Cathode frame facilitating groove discharge and electrolysis system

Abstract

The utility model discloses a cathode frame and electrolytic system convenient for groove, including the frame of being suitable for supporting on electrolytic tank, the frame is in the definition of receiving the accommodation space of cathode plate, the cathode plate is hung in this accommodation space through its lifting lug, the top of accommodation space defines the top opening for the cathode plate to go in and out this accommodation space, wherein, the top opening is configured: when the cathode plate is in the operation state of being received in the accommodation space, the top opening is located below the lifting lug, so that when observing in the direction perpendicular to the cathode plate, the cathode frame and lifting lug do not have coincident area, to prevent the precipitate formed at the top opening and the lifting lug from producing the card arrest and prevent the cathode plate and cathode frame from separating. A cathode frame and electrolytic system convenient for groove of the application, facilitate the cathode plate and the metal plate generated to go out the groove and clean up.

Description

Technical Field

[0001] This utility model relates to the field of electrolysis technology, and more specifically, to a cathode frame and electrolysis system that facilitates removal from the cell. Background Technology

[0002] In the field of metal electrolytic refining, the electrowinning of metals such as nickel and cobalt has long relied on the cathode bagging process. In this process, a diaphragm frame is installed inside the electrolytic cell, and a diaphragm bag covers the cathode. The bag contains catholyte, and the outside contains anolyte. Catholyte is dripped into each diaphragm bag through a small hole via an inlet pipe at the top of the diaphragm frame. However, because the permeability of the diaphragm bag is extremely small, the amount of catholyte added is limited, easily leading to significant concentration polarization, which affects the quality of nickel and cobalt products. Simultaneously, the diaphragm bag's proximity to the metal plate makes it prone to sticking, shortening its lifespan and increasing production costs.

[0003] To address the aforementioned issues, the anode bagging process was developed. This process involves placing a diaphragm bag over the anode frame, with a cathode frame surrounding each cathode. The insulating mesh on the cathode frame isolates the nickel and cobalt metal plates, effectively reducing bag adhesion. Simultaneously, the anode bagging frees up the cathode chamber, allowing for high-flow-rate catholyte circulation (5-10 times that of the cathode bagging process), significantly reducing concentration polarization and substantially improving the quality of the nickel and cobalt metal plates.

[0004] However, the anode bagging process still has the following problems:

[0005] 1. During the electrodeposition process of nickel and cobalt plates, the plate surface is prone to deformation due to the large internal stress, which cannot be completely improved even after secondary plate treatment; and the lugs (lifting lugs) of nickel and cobalt cathode plates are prone to dendrites or large nodules during electrodeposition due to uneven processing. This can cause the metal plate to get stuck at the top of the cathode frame when exiting the cell, which may carry the cathode frame out of the electrolytic cell and interfere with normal production.

[0006] 2. When the metal plate leaves the tank, the electrolyte it carries will dry and crystallize along the edge of the cathode frame, reducing its internal space, hindering the metal plate's removal from the tank and affecting the equipment's appearance.

[0007] Therefore, optimizing the cathode frame structure to solve the above problems has become the key to improving the stability of the anode bagging process. Utility Model Content

[0008] The purpose of this invention is to provide a cathode frame and electrolysis system that facilitates the removal of metal plates from the tank, so as to solve the problem of interference when removing metal plates generated in the prior art.

[0009] To achieve the above objectives, in a first aspect, the present invention provides a cathode frame that facilitates removal from the electrolytic cell, comprising a frame suitable for support on an electrolytic cell, wherein the frame defines an accommodating space for receiving the cathode plate, and the cathode plate is suspended in the accommodating space by its lugs.

[0010] The top of the accommodating space defines a top opening for the cathode plate to enter and exit the accommodating space;

[0011] The top opening is configured as follows:

[0012] When the cathode plate is in the operating state of being received within the accommodating space, the top opening is located below the lifting lug, such that when viewed in a direction perpendicular to the cathode plate, there is no overlapping area between the cathode frame and the lifting lug, to prevent precipitates formed at the top opening from getting stuck with the lifting lug and preventing the cathode plate and cathode frame from separating.

