Superfine silver powder production equipment for silver electrolytic refining

Abstract

The superfine silver powder production equipment comprises a refining box, a vibration device and a fixing frame, the fixing frame is arranged in the refining box, the two sides of the fixing frame are installed on the two side walls of the refining box through buffer devices, a supporting frame is installed on the fixing frame, and the vibration device is arranged on the supporting frame. A plurality of cathode plates and a plurality of anode plates are installed at the lower end of the supporting frame, the anode plates are sleeved with anode bags, the vibration device comprises transmission boxes, driving motors, transmission rods, transmission assemblies and connecting rod assemblies, the transmission boxes are installed at the two ends of the refining box, the transmission rods capable of rotating are installed on the transmission boxes, one transmission rod is provided with the driving motor, and the other transmission rod is provided with the connecting rod assemblies. The two transmission boxes are connected through the conveying belt, the lower end of each transmission rod is connected with the transmission assembly, the transmission assembly is connected with the connecting rod assembly, and the connecting rod assembly is connected with the fixing frame. Through vibration of the negative plate, silver powder on the surface of the negative plate can be vibrated off in time, small-particle silver powder is prevented from being agglomerated, the powder scraping procedure is omitted, and time and labor are saved.

Description

Technical Field

[0001] This utility model relates to the field of silver electrolytic refining technology, specifically to an ultrafine silver powder production equipment for silver electrolytic refining. Background Technology

[0002] Silver electrolytic refining is a method for purifying crude silver using electrochemical principles. A silver anode plate containing impurities is placed in an electrolytic cell. Under the action of direct current, the silver at the anode undergoes oxidation and dissolves into the solution, while silver ions in the solution are preferentially reduced and precipitated at the cathode. Impurities, being insoluble, enter the anode mud, thus achieving the separation of silver from impurities and obtaining high-purity silver powder.

[0003] In the process of preparing ultrafine silver powder through electrolytic refining of silver, most existing production equipment has many problems. On the one hand, the silver powder deposited on the cathode usually needs to be collected by scraping. Before scraping, small silver particles tend to agglomerate into larger particles on the cathode surface, which cannot meet the requirements of high-end applications for ultrafine silver powder. Moreover, silver powder often adheres to the cathode plate surface, requiring multiple scraping processes, which increases the complexity of the actual operation. On the other hand, during electrolysis, the electrolyte is prone to poor flow, resulting in a concentration gradient, which is detrimental to the morphology and particle size distribution of the silver powder. Utility Model Content

[0004] This invention addresses existing technical problems by providing an ultrafine silver powder production device for silver electrolytic refining.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A production equipment for ultrafine silver powder in silver electrolytic refining includes a refining box, a vibration device, a buffer device, and a fixed frame. The fixed frame is disposed inside the refining box. The two sides of the fixed frame are mounted on the two side walls of the refining box through the buffer device. A support frame is mounted on the fixed frame. Multiple cathode plates and multiple anode plates are mounted on the lower end of the support frame. An anode bag is sleeved on the outer side of the anode plate. The vibration device includes a transmission box, a drive motor, a transmission rod, a transmission assembly, and a connecting rod assembly. The transmission box is installed at both ends of the refining box. A rotatable transmission rod is mounted on the transmission box. The drive motor is mounted on one of the transmission rods. The two transmission boxes are connected by a conveyor belt. The lower end of each transmission rod is connected to the transmission assembly. The transmission assembly is connected to the connecting rod assembly. The connecting rod assembly is connected to the fixed frame.

[0006] Based on the above technical solution, the present invention can be further improved as follows:

[0007] Preferably, the transmission assembly includes a first bevel gear, a second bevel gear, a through rod, a driving gear, a driven gear, and a fixed shaft. The first bevel gear is mounted on the transmission rod and meshes with the second bevel gear. The second bevel gear and the driving gear are mounted on the through rod. The through rod is rotatably mounted on the refining box. The driving gear meshes with the driven gear. The driven gear is mounted on the fixed shaft. The fixed shaft is rotatably mounted on the refining box and is connected to the connecting rod assembly.

[0008] Preferably, the linkage assembly includes a rotating rod, a transmission arm, and a support rod. One end of the rotating rod is fixedly connected to the fixed shaft, the other end of the rotating rod is hinged to the transmission arm, the other end of the transmission arm is hinged to the support rod, and the support rod is connected to the fixed frame.

