Bayonet self-locking anode assembly structure

Abstract

The utility model belongs to aluminium electrolysis technical field especially relates to a bayonet type self -locking anode assembly structure, including anode steel sheet and anode carbon block, the anode steel sheet includes at least one connecting steel sheet, the bottom side of connecting steel sheet is integrally provided with connecting block, the anode carbon block is seted up with dovetail groove corresponding with connecting block, the connecting block sets up in dovetail groove, and the clearance of connecting block and dovetail groove is filled with conductive layer. This technology cancels traditional anode steel claw and phosphorus pig casting process, carries out assembly under normal temperature, and the mode of anode assembly is optimized comprehensively, and the energy -conserving effect is more obvious, provides new technical scheme for electrolytic aluminium energy -conserving and emission reduction, effectively overcomes the technical problems such as high energy consumption, high assembly cost, residual anode cleaning difficulty in traditional electrolytic aluminium process. Connect with dovetail groove mode, fill with iron -based or carbon -based conductive material, compared with traditional phosphorus pig casting assembly process, has remarkable advantage in reducing pressure drop.

Description

Technical Field

[0001] This utility model belongs to the field of aluminum electrolysis technology, and in particular relates to a bayonet-type self-locking anode assembly structure. Background Technology

[0002] In the field of aluminum electrolytic anode assembly, "anode carbon block, steel claw, and anode guide rod" is currently the most mainstream and mature connection method for prebaked anode electrolytic cells, commonly referred to as "phosphorus pig iron casting" or "cast connection". Its advantages are high mechanical strength and stable process.

[0003] However, this traditional method also has some drawbacks: the traditional anode steel claw and phosphorus pig iron casting process involves assembly at high temperatures, resulting in high energy consumption (requiring the melting of molten iron), multiple production steps, high assembly costs, and a slow increase in contact resistance between the steel claw and the carbon block due to their different coefficients of thermal expansion. Furthermore, the recycling and disposal of waste anode assemblies is quite complex. Moreover, in the context of energy conservation, emission reduction, and power rationing, the traditional high-temperature assembly method has limited effectiveness in "reducing voltage drop." Utility Model Content

[0004] In view of the technical problems existing in the background art, this utility model provides a bayonet-type self-locking anode assembly structure.

[0005] To achieve the above objectives, the technical solution provided by this utility model is as follows: A bayonet-type self-locking anode assembly structure includes an anode steel plate and an anode carbon block. The anode steel plate includes at least one connecting steel plate. A connecting block is integrally provided on the bottom side of the connecting steel plate. A dovetail groove corresponding to the connecting block is opened on the anode carbon block. The connecting block is disposed in the dovetail groove, and a conductive layer is filled in the gap between the connecting block and the dovetail groove. The conductive layer is made of iron-based conductive material and / or carbon-based conductive material.

[0006] Optionally, two connecting steel plates are provided, and the upper ends of the two connecting steel plates are integrally connected by a fixing block, and two dovetail grooves are provided.

[0007] Optionally, the connecting steel plate and the dovetail groove are configured to have a variety of different mating depths.

[0008] Optionally, the dovetail groove includes a bottom side plane and a side slope, and the shape of the connecting block is the same as the shape of the dovetail groove.

[0009] Optionally, the dovetail groove includes a bottom side plane, a side inclined surface, and a vertical limiting surface, and the shape of the connecting block is the same as the shape of the dovetail groove.

[0010] Optionally, the thickness of the conductive layer increases sequentially on the bottom plane, the side slope, and the vertical limiting surface.

[0011] Optionally, the dovetail groove is provided on one side through the end of the anode carbon block, the length of the connecting block is less than the length of the dovetail groove, and after the connecting block is placed in the dovetail groove, the through end of the dovetail groove is filled with a carbon block filling layer.

[0012] Optionally, a through groove is provided between the connecting steel plate and the connecting block.

[0013] Optionally, the fixing block is provided with an aluminum-steel explosion weld block, and an aluminum guide rod is provided at the upper end of the aluminum-steel explosion weld block.

[0014] Optionally, the conductive layer may be made of an iron-based conductive material, a carbon-based conductive material, or a composite conductive material with a carbon-based conductive material on the outside and an iron-based conductive material on the inside.

[0015] This utility model has the following advantages and beneficial effects: This technology eliminates the traditional anode steel claws and phosphorus pig iron casting process, and assembles the anodes at room temperature, comprehensively optimizing the anode assembly method and resulting in more significant energy-saving effects. It provides a new technical solution for energy conservation and emission reduction in electrolytic aluminum, effectively overcoming technical challenges such as high energy consumption, high assembly costs, and difficulty in cleaning residual anodes in traditional electrolytic aluminum processes.

[0016] Against the backdrop of energy conservation, emission reduction, and power rationing, "reducing voltage drop" is a key indicator directly related to production costs and viability. The room-temperature steel plate assembly process, using dovetail joints and filled with iron-based and / or carbon-based conductive materials, offers significant advantages in reducing voltage drop compared to the traditional pig iron casting assembly process. The room-temperature steel plate assembly process can reduce the voltage drop of the entire anode assembly (from the guide rod to the carbon block) by approximately 30%-60% compared to the pig iron process.