[0013] By adopting the above technical solution, the top opening is located below the lifting lug. During the process of the cathode plate carrying the metal plate into and out of the cathode frame, this prevents dendrites or granules on the lifting lug from colliding or scraping against the isolation mesh. This prevents precipitates formed at the top opening from jamming with the lifting lug and hindering the separation of the cathode plate and cathode frame. Structurally, this reduces the probability of contact interference between the two, significantly improving the smoothness of the metal plate exiting the tank and reducing the risk of equipment jamming or damage due to interference. The isolation mesh of the cathode frame prevents the metal plate from sticking to the bag, protects the diaphragm bag of the anode frame, prevents damage to the diaphragm bag, reduces anolyte leakage, and extends the service life of the diaphragm bag.

[0014] Furthermore, the frame has two cathode protection portions arranged opposite each other in the front-to-back direction, defining the top opening between the two cathode protection portions. The protection portion is an isolation mesh structure, the upper edge of the isolation mesh defining the boundary of the top opening, and the upper edge area of ​​the isolation mesh corresponding to the lifting lug is positioned below the lower edge of the lifting lug by a predetermined safety distance L.

[0015] During the growth of nickel and cobalt plates, the internal stress during the electrodeposition process is relatively large, and the plate surface is prone to deformation. Even after a second plate-making process, the deformation of the plate surface cannot be completely improved. Furthermore, uneven processing at the cathode plate lugs of nickel and cobalt cathode plates can lead to the formation of dendrites or large nodules during the electrodeposition process. All of these factors can cause the metal plate to get stuck at the top of the cathode frame during the removal process, resulting in the cathode frame being carried out of the electrolytic cell along with the metal plate, which affects normal production.

[0016] By adopting the above technical solution, the safe distance L between the upper edge of the isolation net and the lower edge of the lifting lug is quantitatively set, so that the size of the detached space is controllable and stable. It can adapt to the thickness range of dendrite growth in the lifting lug area under different electrolysis environments, ensuring that it always maintains a non-contact state during the movement of the cathode plate. Even if the lifting lug is not processed evenly, there will be no problems of frame jamming or sticking. This improves the reliability and versatility of the structural design.

[0017] Furthermore, the bottom of the cathode frame is provided with an inlet hole to facilitate the entry and exit of electrolyte into the accommodating space.

[0018] By adopting the above technical solution, the liquid inlet hole at the bottom of the cathode frame can increase the flow path of the electrolyte. Combined with the through holes of the isolation mesh, it forms a circulation channel that runs through the upper and lower parts, which improves the renewal efficiency of the electrolyte in the containment space, reduces the difference in metal ion concentration gradient, helps to reduce concentration polarization, and improves the deposition uniformity of the metal plate.

[0019] Furthermore, the cathode frame is provided with a suspension part, and the cathode frame is fixed to the electrolytic cell through the suspension part.

[0020] By adopting the above technical solution, the suspension unit provides a stable hoisting and fixing method for the cathode frame, which can accurately control the installation height of the cathode frame in the electrolytic cell, ensure that the relative position of the isolation net and the liquid surface meets the design requirements, and at the same time prevent the cathode frame from shifting when the electrolyte flows or the metal plate moves, thus improving the stability of the overall structure.

[0021] Furthermore, the cathode frame is provided with support legs, which are used to abut and fix against the bottom surface of the electrolytic cell.

[0022] By adopting the above technical solution, the support legs can be used for support and positioning, and can also form a double support structure with the suspension part. This not only shares the weight of the cathode frame, but also limits its swaying in the horizontal direction. In particular, when the metal plate is removed from the slot, it can resist the lateral force that may be generated by the lifting lugs and the isolation net, prevent the cathode frame from tilting or shifting, and enhance the safety of equipment operation.

[0023] Furthermore, the cathode frame is provided with a retaining edge on its side and / or bottom, the retaining edge being used to prevent the metal plate generated on the cathode plate surface from protruding outside the accommodating space due to deformation.

[0024] By adopting the above technical solution, the retaining edge can physically block the protruding part of the metal plate caused by internal stress deformation, preventing it from exceeding the accommodating space and contacting the external diaphragm bag or other components. This not only protects the diaphragm bag and extends its service life, but also ensures the regularity of the metal plate's shape and reduces the difficulty of subsequent processing.

[0025] Secondly, this utility model also relates to an electrolysis system, including an electrolytic cell and a cathode frame as described in the first aspect for easy removal from the cell. The electrolytic cell is filled with cathode liquid, the cathode frame is disposed in the electrolytic cell, and the top opening is immersed below the surface of the cathode liquid.