[0009] Preferably, the buffer device includes a first connecting frame, a spring buffer frame, and a second connecting frame. One end of the first connecting frame is connected to the fixed frame, and the other end is connected to the spring buffer frame. The spring buffer frame is located between the first connecting frame and the second connecting frame. One end of the second connecting frame is connected to the spring buffer frame, and the other end is installed on the side wall of the refining box.

[0010] Preferably, the plurality of cathode plates and the plurality of anode plates are arranged alternately.

[0011] Preferably, the refining box is provided with a collection tank, which is located below the plurality of cathode plates, and the collection tank is provided with a silver powder filter.

[0012] Preferably, the silver powder filter is a nylon filter.

[0013] Preferably, there are two support frames, each of which is connected to a controller via a transmission terminal, and the controller is installed on the outer wall of the refining box.

[0014] Preferably, a sliding sleeve is installed on the support frame, the sliding sleeve is slidably mounted on the support plate, and the support plate covers the conveyor belt.

[0015] The beneficial effects of this utility model are:

[0016] 1. The drive motor drives the transmission rod, which then passes through a series of gears to vibrate the anode and cathode plates. The vibration effectively enhances electrolyte convection, making the silver ion concentration near the cathode more uniform and reducing concentration polarization caused by ion diffusion limitation. Furthermore, the vibration of the cathode plate allows the silver powder on the cathode plate surface to be shaken off in time, preventing the agglomeration of small silver powder particles and eliminating the need for powder scraping, thus saving time and manpower.

[0017] 2. By setting up an alternating arrangement of cathode and anode plates, the electrolysis efficiency is further improved. At the same time, the use of anode bags effectively prevents anode mud from mixing into the electrolyte, ensuring the purity of silver powder. Furthermore, the spring buffer frame reduces the impact on the refining box when the fixed frame moves, ensuring the stability and reliability of the equipment and extending its service life. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a schematic diagram of the present invention from another angle;

[0020] Figure 3 This is a schematic diagram showing the distribution of the anode plate and cathode plate of this utility model;

[0021] Figure 4 This is a schematic diagram of the transmission assembly and connecting rod assembly of this utility model;

[0022] Figure 5 This is a schematic diagram of the internal structure of the transmission box of this utility model.

[0023] The attached diagram is labeled as follows: 1. Refining box; 2. Support leg; 3. Transmission box; 4. Drive motor; 5. Transmission rod; 6. Support plate; 7. Bearing; 8. Bevel gear one; 9. Bevel gear two; 10. Through rod; 11. Driving gear; 12. Driven gear; 13. Fixed shaft; 14. Rotating rod; 15. Transmission arm; 16. Support rod; 17. Fixed frame; 18. Support frame; 19. Sliding sleeve; 20. Cathode plate; 21. Collection tank; 22. Silver powder filter; 23. Connecting frame one; 24. Spring buffer frame; 25. Controller; 26. Transmission terminal; 27. Anode plate; 28. Anode bag; 29. ​​Fixed ear; 30. Connecting frame two. Detailed Implementation

[0024] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0025] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. The terms "vertical," "upper," "lower," "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this utility model.

