A device for electrolytic collection of dendritic silver powder

Abstract

This utility model discloses a device for electrolytic collection of dendritic silver powder, belonging to the field of silver electrolytic refining technology. It includes a conductive beam, a conductive connector, a cathode plate, and a cathode filter device. The conductive connector is located below one end of the conductive beam, the cathode plate is located below the conductive beam, and the cathode filter device is sleeved around the cathode plate, with a gap between the inner wall of the cathode filter device and the outer wall of the cathode plate. The cathode filter device is connected to the conductive beam via a connector. This utility model simplifies the silver powder collection process and improves the silver powder collection efficiency through optimized cathode plate, conductive connector, and cathode filter device. It also significantly extends the service life of equipment components and contributes to the uniformity of the silver powder product.

Description

Technical Field

[0001] This utility model relates to the field of silver electrolytic refining technology, and in particular to a device for electrolytic collection of dendritic silver powder. Background Technology

[0002] Dendritic silver powder, as a high-value-added functional material, is widely used in electronics, catalysis and other fields. Its preparation is mostly carried out by electrolytic deposition. Traditional electrolytic devices have the following defects in practical applications: (1) The conductive beam and conductive connector are mostly made of copper as the current carrier, but they are prone to oxidation and corrosion in the acidic electrolyte environment for a long time, which leads to a decrease in conductivity and affects the electrolysis efficiency and current stability of silver powder; (2) The surface roughness (Ra value) of industrial titanium cathode plates is usually greater than 0.5 μm, which makes it easy for some silver powder to be embedded in the surface micropores. When scraping, silver powder residue is easy to remain and the plate surface is easy to be scratched; (3) Conventional cathode structures lack effective constraint mechanisms. Micron-sized silver powder is easy to diffuse to the anode area under the action of electrolyte turbulence and form back dissolution, resulting in waste of raw materials and a decrease in electrolyte stability.

[0003] Although existing technologies have been optimized by improving the shape of the titanium cathode plate or adding a filtration mechanism, they have failed to systematically solve the above-mentioned problems and still suffer from drawbacks such as high powder residue rate, short component life, and large silver powder escape loss. Therefore, this technical solution proposes a device for the electrolytic collection of dendritic silver powder. Utility Model Content

[0004] This invention addresses the shortcomings of existing technologies by providing a device for the electrolytic collection of dendritic silver powder, thereby solving the problems of frequent component replacement and significant silver powder loss in existing technologies, improving silver powder collection efficiency, and enhancing electrolytic stability.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows:

[0006] An apparatus for electrolytic collection of dendritic silver powder includes a conductive beam, a conductive connector, a cathode plate, and a cathode filter device. The conductive connector is located below one end of the conductive beam, the cathode plate is located below the conductive beam, the cathode filter device is sleeved around the cathode plate, and there is a gap between the inner wall of the cathode filter device and the outer wall of the cathode plate. The cathode filter device is connected to the conductive beam through a connector.

[0007] Furthermore, the connector is a hanging rope, and the cathode filter device is connected to the conductive beam via the hanging rope.

[0008] Furthermore, the hanging rope is provided with at least two ropes.

[0009] Furthermore, the cathode filter device includes a filter and a frame, with the frame supporting the filter.

[0010] Furthermore, the distance between the filter screen and the surface of the cathode plate is 20-25 mm.

[0011] Furthermore, the edges of the skeleton are arc-shaped.

[0012] Furthermore, the conductive crossbeam is made of pure titanium.

[0013] Furthermore, the conductive connector is a silver-plated conductive connector with a silver plating layer thickness ≥20μm.

[0014] In summary, compared with the prior art, the beneficial effects of the above technical solution are:

[0015] (1) The dendritic silver powder electrolytic collection device uses titanium metal as the conductive beam and silver-plated conductive joints instead of traditional copper joints, which can significantly improve the corrosion resistance and oxidation resistance of conductive components, thereby greatly extending their service life; due to the excellent conductivity of silver, the silver plating layer can reduce contact resistance, reduce power loss, ensure the current stability of the electrolysis process, and avoid current fluctuations caused by poor contact; in addition, the stable current density helps silver ions to be uniformly deposited on the cathode surface, thereby improving the physical and chemical uniformity of different batches of silver powder and ensuring the purity and consistency of the final product.

[0016] (2) The dendritic silver powder electrolytic collection device can significantly improve the surface smoothness of the cathode and reduce the adhesion strength of silver powder by using a cathode plate with higher surface flatness (Ra value 0.1-0.2μm). The smooth cathode surface can reduce the frictional resistance when mechanically scraping silver powder, making the silver powder peeling more efficient, reducing the damage to the titanium plate surface during scraping, thereby extending the service life of the cathode plate, reducing the residual rate of silver powder, and improving the silver recovery rate.

[0017] (3) The dendritic silver powder electrolytic collection device adopts a high-strength nylon woven cathode filter device, which effectively prevents the diffusion of silver powder with the turbulence of the electrolyte without affecting the flow of the electrolyte, and provides convenience for silver powder collection; reducing the loss caused by anode back dissolution and dispersed silver powder during the collection process. Attached Figure Description

[0018] Figure 1 This is a main sectional view of a device for electrolytic collection of dendritic silver powder according to the present invention;

[0019] Figure 2 This is a top sectional view of a device for the electrolytic collection of dendritic silver powder according to the present invention;

[0020] Figure 3 This is a schematic diagram of the skeleton and filter screen in a device for electrolytic collection of dendritic silver powder according to the present invention.