[0026] By adopting the above technical solutions, the electrolysis system integrates all the technical advantages of the cathode frame that facilitates the removal of metal plates from the tank, enabling efficient and stable production of metal plates. In particular, it solves the problem of interference when removing metal plates from the tank in traditional systems, and improves the continuity and automation adaptability of the overall production process.

[0027] In some embodiments, a cathode liquid is provided in the electrolytic cell, the cathode frame is disposed in the electrolytic cell, and the isolation net is immersed below the surface of the cathode liquid.

[0028] By adopting the above technical solution, the isolation mesh is completely immersed in the catholy solution. When the electrolyte on the metal plate exiting the tank falls into the cathode frame, it flows back into the catholy solution in the tank, preventing crystal formation on the cathode frame. Furthermore, it ensures that the electrolyte continuously contacts the cathode plate within the containment space through the through-holes, while preventing the isolation mesh from contacting air and forming an oxide layer that affects conductivity, thus ensuring the stability of the electrolytic reaction. The design of the liquid level being higher than the isolation mesh further restricts dendrite growth in the lifting lug area towards the isolation mesh.

[0029] Furthermore, a liquid inlet mechanism is provided on the bottom surface of the electrolytic cell. The liquid inlet mechanism is separately provided from the cathode frame, and the liquid inlet mechanism is provided corresponding to the liquid inlet hole of the cathode frame.

[0030] By adopting the above technical solution, the separate design of the liquid inlet mechanism and the cathode frame avoids the rigid connection between the two. Even if the cathode frame is slightly displaced due to accidental force, the metal plate stuck to the frame or sticking to the frame will not affect the tank exit operation, nor will it cause damage to the liquid inlet mechanism, thus reducing the probability of equipment failure. At the same time, it facilitates the independent maintenance and replacement of the liquid inlet mechanism.

[0031] Furthermore, the electrolysis system includes multiple independently arranged cathode frames.

[0032] By adopting the above technical solution, multiple independent cathode frames can perform electrolysis operations in parallel, which increases the metal output per unit time. Furthermore, the maintenance or replacement of a single cathode frame will not affect the operation of other units. Even if a cathode frame experiences jamming or sticking, it will not affect the normal use of other cathode frames, significantly improving the system's fault tolerance and production efficiency. This system is suitable for large-scale industrial production scenarios.

[0033] In summary, this application has at least one of the following beneficial technical effects:

[0034] 1. By setting up a separation space, the interference problem between the dendrites of the lifting lugs and the isolation net when the metal plate is removed from the slot is fundamentally solved, improving the smoothness of equipment operation and reducing production interruptions caused by jamming.

[0035] 2. The combination of optimized electrolyte circulation path (inlet hole + isolation mesh through hole) and independent inlet mechanism design not only improves the uniformity of metal deposition but also reduces equipment failure rate and ensures production continuity.

[0036] 3. The synergistic design of the baffle and the isolation net not only limits the deformation of the metal plate and the range of dendrite growth, but also protects auxiliary components such as the diaphragm bag, reducing production costs and maintenance intensity.

[0037] 4. The electrolysis system, composed of multiple independent cathode frames, improves production efficiency while maintaining operational flexibility, adapting to production needs of different scales and possessing strong industrial application value. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0039] Figure 1 This is a perspective view of the first embodiment of the cathode frame for easy removal from the slot according to this application;

[0040] Figure 2 A bottom view of the cathode frame in the first embodiment of the cathode frame for easy removal from the slot in this application;

[0041] Figure 3 This is a schematic diagram of the assembly state structure of the cathode frame according to the first embodiment of this application;

[0042] Figure 4 This is a cross-sectional view of the cathode frame assembly state according to the first embodiment of this application;

[0043] Figure 5 This is a schematic diagram of the structure of the second embodiment of the cathode frame for easy removal from the slot in this application;

[0044] Figure 6 This is a schematic diagram of the cathode frame assembly state according to the second embodiment of this application;

[0045] Figure 7 This is a schematic diagram of the structure of the third embodiment of the cathode frame for easy removal from the slot in this application;

[0046] Figure 8 This is a structural schematic diagram of the cathode frame assembly state according to the third embodiment of this application;

[0047] Figure 9 This is a schematic diagram of the fourth embodiment of the cathode frame for easy removal from the slot in this application;

[0048] Figure 10 This is a structural schematic diagram of the cathode frame assembly state according to the fourth embodiment of this application;

[0049] Figure 11 This is a schematic diagram of the fifth embodiment of the cathode frame for easy removal from the slot in this application;

[0050] Figure 12 This is a structural schematic diagram of the cathode frame assembly state according to the fifth embodiment of this application.