[0026] Reference Figures 1 to 5 As shown, this utility model discloses an ultrafine silver powder production equipment for silver electrolytic refining, including a refining tank 1, a buffer device, a vibration device, and a fixing frame 17. The refining tank 1 is mounted on multiple support legs 2. The refining tank 1 is made of polypropylene hydrocarbon material (i.e., PPH material), which enables the refining tank 1 to withstand the strong corrosiveness of the electrolyte, ensuring long-term stable operation of the equipment. It also has good strength and rigidity, which can support the various internal components of the equipment. The fixing frame 17 is set inside the refining tank 1. The two sides of the fixing frame 17 are mounted on the inner walls of the two sides of the refining tank 1 through the buffer device. A support frame 18 is installed on the fixing frame 17 and the support frame 18 can move along the fixing frame 17. Multiple cathode plates 20 and multiple anode plates 27 are installed at the lower end of the support frame 18 through fixing ears 29. An anode bag 28 is sleeved on the outside of the anode plate 27 to prevent anode mud from mixing into the electrolyte. The electrolyte ensures the quality of the silver powder. The vibration device includes a transmission box 3, a drive motor 4, a transmission rod 5, a transmission assembly, and a connecting rod assembly. The transmission box 3 is installed at both ends of the refining box 1. By setting the transmission box 3, it can accommodate and protect the transmission components, preventing electrolyte from splashing in and causing damage. The transmission rod 5 is mounted on the transmission box 3 through a bearing 7. The bearing 7 is a rolling bearing, which has the characteristics of low friction and high speed, which can reduce the resistance when the transmission rod 5 rotates and improve the transmission efficiency. One of the transmission rods 5 is equipped with a drive motor 4. The drive motor 4 is a servo motor, which can precisely adjust the output speed according to different stages and needs of electrolytic refining to better meet the requirements of silver powder vibration. The two transmission boxes 3 are connected by a conveyor belt. The lower end of each transmission rod 5 is connected to the transmission assembly, the transmission assembly is connected to the connecting rod assembly, and the connecting rod assembly is connected to the fixed frame 17. The refining box 1 is symmetrically equipped with transmission components and connecting rod components at both ends to ensure stable vibration of the fixed frame 17. When the drive motor 4 is working, it drives the transmission rod 5 to rotate, which in turn causes the fixed frame 17 to vibrate through the transmission components and connecting rod components. This, in turn, causes the cathode plate 20 and the anode plate 27 to vibrate, which can effectively promote the timely shedding of silver powder, avoid the agglomeration of silver powder on the surface of the cathode plate 20, improve the collection efficiency of silver powder, eliminate the need for additional powder scraping process, save time and labor costs, and solve the problems of silver powder agglomeration and low collection efficiency in traditional silver electrolytic refining.

[0027] Reference Figure 4 As shown, specifically, the transmission assembly includes a first bevel gear 8, a second bevel gear 9, a through rod 10, a driving gear 11, a driven gear 12, and a fixed shaft 13. The first bevel gear 8 is mounted on the transmission rod 5 and meshes with the second bevel gear 9. The second bevel gear 9 and the driving gear 11 are coaxially mounted on the through rod 10. The through rod 10 is rotatably mounted on the refining box 1. The driving gear 11 meshes with the driven gear 12. The driven gear 12 is mounted on the fixed shaft 13. The fixed shaft 13 is rotatably mounted on the side wall of the refining box 1. The fixed shaft 13 is connected to the connecting rod assembly. The fixed shaft 13 is a solid shaft, which can withstand the torque transmitted by the driven gear 12 and ensure stable power transmission. When the drive motor 4 is working, it drives the transmission rod 5 to rotate. The transmission rod 5 drives the first bevel gear 8 to rotate synchronously. Since the first bevel gear 8 and the second bevel gear 9 are meshed, the first bevel gear 8 drives the second bevel gear 9 to rotate, thereby driving the drive gear 11 to rotate. Since the drive gear 11 is meshed with the driven gear 12, it drives the driven gear 12 to rotate, thereby driving the fixed shaft 13 to rotate. The fixed shaft 13 drives the fixed frame 17, the cathode plate 20 and the anode plate 27 to vibrate through the connecting rod assembly, which promotes the convection of the electrolyte and the shedding of silver powder, simplifying the silver powder collection process.

[0028] Specifically, the linkage assembly includes a rotating rod 14, a transmission arm 15, and a support rod 16. One end of the rotating rod 14 is fixedly connected to the fixed shaft 13, and the other end of the rotating rod 14 is hinged to the transmission arm 15. The other end of the transmission arm 15 is hinged to the support rod 16, and the support rod 16 is connected to the fixed frame 17. The transmission arm 15 connects the rotating rod 14 and the support rod 16, and converts the rotation of the rotating rod 14 into the reciprocating motion of the support rod 16, ensuring that the motion trajectory and amplitude of the support rod 16 meet the requirements of electrolytic refining. The end of the support rod 16 away from the transmission arm 15 is fixedly connected to the fixed frame 17. Driven by the transmission arm 15, the support rod 16 causes the fixed frame 17 to reciprocate, and the vibration is generated by the stretching and limiting of the buffer devices on both sides. The silver powder deposited on the cathode plate 20 does not adhere firmly to the cathode plate 20, and most of it is easily detached. By driving the cathode plate 20 to vibrate, the silver powder on the cathode plate 20 is shaken off, improving the silver powder collection efficiency.

