduce acid mist. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 Example 1 Schematic diagram of the structure of a silver powder collection and electrolyte circulation device for silver electrolytic refining;

[0029] Figure 2 Schematic diagram of the structure of the electrolyte filter box of Example 1;

[0030] Figure 3 Schematic diagram of the structure of the box cover of the electrolyte filter box in Example 1.

[0031] Reference numerals

[0032] 1 Electrolyte filter box 2 Electrolyzer

[0033] 3 Observation component 4 Electrolyte circulation component

[0034] 5 Heat exchanger 6 Waste liquid treatment components

[0035] 7 Filter tank 8 Collection bag

[0036] 9 Agitator 11 Tank body

[0037] 12 Box cover 13 Buckle

[0038] 21 First valve 31 Observation window

[0039] 32 Light Source 41 Motor

[0040] 42 pipe fittings 61 waste liquid collection box

[0041] 62 Return filter tube 63 Second valve

[0042] 111 First water outlet 112 Second water outlet

[0043] 113 Water inlet 114 Third water outlet

[0044] 121 through hole 122 cover

[0045] 1221 hinge 1222 handle DETAILED DESCRIPTION

[0046] The term "embodiment" is used herein specifically to describe any embodiment as "exemplary," and should not be construed as superior or preferable to other embodiments. Performance indicators in the embodiments of this application were tested using conventional testing methods in the art, unless otherwise specified. It should be understood that the terms used in this application are intended solely to describe specific implementations and are not intended to limit the disclosure herein.

[0047] Unless otherwise specified, the technical and scientific terms used herein have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs; other experimental methods and technical means not specifically specified in this application refer to experimental methods and technical means commonly used by ordinary technicians in this field.

[0048] As used herein, the terms "substantially" and "approximately" are used to describe small fluctuations. For example, they can refer to less than or equal to ±5%, such as less than or equal to ±2%, such as less than or equal to ±1%, such as less than or equal to ±0.5%, such as less than or equal to ±0.2%, such as less than or equal to ±0.1%, such as less than or equal to ±0.05%. Numerical data expressed or presented in range format herein are used for convenience and brevity only and should therefore be interpreted flexibly to include not only the values explicitly listed as the limits of the range, but also all independent values or subranges contained within the range. For example, a numerical range of "1-5%" should be interpreted to include not only the explicitly listed values of 1% to 5%, but also the independent values and subranges within the indicated range. Thus, included in this numerical range are independent values such as 2%, 3.5%, and 4%, and subranges such as 1% to 3%, 2% to 4%, and 3% to 5%, etc. This principle also applies to ranges that only list a single value. Furthermore, this interpretation applies regardless of the width of the range or the characteristics described.

[0049] Throughout this document, including in the claims, transitional terms such as "comprises," "includes," "with," "having," "contains," "involving," and "accommodating" are understood to be open-ended, meaning "including but not limited to." Only the transitional terms "consisting of" and "composed of" are closed transitional terms.

[0050] In order to better illustrate the content of this application, numerous specific details are provided in the specific examples below. It should be understood by those skilled in the art that this application can be implemented without certain specific details. In the examples, some methods, means, instruments, equipment, etc. well known to those skilled in the art are not described in detail in order to highlight the main purpose of this application.

[0051] Under the premise of no conflict, the technical features disclosed in the embodiments of the present application can be arbitrarily combined, and the resulting technical solutions belong to the contents disclosed in the embodiments of the present application. It should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like mentioned in this application indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the technical features and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention, unless it conflicts with the context. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance, unless it conflicts with the context.

[0052] In some embodiments, the electrolyte circulation apparatus for silver electrolytic refining comprises:

[0053] An electrolyte filter box; the electrolyte filter box includes a box body and a box cover detachably mounted on the box body; the box cover is provided with a through hole configured to connect to an electrolytic cell, through which the electrolyte containing silver powder in the electrolytic cell flows into the box body; a first water outlet, a second water outlet, a third water outlet, and a water inlet are provided at the lower portion of the box body;

[0054] Filter tank; the filter tank is detachably arranged in the box body, located at the upper part of the box body; a collection bag is set in the filter tank, which is used to filter the electrolyte containing silver powder. When the electrolyte containing silver powder passes through the filter tank, the silver powder is separated from the electrolyte and collected in the collection bag. The electrolyte is collected in the lower part of the box body through the collection bag; the filter tank is a groove with multiple micropores evenly distributed, which can prevent the splashing of silver powder and electrolyte. At the same time, the filter tank can also support and limit the collection bag, which can prevent the collection bag from falling or being damaged; when the collection bag is set in the filter tank, it is also fixed with screws to prevent the collection bag from moving;

[0055] An observation component is adapted to be arranged on the box cover and is used to observe the silver powder in the collection bag. The observation component can be used to observe the amount of silver powder in the collection bag in real time, so that the collection bag can be replaced in time and the collected silver powder can be transferred in time to prevent the collected silver powder from falling into the filtered electrolyte.