[0051] Figure label:

[0052] 1. Electrolytic cell; 2. Cathode frame; 21. Isolation net; 211. Through hole; 22. Baffle; 23. Suspension part; 24. Liquid inlet hole; 25. Accommodation space; 26. Top opening; 27. Support leg; 3. Cathode plate; 4. Lifting lug; 5. Cathode liquid level; 6. Liquid inlet mechanism; L. Predetermined safety distance. Detailed Implementation

[0053] The technical solutions of the present utility model 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 utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0054] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0055] In the description of this application, it should be understood that the terms "upper", "lower", "left", "right", 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 application 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, and therefore should not be construed as a limitation of this application.

[0056] The technical solutions of this application will be described in detail below with reference to the accompanying drawings and specific embodiments. Unless otherwise specified, the features in the following embodiments can be combined with each other.

[0057] Example 1

[0058] Please see Figures 1-4This embodiment provides a cathode frame for easy removal from the electrolytic cell, comprising a frame suitable for support on an electrolytic cell 1. The frame defines a receiving space 25 for receiving a cathode plate 3, and the cathode plate 3 is suspended in the receiving space 25 by its lifting lugs 4. The top of the receiving space 25 defines a top opening 26 for the cathode plate 3 to enter and exit the receiving space 25. The top opening 26 is configured such that when the cathode plate 3 is in the working state of being received in the receiving space 25, the top opening 26 is located below the lifting lugs 4, such that when viewed in a direction perpendicular to the cathode plate 3, there is no overlapping area between the cathode frame 2 and the lifting lugs 4, to prevent precipitates formed at the top opening 26 from jamming with the lifting lugs 4 and preventing the cathode plate 3 from separating from the cathode frame 2.

[0059] Please see Figure 1 and Figure 2 The frame has two cathode protection sections arranged opposite each other in the front-to-back direction, defining the top opening between the two cathode protection sections. The cathode protection section is an isolation mesh structure, and the upper edge of the isolation mesh 21 defines the boundary of the top opening 26. Suspension sections 23 are provided on the top of both sides of the cathode frame 2, and the cathode frame 2 is fixedly connected to the electrolytic cell 1 through the suspension sections 23. Baffles 22 are provided on both sides and / or the bottom of the cathode frame 2. The baffles 22 can limit the generated metal plate from protruding beyond the receiving space 25, effectively preventing the metal plate from sticking to the diaphragm bag due to deformation and protrusion, ensuring the forming quality of the metal plate and the service life of the diaphragm bag. At the same time, the bottom of the cathode frame 2 is also provided with a liquid inlet hole 24, which facilitates smoother entry and exit of the electrolyte into and out of the receiving space 25, improving the electrolyte circulation efficiency and reducing concentration polarization.

[0060] Please see Figure 3 and Figure 4 In operation, the cathode frame 2 is fixed to the electrolytic cell 1 via the suspension part 23, and the cathode plate 3 is connected to the lifting lug 4. The electrolytic cell 1 is filled with cathodic liquid, the cathode frame 2 is set inside the electrolytic cell 1, and the isolation net 21 and the top opening 26 are located below the cathodic liquid surface 5.

[0061] The cathode frame 2 is fixedly connected to the electrolytic cell 1 via the suspension part 23, ensuring stable placement of the cathode frame 2 during electrolysis. The cathode frame 2 is equipped with an isolation net 21. In this embodiment, the isolation net 21 is composed of crisscrossing isolation ribs, forming through holes 211 between the ribs for electrolyte inflow and outflow. The upper edge of the isolation net 21 is located below the cathode liquid surface 5, and the upper edge of the isolation net 21 corresponding to the lifting lug 4 is located below the lower edge of the lifting lug 4, leaving a predetermined safety distance L. This design creates a space between the isolation ribs and the lifting lug 4 for easy detachment. During the process of forming the metal plate of the cathode plate 3, uneven processing of the lifting lug 4 can lead to the formation of dendrites or large particles during electrodeposition. These can cause the metal plate to get stuck at the top of the cathode frame 2 during the removal process, resulting in the cathode frame 2 being carried out of the electrolytic cell 1 along with the metal plate. Because a predetermined safety distance L is set between the isolation net 21 and the lifting lug 4, when the cathode plate 3 enters or exits the cathode frame 2, the dendrites or particles attached to the lifting lug 4 will not come into contact with the isolation ribs, avoiding scratching and collision between the two. The value of L is set in the range of 10-200 mm, depending on different product requirements.