[0029] In this embodiment, four buffer devices are provided, two on each side of the fixed frame 17, to ensure the buffering effect. The buffer device includes a first connecting frame 23, a spring buffer frame 24, and a second connecting frame 30. One end of the first connecting frame 23 is connected to the fixed frame 17, and the other end is connected to the spring buffer frame 24. The spring buffer frame 24 is located between the first connecting frame 23 and the second connecting frame 30. One end of the second connecting frame 30 is connected to the spring buffer frame 24, and the other end is installed on the side wall of the refining box 1. The spring buffer frame 24 absorbs and buffers the impact force generated when the fixed frame 17 vibrates, reducing the impact of vibration on the equipment, protecting the internal components of the equipment, and improving the stability and reliability of the equipment operation. The buffer device can apply force to the fixed frame 17, facilitating the normal reset of the fixed frame 17 and ensuring the effective dissipation of silver powder.

[0030] Furthermore, multiple cathode plates 20 and multiple anode plates 27 are arranged alternately. This increases the surface area for the electrolytic reaction and improves the electrolysis efficiency.

[0031] Furthermore, the refining box 1 is equipped with a collection tank 21, which is located below multiple cathode plates 20. The collection tank 21 is equipped with a silver powder filter screen 22. During the electrolysis process, the silver powder generated will precipitate into the collection tank 21 along with the electrolyte. The silver powder filter screen 22 can filter out the electrolyte and only allow the silver powder to remain, thereby achieving effective collection and filtration of silver powder, simplifying the silver powder collection process, and improving the collection efficiency and purity of the silver powder.

[0032] In this embodiment, the silver powder filter 22 is a nylon filter with a mesh size of 100. The chemical stability of nylon material makes it resistant to damage in strong electrolyte environments, ensuring the filter's corrosion resistance and durability, and maintaining good filtration performance.

[0033] In other embodiments, different pore sizes of filter screens can be selected to meet the collection requirements of silver powder of different particle sizes, for example, using finer filter screens to capture smaller silver powder particles.

[0034] Furthermore, two support frames 18 are provided, each support frame 18 being connected to a controller 25 via a transmission terminal 26. The controller 25 is mounted on the outer wall of the refining tank 1. The conductive support frame 18 not only has good conductivity, enabling stable current transmission to the electrode plates, but also possesses a certain strength and rigidity, capable of stably supporting the cathode plate 20 and the anode plate 27. The transmission terminal 26 ensures the stability and reliability of current transmission, and the transmission line uses high-quality conductive cable with good insulation and conductivity.

[0035] Furthermore, a sliding sleeve 19 is installed on the support frame 18. The sliding sleeve 19 is slidably mounted on the support plate 6, and a gap is provided between the sliding sleeve 19 and the support plate 6 to allow the sliding sleeve 19 to vibrate. The support plate 6 covers the conveyor belt and is made of high-strength alloy material. Its structural design can evenly distribute the pressure borne by the transmission rod 5, ensuring the stability of the transmission rod 5. By pushing the position of the sliding sleeve 19 on the support plate 6, the distance between the two support frames 18 is adjusted, thereby achieving the purpose of adjusting the electrode spacing, optimizing the current density, improving the current efficiency, and helping to form a more uniform and dense silver powder deposition layer, reducing impurity inclusions, and thus improving the purity and quality of the final product.

[0036] Working principle and usage process of this utility model:

[0037] In operation, an appropriate amount of electrolyte is added to the refining tank 1. The composition and concentration of the electrolyte are configured according to actual production needs. The drive motor 4 is started, and the drive motor 4 drives the bevel gear 8 to rotate via the transmission rod 5. The bevel gear 8 meshes with the bevel gear 9, transmitting the rotational torque to the through rod 10. The driving gear 11 on the through rod 10 meshes with the driven gear 12, causing the fixed shaft 13 to start rotating. The rotation of the fixed shaft 13 is converted into the vibration of the fixed frame 17 through the connecting rod assembly. The fixed frame 17 drives the cathode plate 20 and the anode plate 27 to vibrate, promoting the convection of the electrolyte and promptly shaking off the silver powder precipitated on the cathode plate 20, preventing the silver particles from agglomerating and growing excessively, so as to obtain small-particle ultrafine silver powder. This ensures that the silver powder is uniformly precipitated and falls off in time, eliminating the need for powder scraping and improving collection efficiency. At the same time, the spring buffer frame 24 absorbs the impact force generated by the vibration, protecting the refining tank 1 and other transmission components. During electrolysis, the generated silver powder settles into the bottom collection tank 21 along with the electrolyte. The silver powder filter 22 filters out the electrolyte, allowing only the silver powder to remain, thus achieving rapid and efficient collection of the silver powder. The entire process is controlled by the controller 25, which adjusts current parameters such as the magnitude and direction of the current according to different stages and requirements of electrolytic refining to ensure the high efficiency and stability of the electrolysis process. After the electrolysis process is completed, the drive motor 4 and the controller 25 are turned off, the collection tank 21 is opened, and the silver powder collected by the silver powder filter 22 is removed, completing the production process of ultrafine silver powder and improving the efficiency of silver powder collection.