[0056] An electrolyte circulation assembly, one end of which is connected to the first water outlet on the box body and the other end of which is connected to the electrolytic tank, for transporting the filtered electrolyte back to the electrolytic tank;

[0057] Heat exchanger, the water inlet of the heat exchanger is connected to the second water outlet on the tank body, and the water outlet of the heat exchanger is connected to the water inlet on the tank body, for cooling the filtered electrolyte; generally, the heat exchanger is a plate cooler, a shell and tube cooler or an air-cooled cooler;

[0058] The waste liquid treatment component is connected to the third water outlet on the box body and is used to treat the discarded electrolyte after filtration. If the electrolyte is affected by excessive impurity concentration and its recycling is affected, the electrolyte will be discharged into the waste liquid treatment component for replacement treatment, and the silver ions in the electrolyte will be replaced and precipitated to achieve effective recycling of silver resources.

[0059] In some embodiments, a first valve is provided at the connection between the through hole in the box cover and the electrolytic cell. The first valve can control the flow of electrolyte containing silver powder in the electrolytic cell into the electrolyte filter box, thereby preventing excessive electrolyte flow from causing electrolyte splashing and incomplete separation of the electrolyte and silver powder.

[0060] Generally, the electrolyte filter box can be connected to multiple electrolytic cells at the same time to filter the electrolyte containing silver powder in the multiple electrolytic cells at the same time; in some embodiments, 1 to 6 through holes are adapted to be opened on the box cover.

[0061] In some embodiments, the silver powder collection and electrolyte circulation device for silver electrolytic refining further includes an agitator, which is adapted to be disposed in a box body located below the filter tank, and is used to stir the filtered electrolyte, thereby enhancing the diffusion of the electrolyte, making the temperature of the electrolyte more uniform, and reducing the cooling time.

[0062] In some embodiments, the viewing assembly comprises:

[0063] An observation window is adapted to be mounted on the box cover. Generally, the angle of the observation window allows the operator to observe the amount of silver powder in the collection bag in real time, thereby determining the replacement time of the collection bag and replacing the collection bag in time to prevent the collection bag from being overfilled with silver powder and being washed into the filtered electrolyte by the electrolyte to be filtered.

[0064] The light source is adapted to be arranged with the observation window and is used to illuminate the internal cavity of the box body, so that the operator can clearly observe the amount of silver powder collected in the collection bag arranged in the box body in a bright environment.

[0065] In some embodiments, the electrolyte circulation assembly comprises:

[0066] A motor, wherein a water inlet of the motor is arranged to be in communication with the first water outlet on the box body;

[0067] The water inlet of the pipe fitting is arranged to be connected with the water outlet of the motor, and the water outlet of the pipe fitting is arranged to be connected with the electrolytic cell.

[0068] In some embodiments, the waste treatment component comprises:

[0069] A waste liquid collection tank, wherein the water inlet of the waste liquid collection tank is arranged to be connected to the third water outlet on the tank body;

[0070] The water inlet of the foldable filter tube is connected to the water outlet of the waste liquid collection tank; the foldable filter tube can prevent flow blockage and increase filtration efficiency; the foldable filter tube is provided with a porous structure filter material filled with adsorption materials such as activated carbon, biochar, MXene, etc. with larger pore size, which can selectively filter silver in the electrolyte;

[0071] The second valve is adapted to be arranged at the water outlet of the return filter tube, and the treated waste electrolyte is discharged to a subsequent treatment process through the second valve.

[0072] In some embodiments, a sealing ring is provided at the connection between the box cover and the box body, so that an enclosed space is formed between the box body and the box cover. The enclosed space can effectively prevent the acid mist formed by the electrolyte from being discharged outward, thereby reducing environmental pollution and avoiding personal injury.

[0073] In some embodiments, the longitudinal cross-section of the box cover is triangular. When the electrolyte enters the electrolyte filter box, it may generate byproducts such as acid mist and acid gas due to sputtering and evaporation. The box cover with a triangular longitudinal cross-section allows the acid mist and acid gas to condense on the inner wall of the box cover and naturally slide down into the box body, forming an internal circulation.