[0062] An inlet mechanism 6 is provided on the bottom surface of the electrolytic cell 1. The inlet mechanism 6 is separately arranged from the cathode frame 2, which avoids damage to the inlet mechanism 6 due to accidental movement of the cathode frame 2 and improves the reliability of the device. The inlet mechanism 6 is arranged corresponding to the inlet hole 24 to facilitate the flow of electrolyte.

[0063] Example 2

[0064] Please see Figure 5 and Figure 6 The cathode frame in this embodiment is similar in structure to that in embodiment 1. The top of both sides of the cathode frame 2 is provided with a suspension part 23, which is fixed to the electrolytic cell 1. The cathode frame 2 is provided with an isolation net 21. The upper edge of the isolation net 21 is located below the cathode liquid surface 5 and below the lifting lug 4, forming an effective detachment space.

[0065] The difference between this embodiment and Embodiment 1 is that, in this embodiment, the cathode frame 2 does not have metal plate retaining edges 22 on both sides, but a retaining edge 22 is provided at the bottom. During the process of forming the metal plate on the surface of the cathode plate 3, the retaining edge 22 at the bottom can limit the bottom of the metal plate, reducing the risk of the metal plate protruding. This design, while ensuring that the lifting lug 4 avoids contact with the isolation rib and reducing scratches and collisions, simplifies the structure of the cathode frame 2 and reduces manufacturing costs.

[0066] The bottom of the cathode frame 2 is also provided with a liquid inlet hole 24 to ensure the normal flow of electrolyte. The bottom surface of the electrolytic cell 1 is provided with a liquid inlet mechanism 6. The liquid inlet mechanism 6 is set separately from the cathode frame 2 to avoid damage to the liquid inlet mechanism 6 due to accidental movement of the cathode frame 2, thereby improving the reliability of the device.

[0067] Example 3

[0068] Please see Figure 7 and Figure 8 In this embodiment, the cathode frame 2, which facilitates the removal of electrolyte from the tank, is equipped with an isolation net 21. The through holes 211 between the isolation ribs provide a channel for the flow of electrolyte. The entire cathode frame 2 is located below the liquid level line, and the upper edge of the isolation net 21 is also below the liquid surface. The upper edge of the isolation net 21 is located below the lower edge of the lifting lug 4 of the cathode plate 3, leaving a predetermined safety distance L, so that a separation space is formed between the isolation rib and the lifting lug 4.

[0069] The cathode frame 2 has baffles 22 on both sides and bottom, which can effectively limit the metal plate from protruding out of the accommodating space 25 and prevent it from deforming and protruding from the through hole 211, sticking to the diaphragm bag and damaging the diaphragm bag.

[0070] The cathode frame 2 is provided with a support foot 27 at the bottom. The support foot 27 abuts against the bottom surface of the electrolytic cell 1, which plays a role in stabilizing the cathode frame 2 and enhancing the stability of the cathode frame 2 during the electrolysis process.

[0071] In some embodiments, the top of both sides of the cathode frame 2 may also be provided with a suspension part 23, which is connected to the electrolytic cell 1, further improving the installation stability of the cathode frame 2.

[0072] During the process of forming a metal plate on the surface of the cathode plate 3, the liquid inlet mechanism 6 on the bottom of the electrolytic cell 1 is located between the two support legs 27 below the cathode frame 2, and the liquid inlet mechanism 6 is set separately from the cathode frame 2 to ensure that the electrolyte can smoothly enter the accommodating space 25 in the cathode frame 2, promote the uniform precipitation of metal ions, and improve the quality of the metal plate.

[0073] Example 4

[0074] Please see Figure 9 and Figure 10 In this embodiment, the cathode frame 2 is located entirely below the cathode liquid surface 5, and the upper edge of the isolation net 21 is below the liquid surface. The upper edge of the isolation net 21 is located below the lower edge of the lifting lug 4 of the cathode plate 3, leaving a predetermined safety distance L, thus forming a separation space between the isolation rib and the lifting lug 4.

[0075] The cathode frame 2 is equipped with an isolation net 21 to ensure the normal flow of electrolyte. The bottom of the cathode frame 2 is equipped with support feet 27, which abut against the bottom surface of the electrolytic cell 1 to provide stable support for the cathode frame 2. The top of both sides of the cathode frame 2 is equipped with suspension parts 23, which are fixedly connected to the electrolytic cell 1. The double fixing method further improves the stability of the cathode frame 2.