[0038] 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. A device for producing ultrafine silver powder through electrolytic refining of silver, characterized in that, The device includes a refining box (1), a vibration device, a buffer device, and a fixing frame (17). The fixing frame (17) is disposed inside the refining box (1). The two sides of the fixing frame (17) are mounted on the two side walls of the refining box (1) through the buffer device. A support frame (18) is mounted on the fixing frame (17). Multiple cathode plates (20) and multiple anode plates (27) are mounted on the lower end of the support frame (18). An anode bag (28) is fitted on the outside of the anode plate (27). The vibration device includes a transmission box. (3) Drive motor (4), transmission rod (5), transmission assembly and connecting rod assembly. The transmission box (3) is installed at both ends of the refining box (1). A rotatable transmission rod (5) is installed on the transmission box (3). The drive motor (4) is installed on one of the transmission rods (5). The two transmission boxes (3) are connected by a conveyor belt. The lower end of each transmission rod (5) is connected to the transmission assembly. The transmission assembly is connected to the connecting rod assembly. The connecting rod assembly is connected to the fixed frame (17).

2. The ultrafine silver powder production equipment for silver electrolytic refining according to claim 1, characterized in that, The transmission assembly includes a first bevel gear (8), a second bevel gear (9), a through rod (10), a driving gear (11), a driven gear (12), and a fixed shaft (13). The first bevel gear (8) is mounted on the transmission rod (5). The first bevel gear (8) meshes with the second bevel gear (9). The second bevel gear (9) and the driving gear (11) are mounted on the through rod (10). The through rod (10) is rotatably mounted on the refining box (1). The driving gear (11) meshes with the driven gear (12). The driven gear (12) is mounted on the fixed shaft (13). The fixed shaft (13) is rotatably mounted on the refining box (1). The fixed shaft (13) is connected to the connecting rod assembly.

3. The ultrafine silver powder production equipment for silver electrolytic refining according to claim 2, characterized in that, The linkage assembly includes a rotating rod (14), a transmission arm (15), and a support rod (16). One end of the rotating rod (14) is fixedly connected to the fixed shaft (13), and the other end of the rotating rod (14) is hinged to the transmission arm (15). The other end of the transmission arm (15) is hinged to the support rod (16), and the support rod (16) is connected to the fixed frame (17).

4. The ultrafine silver powder production equipment for silver electrolytic refining according to claim 1, 2, or 3, characterized in that, The buffer device includes a first connecting frame (23), a spring buffer frame (24), and a second connecting frame (30). One end of the first connecting frame (23) is connected to the fixed frame (17), and the other end is connected to the spring buffer frame (24). The spring buffer frame (24) is located between the first connecting frame (23) and the second connecting frame (30). One end of the second connecting frame (30) is connected to the spring buffer frame (24), and the other end is installed on the side wall of the refining box (1).

5. The ultrafine silver powder production equipment for silver electrolytic refining according to claim 1, characterized in that, The plurality of cathode plates (20) and the plurality of anode plates (27) are arranged alternately.

6. The ultrafine silver powder production equipment for silver electrolytic refining according to claim 1, characterized in that, The refining box (1) is provided with a collection tank (21), which is located below the plurality of cathode plates (20), and a silver powder filter (22) is provided in the collection tank (21).

7. The ultrafine silver powder production equipment for silver electrolytic refining according to claim 6, characterized in that, The silver powder filter (22) is a nylon filter.

8. The ultrafine silver powder production equipment for silver electrolytic refining according to claim 1, characterized in that, Two support frames (18) are provided, and each support frame (18) is connected to the controller (25) through a transmission terminal (26). The controller (25) is installed on the outer wall of the refining box (1).

9. The ultrafine silver powder production equipment for silver electrolytic refining according to claim 8, characterized in that, A sliding sleeve (19) is installed on the support frame (18), and the sliding sleeve (19) is slidably installed on the support plate (6), which covers the conveyor belt.

Images