[0021] Explanation of reference numerals in the attached drawings: 1. Conductive beam; 2. Conductive connector; 3. Cathode plate; 4. Cathode filter device; 5. Frame; 6. Filter screen; 7. Hanging rope. Detailed Implementation

[0022] The principles and features of this utility model are described below with reference to all the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0023] This utility model discloses an apparatus for the electrolytic collection of dendritic silver powder.

[0024] Reference Figures 1-3 A device for electrolytic collection of dendritic silver powder includes a conductive beam 1, a conductive connector 2, a cathode plate 3, and a cathode filter device 4. The cathode plate 3 is made of titanium. The conductive connector 2 is located below one end of the conductive beam 1. The cathode plate 3 is located directly below the conductive beam 1 and connected to it. The cathode filter device 4 is sleeved around the cathode plate 3, and there is a gap between the inner wall of the cathode filter device 4 and the outer wall of the cathode plate 3. The gap between the inner wall of the cathode filter device 4 and the outer wall of the cathode plate 3 is 20-25 mm, which is the distance from the filter screen 6 to the surface of the cathode plate 3. The gap between the bottom of the filter screen 6 and the bottom of the cathode plate 3 is also 20-25 mm. The cathode filter device 4 is connected to the conductive beam 1 via a connector. The connector is a hanging rope 7, which is a nylon braided rope with a diameter of 6 mm and can safely bear a weight of 100 kg. In this embodiment, there are two hanging ropes 7, located at both ends of the cathode filter device 4. The hanging ropes 7 are connected to the conductive beam 1 and are used to fix the cathode filter device 4 to the periphery of the cathode plate 3.

[0025] The conductive beam 1, made of titanium, and the silver-plated conductive connector 2 effectively block the corrosion channels of the copper substrate. This structure allows the conductive beam 1 and conductive connector 2 to maintain stable conductivity over a long period, solving the problem of unstable current caused by oxidation of traditional copper conductive materials, ensuring product consistency, and significantly extending the service life of components. The cathode plate 3, made of titanium with higher surface flatness, effectively reduces silver powder adhesion, improves silver powder scraping efficiency, and reduces damage to the titanium plate surface during the scraping process. The conductive connector 2 is a copper conductive connector prepared by surface chemical silver plating, with a silver plating layer thickness ≥20μm.

[0026] The cathode filter device 4 includes a frame 5 and a filter screen 6. The frame 5 is made of pure titanium metal, providing structural stability for the filter device. Its edges are rounded to prevent sharp metal objects from puncturing the filter screen 6. The filter screen 6 is made of nylon with a mesh size of 100, possessing high strength, corrosion resistance, and good wear resistance. The cathode filter device 4, made of high-strength nylon braid, effectively reduces anodic back-dissolution loss and collection loss caused by silver powder diffusion with the electrolyte. Furthermore, this nylon filter screen has excellent corrosion resistance and can operate stably in acidic electrolytic environments for extended periods.

[0027] The implementation principle of the device for electrolytic collection of dendritic silver powder according to this embodiment of the invention is as follows:

[0028] In use, the cathode plate 3 and cathode filter device 4 are suspended below the conductive beam 1, with the cathode filter device 4 fitted around the periphery of the cathode plate 3. The silver-plated conductive connector 2 is placed below one end of the conductive beam 1. During electrolysis, the cathode filter device 4 effectively confines the silver powder within the filter screen 6, preventing the silver powder from moving with the turbulent electrolyte flow to the vicinity of the anode and causing back dissolution. After the electrolysis process is completed, the silver powder can be collected by simply scraping the powder off the cathode plate 3 and lifting the cathode filter device 4.

[0029] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An apparatus for electrolytic collection of dendritic silver powder, characterized in that, It includes a conductive beam (1), a conductive connector (2), a cathode plate (3), and a cathode filter device (4); the conductive connector (2) is located below one end of the conductive beam (1), the cathode plate (3) is located below the conductive beam (1), the cathode filter device (4) is sleeved on the periphery of the cathode plate (3), and there is a gap between the inner wall of the cathode filter device (4) and the outer wall of the cathode plate (3). The cathode filter device (4) is connected to the conductive beam (1) through a connector.

2. A device for electrolytic collection of dendritic silver powder according to claim 1, characterized in that: The connector is a hanging rope (7), and the cathode filter device (4) is connected to the conductive beam (1) via the hanging rope (7).

3. A device for electrolytic collection of dendritic silver powder according to claim 2, characterized in that: The hanging rope (7) shall be provided with at least two ropes.

4. The apparatus for electrolytic collection of dendritic silver powder according to claim 1, characterized in that: The cathode filter device (4) includes a filter (6) and a frame (5), with the filter (6) supported by the frame (5).

5. The apparatus for electrolytic collection of dendritic silver powder according to claim 4, characterized in that: The distance between the filter screen (6) and the surface of the cathode plate (3) is 20-25 mm.

6. The apparatus for electrolytic collection of dendritic silver powder according to claim 4, characterized in that: The edges of the skeleton (5) are arc-shaped.

7. The apparatus for electrolytic collection of dendritic silver powder according to claim 1, characterized in that: The conductive crossbeam (1) is made of pure titanium.

8. The apparatus for electrolytic collection of dendritic silver powder according to claim 1, characterized in that: The conductive connector (2) is a silver-plated conductive connector with a silver plating layer thickness ≥20μm.

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