[0076] Unlike Embodiment 3, this embodiment does not have baffles 22 on both sides and the bottom of the cathode frame 2. During the process of forming a metal plate on the surface of the cathode plate 3, this design, while ensuring stable operation of the device and preventing the lifting lugs 4 from contacting the isolation net 21, is suitable for situations where the metal plate is not prone to severe deformation, simplifying the structure and reducing processing difficulty and cost.

[0077] Example 5

[0078] Please see Figure 11 and Figure 12 The cathode frame in this embodiment, which facilitates slotting, differs from those in Embodiments 1 and 2 in that it lacks metal plate retaining edges 22 on both sides and the bottom. During the metal plate formation process on the cathode plate 3, there is a risk that the metal plate may protrude from the through-hole 211. This design is suitable for scenarios where metal plate deformation control is not critical. While ensuring that the lifting lug 4 avoids contact with the isolation rib and reducing scratches and collisions, it simplifies the structure of the cathode frame 2, reduces the material used in the cathode frame 2, and lowers manufacturing costs.

[0079] Example 6

[0080] This embodiment discloses an electrolysis system in which multiple independent cathode frames 2 can be arranged within the electrolytic cell 1. Each cathode frame 2 contains a cathode plate 3. Each cathode frame 2 is independent of the others, so even if one cathode frame 2 experiences jamming or sticking, it does not affect the normal operation of the other cathode frames 2, making it highly flexible. The simultaneous operation of multiple cathode frames 2 improves metal production efficiency, and the independent design ensures that maintenance of a single cathode frame 2 will not affect the normal operation of other cathode frames 2.

[0081] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principles of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A cathode frame for easy removal from an electrolytic cell, comprising a frame adapted for support on an electrolytic cell, the frame defining an accommodating space for receiving the cathode plate, the cathode plate being suspended within the accommodating space by means of its lugs; characterized in that: The top of the accommodating space defines a top opening for the cathode plate to enter and exit the accommodating space; The top opening is configured as follows: When the cathode plate is in the operating state of being received within the accommodating space, the top opening is located below the lifting lug, such that when viewed in a direction perpendicular to the cathode plate, there is no overlapping area between the cathode frame and the lifting lug, to prevent precipitates formed at the top opening from getting stuck with the lifting lug and preventing the cathode plate and cathode frame from separating.

2. The cathode frame for easy removal from the slot according to claim 1, characterized in that, The frame has two cathode protection portions arranged opposite each other in the front-rear direction, and the top opening is defined between the two cathode protection portions.

3. The cathode frame for easy removal from the slot according to claim 2, characterized in that, The protective part is an isolation net structure. The upper edge of the isolation net defines the boundary of the top opening. The upper edge area of ​​the isolation net corresponding to the lifting lug is set at a predetermined safety distance L below the lower edge of the lifting lug.

4. The cathode frame for easy removal from the slot according to claim 1, characterized in that, The cathode frame is provided with a suspension part, and the cathode frame is fixed to the electrolytic cell through the suspension part.

5. The cathode frame for easy removal from the slot according to claim 1, characterized in that, The cathode frame is provided with legs, which are used to support and fix the bottom of the electrolytic cell.

6. The cathode frame for easy removal from the slot according to claim 1, characterized in that, The cathode frame is provided with baffles on both sides and / or the bottom, which are used to prevent the metal plate generated on the cathode plate surface from protruding outside the accommodating space due to deformation.

7. An electrolysis system, characterized in that, It includes an electrolytic cell and a cathode frame as described in claims 1-6 for easy removal from the cell. The electrolytic cell is filled with cathodic liquid, the cathode frame is disposed in the electrolytic cell, and the top opening is immersed below the surface of the cathodic liquid.

8. The electrolysis system according to claim 7, characterized in that, The bottom surface of the electrolytic cell is provided with a liquid inlet mechanism, which is separately disposed from the cathode frame.

9. The electrolysis system according to claim 8 of claim 3, characterized in that, The bottom of the cathode frame is provided with an inlet hole to facilitate the entry and exit of electrolyte into the accommodating space, and the inlet mechanism is provided corresponding to the inlet hole.

10. The electrolysis system according to claim 7, characterized in that, It includes multiple independently arranged cathode frames.

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