[0074] In some embodiments, the box cover is composed of multiple hinged cover plates for easy disassembly, and each cover plate is adapted to be provided with a handle, through which the operator can open / close the cover plate, thereby facilitating replacement of the collection bag.

[0075] In some embodiments, the box cover is composed of four cover panels of the same size.

[0076] In some embodiments, a silver electrolytic refining system is disclosed, which includes a silver powder collection and electrolyte circulation device for silver electrolytic refining and an electrolytic cell; the electrolytic cell is used to carry out a silver electrolytic refining reaction, and the silver powder collection and electrolyte circulation device for silver electrolytic refining is used to recover and recycle the electrolyte containing silver powder after the silver electrolytic refining reaction in the electrolytic cell.

[0077] The technical details are further illustrated below with reference to embodiments.

[0078] Example 1

[0079] Figure 1 Schematic diagram of the structure of the silver powder collection and electrolyte circulation device for silver electrolytic refining disclosed in Example 1; Figure 2 This is a schematic structural diagram of the electrolyte filter box disclosed in Example 1; Figure 3 This is a schematic structural diagram of the box cover of the electrolyte filter box disclosed in Example 1.

[0080] like Figures 1 to 3 As shown, the electrolyte circulation device for silver electrolytic refining includes: an electrolyte filter box 1, the electrolyte filter box 1 includes a box body 11 and a box cover 12 detachably arranged on the top of the box body, wherein a first water outlet 111 is opened at the bottom of the left wall of the box body 11, a second water outlet 112 and a water inlet 113 are opened at the bottom of the right wall of the box body 11, a third water outlet 114 is opened on the bottom wall of the box body 11, and three through holes 121 are opened on the box cover; the three through holes 121 are respectively connected to the three electrolytic cells 2, and the connection between the electrolytic cells 2 and the through holes 121 is set The apparatus is provided with a first valve 21; an observation assembly 3 adapted to be mounted on the box cover; an electrolyte circulation assembly 4 disposed on the left side of the box body 11; a heat exchanger 5 disposed on the right side of the box body 11, the water inlet of the heat exchanger 5 being connected to the second water outlet 112 on the box body 11, and the water outlet of the heat exchanger 5 being connected to the water inlet 113 on the box body 11; a waste liquid treatment assembly 6 disposed below the box body 11; a filter tank 7 disposed in the box body 11; a collection bag 8 sleeved in the filter tank 7; and an agitator 9 disposed in the box body 11 below the filter tank 7.

[0081] The box body 11 and the box cover 12 are fixedly connected by a buckle 13. The box cover 12 is a triangular structure as a whole, which is formed by splicing four cover plates 122. The upper and lower adjacent cover plates 122 are connected by hinges 1221, and each cover plate 122 is provided with a handle 1222.

[0082] The observation component 3 includes an observation window 31 and a light source 32 arranged on the observation window 31; the electrolyte circulation component 4 includes a motor 41 and a pipe fitting 42, the water inlet of the motor 41 is arranged to be connected to the first water outlet 111 on the box body 11, the water inlet of the pipe fitting 42 is arranged to be connected to the water outlet of the motor 41, and the water outlet of the pipe fitting 42 is adapted to be connected to the electrolytic cell 2; the waste liquid treatment component 6 includes a waste liquid collection box 61 connected to the third water outlet 114, a circular filter pipe 62 arranged to be connected to the bottom of the waste liquid collection box, and a second valve 63 arranged at the lower part of the circular filter pipe 62.

[0083] When the electrolyte containing silver powder flows from the electrolytic cell 2 into the electrolyte filter box 1, it first passes through the filter tank 7 which is provided with a collection bag 8. The silver powder in the electrolyte is intercepted and deposited in the collection bag 8. The electrolyte is collected at the bottom of the electrolyte filter box body 11. At this time, the agitator 9 and the heat exchanger 5 are started to cool the electrolyte, and then the motor 41 is started to transport the cooled electrolyte in the box body 11 back to the electrolytic cell 2; when there are still a large amount of impurities in the electrolyte after filtering through the filter tank 7, it cannot be recycled and needs to be discarded, the electrolyte is passed into the waste liquid treatment component 6 to replace and precipitate the silver ions in the electrolyte.