[0017] 1. Eliminate the resistance of pig iron itself: The room temperature steel plate process uses iron-based or carbon-based conductive materials to achieve surface contact. This method avoids the high-resistance pig iron link, thereby eliminating this part of the voltage drop.

[0018] 2. Improved contact interface and reduced contact resistance: Although pig iron is liquid during casting and can fill voids, during cooling and subsequent heating, the significant differences in the thermal expansion coefficients of steel, iron, and carbon create tiny gaps and stresses at the interface, leading to an increase in contact resistance over time. In contrast, room-temperature steel plate processing uses iron-based or carbon-based conductive materials to fill all microscopic irregularities, forming a large and dense conductive surface. These materials possess inherent elasticity, better absorbing and buffering thermal stress, maintaining the stability of the contact interface, and keeping the contact resistance at a low and stable level.

[0019] 3. Optimized Current Distribution: In the pig iron phosphorus process, current flows from the guide rod to the "toes" of the steel claw, and then through the pig iron phosphorus into the carbon block. The current lines are concentrated at the toes, which can easily lead to excessively high local current density. In contrast, the room temperature steel plate process typically uses a plate connection, where the current flows from the guide rod through the entire steel plate and is evenly distributed across the entire contact surface of the carbon block. This uniform current distribution avoids localized overheating, reduces overall ohmic losses, and further lowers the voltage drop. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the bayonet-type self-locking anode assembly structure in this utility model; Figure 2 This is an assembly structure diagram of the anode steel plate and anode carbon block in this utility model; Figure 3 This is a cross-sectional view of the anode steel plate and anode carbon block at the first assembly depth in this utility model; Figure 4 This is a structural diagram of the anode carbon block in this utility model; Figure 5 for Figure 4 The left view; Figure 6 This is one of the structural diagrams of the anode steel plate in this utility model; Figure 7 This is the second structural diagram of the anode steel plate in this utility model; Figure 8 for Figure 6 The left view; Figure 9 for Figure 8 A cross-sectional view along the AA direction; Figure 10 This is a structural diagram of the iron-based conductive material layer and / or carbon-based conductive material layer filled between the dovetail groove of the anode carbon block and the anode steel plate in this utility model. Figure 11 for Figure 10 The right view; Figure 12 This is a structural diagram of the carbon block filling layer in this utility model; Figure 13 This is a cross-sectional view of the anode steel plate and anode carbon block at the second assembly depth in this utility model; Figure 14 This is a cross-sectional view of the anode steel plate and anode carbon block at the third assembly depth in this utility model.

[0021] Reference numerals: 1-Anode carbon block, 11-Dovetail groove, 111-Bottom side plane, 112-Side slope, 113-Vertical limiting surface, 2-Anode steel plate, 21-Connecting steel plate, 22-Connecting block, 23-Fixing block, 24-Through groove, 3-Carbon block filling layer, 4-Aluminum-steel explosion weld block, 5-Aluminum guide rod, 6-Conductive layer, 61-Bottom side conductive layer, 62-Side conductive layer, 63-Vertical conductive layer. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0023] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0024] Example like Figures 1-12 As shown, a bayonet-type self-locking anode assembly structure includes an anode steel plate 2 and an anode carbon block 1. The anode steel plate 2 includes at least one connecting steel plate 21, and a connecting block 22 is integrally provided on the bottom side of the connecting steel plate 21. The connecting block 22 has a conical plate structure. A dovetail groove 11 corresponding to the connecting block 22 is opened on the anode carbon block 1. The connecting block 22 is disposed in the dovetail groove 11. Through the connection method of the dovetail groove 11, the connecting block 22 can be stably and reliably connected to the anode carbon block 1, achieving an anti-detachment effect. The gap between the connecting block 22 and the dovetail groove 11 is filled with a conductive layer 6, which is made of iron-based conductive material and / or carbon-based conductive material. By filling the gap with the iron-based conductive material layer and / or carbon-based conductive material layer, the anode carbon block 1 and the connecting block 22 are reliably connected. The iron-based and / or carbon-based conductive material filling the gap forms a large and dense conductive surface and connection surface.

[0025] In this invention, the conductive layer 6 is made of iron-based conductive material, carbon-based conductive material, or a composite conductive material with carbon-based conductive material on the outside and iron-based conductive material on the inside.

[0026] As a preferred embodiment of this utility model, the conductive layer 6 can be selected by means of high-temperature phosphoric iron casting, room-temperature steel shot filling, or room-temperature carbon mortar (or steel carbon mortar, tamping paste), etc.