[0084] The electrolyte circulation device for silver electrolytic refining disclosed in the embodiment of the utility model is provided with a filter tank and a collection bag to filter and separate the electrolyte containing silver powder, which can simultaneously filter the electrolyte and collect the silver powder in the electrolyte to prevent the silver powder from being retained in the electrolyte filter box. An observation component is provided to observe the amount of silver powder in the collection bag in real time, so that the collected silver powder can be transferred in time. An electrolyte circulation component is provided to transport the filtered electrolyte back to the electrolytic tank for recycling. A heat exchanger is provided to efficiently cool the electrolyte. A waste liquid treatment component is provided to replace the waste electrolyte to further precipitate and recover the silver in the electrolyte. The silver powder collection and electrolyte circulation device for silver electrolytic refining disclosed in the embodiment of the utility model can realize the recycling of the electrolyte, cool the electrolyte, separate and collect silver powder, and reduce acid mist.

[0085] The technical solutions disclosed in the present invention and the technical details disclosed in the embodiments are merely illustrative of the inventive concept of the present invention and do not constitute a limitation on the technical solutions of the present invention. Any conventional changes, replacements or combinations of the technical details disclosed in the embodiments of the present invention have the same inventive concept as the present invention and are within the scope of protection of the claims of the present invention.

Claims

1. An electrolyte circulation device for silver electrolytic refining, characterized in that: include: An electrolyte filter box; the electrolyte filter box comprises a box body and a box cover detachably mounted on the box body; the box cover is provided with a through hole configured to connect to an electrolytic cell, through which the electrolyte containing silver powder in the electrolytic cell flows into the box body; a first water outlet, a second water outlet, a third water outlet, and a water inlet are provided at the lower portion of the box body; A filter tank; the filter tank is detachably disposed within the box body, located at the upper portion of the box body; a collection bag is sleeved within the filter tank; when the electrolyte containing silver powder passes through the filter tank, the silver powder is collected in the collection bag, and the electrolyte is collected in the lower portion of the box body through the collection bag; An observation component adapted to be disposed on the box cover and used for observing the silver powder in the collection bag; an electrolyte circulation assembly, one end of which is connected to the first water outlet on the tank body and the other end of which is connected to the electrolytic tank, for transporting the filtered electrolyte back to the electrolytic tank; a heat exchanger, wherein the water inlet of the heat exchanger is arranged to communicate with the second water outlet on the tank body, and the water outlet of the heat exchanger is arranged to communicate with the water inlet on the tank body, for cooling the filtered electrolyte; The waste liquid treatment component is arranged to be in communication with the third water outlet on the box body and is used to treat the electrolyte discarded after filtration.

2. The electrolyte circulation device for silver electrolytic refining according to claim 1, characterized in that: A first valve is provided at the connection between the through hole on the box cover and the electrolytic cell.

3. The electrolyte circulation device for silver electrolytic refining according to claim 1, characterized in that: The box cover is adapted to have 1 to 6 through holes.

4. The electrolyte circulation device for silver electrolytic refining according to claim 1, characterized in that: The invention also includes an agitator, which is adapted to be arranged in the box body below the filter tank and is used to stir the filtered electrolyte.

5. The electrolyte circulation device for silver electrolytic refining according to claim 1, characterized in that: The observation component includes: An observation window adapted to be mounted on the box cover; A light source is adapted to be arranged with the observation window and is used for illuminating the internal cavity of the box body.

6. The electrolyte circulation device for silver electrolytic refining according to claim 1, characterized in that: The electrolyte circulation component comprises: a motor, wherein a water inlet of the motor is arranged to communicate with the first water outlet on the box body; A pipe fitting, wherein the water inlet of the pipe fitting is arranged to be connected to the water outlet of the motor, and the water outlet of the pipe fitting is arranged to be connected to the electrolytic cell.

7. The electrolyte circulation device for silver electrolytic refining according to claim 1, characterized in that: The waste liquid treatment component comprises: A waste liquid collection tank, wherein the water inlet of the waste liquid collection tank is arranged to be connected to the third water outlet on the tank body; A return filter tube, wherein the water inlet of the return filter tube is arranged to be connected to the water outlet of the waste liquid collection tank; The second valve is adapted to be arranged at the water outlet of the return filter tube.

8. The electrolyte circulation device for silver electrolytic refining according to claim 1, characterized in that: A sealing ring is provided at the connection between the box cover and the box body.

9. The electrolyte circulation device for silver electrolytic refining according to claim 1, characterized in that: The longitudinal section of the box cover is in the shape of a triangle.

10. The electrolyte circulation device for silver electrolytic refining according to claim 9, characterized in that: The box cover is composed of a plurality of hinged cover plates, and each cover plate is adapted to be provided with a handle.

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