[0027] In a preferred embodiment of this invention, two connecting steel plates 21 are provided, and two dovetail grooves 11 are provided. The upper ends of the two connecting steel plates 21 are integrally connected by a fixing block 23. The fixing block 23 has a U-shaped structure, which stably connects the two connecting steel plates 21. To ensure the conductivity and connection strength of the anode steel plate 2, the anode steel plate 2 is manufactured by casting. The connection structure of double connecting steel plates 21 and double dovetail grooves 11 can enhance the connection reliability between the anode steel plate 2 and the anode carbon block 1, while increasing the conductive area.

[0028] In this invention, the connecting steel plate 21 and the dovetail groove 11 are configured to have various different mating depths. By varying the mating depths, the electrical conductivity can be adjusted, and the connection strength can also be modified.

[0029] Furthermore, a through groove 24 is provided between the connecting steel plate 21 and the connecting block 22. By opening the through groove 24, the connecting steel plate 21 and the connecting block 22 can be allowed to expand to a certain extent at high temperatures, ensuring the overall connection strength is guaranteed.

[0030] like Figure 14 As shown, in a preferred embodiment of this utility model, the dovetail groove 11 includes a bottom side plane 111 and a side inclined surface 112, and the shape of the connecting block 22 is the same as the shape of the dovetail groove 11. (Refer to...) Figure 14 At this time, the height from the upper side of the through groove 24 to the upper end of the connecting block 22 is H3. That is to say, in this connection case, the height H3 is the minimum height. In this case, the connection and conductivity are achieved by relying on the conductive layer 6 on the bottom plane 111 and the side slope 112.

[0031] like Figure 3 and Figure 13 As shown, in another preferred embodiment of this utility model, the dovetail groove 11 includes a bottom side plane 111, a side inclined surface 112, and a vertical limiting surface 113. The shape of the connecting block 22 is the same as the shape of the dovetail groove 11. In this case, the dovetail groove 11 adds a vertical limiting surface 113. (Refer to...) Figure 3 At this time, the height from the upper side of the through groove 24 to the upper end of the connecting block 22 is H1. (Refer to...) Figure 13 At this time, the height from the upper side of the through slot 24 to the upper end of the connecting block 22 is H2. H1 is greater than H2. Since the main function of the conductive layer 6 on the vertical limiting surface 113 is to conduct electricity, its conductivity also increases as the height H (i.e., the height from the upper side of the through slot 24 to the upper end of the connecting block 22) increases.

[0032] like Figure 3 and Figure 11As shown, in a preferred embodiment of this invention, the thickness of the conductive layer 6 increases sequentially on the bottom plane 111, the side slope 112, and the vertical limiting surface 113. The conductive layer 6 is respectively designated as a bottom conductive layer 61, a side conductive layer 62, and a vertical conductive layer 63 on the bottom plane 111, the side slope 112, and the vertical limiting surface 113. The thickness of the bottom conductive layer 61 is L1, the thickness of the side conductive layer 62 is L2, and the thickness of the vertical conductive layer 63 is L3.

[0033] First, the bottom conductive layer 61, the side conductive layer 62, and the vertical conductive layer 63 are all filled in the dovetail groove 11 to conduct electricity. Second, the side conductive layer 62 mainly serves as a connector, ensuring a stable connection of the anode steel plate 2 in the dovetail groove 11, while the vertical conductive layer 63 mainly serves as a conductor. Through the coordinated action of these three layers, a stable and reliable connection is achieved, while ensuring uniform conductivity.

[0034] In this invention, a dovetail groove 11 is provided on one side, extending through the end of the anode carbon block 1. This structure facilitates the insertion and connection of the anode steel plate 2, enabling room-temperature assembly. After the connecting block 22 of the anode steel plate 2 is inserted into the dovetail groove 11, an iron-based and / or carbon-based conductive material is filled between the dovetail groove 11 and the connecting block 22, and the material is compacted by vibration to form a conductive layer 6. The length of the connecting block 22 is less than the length of the dovetail groove 11. After the connecting block 22 is placed in the dovetail groove 11, a carbon block filling layer 3 is filled at the through end of the dovetail groove 11. The carbon block filling layer 3 fills the dovetail groove 11, ensuring a reliable connection between the anode carbon block 1 and the anode steel plate 2.

[0035] In this utility model, an aluminum-steel explosion welding block 4 is provided on the fixing block 23, and an aluminum guide rod 5 is provided at the upper end of the aluminum-steel explosion welding block 4, thereby forming a complete anode assembly structure.

[0036] This anode assembly structure eliminates the traditional anode steel claws and phosphorus pig iron casting process, and is assembled at room temperature. It comprehensively optimizes the anode assembly method, resulting in more significant energy-saving effects. It provides a new technical solution for energy conservation and emission reduction in electrolytic aluminum, and effectively overcomes the technical difficulties in traditional electrolytic aluminum processes, such as high energy consumption, high assembly costs, and difficulty in cleaning residual anodes.

[0037] This invention utilizes a room-temperature steel plate assembly process, connected via dovetail grooves 11, and filled with iron-based or carbon-based conductive materials. Compared to the traditional pig iron casting assembly process, it offers significant advantages in reducing pressure drop. The room-temperature steel plate assembly process can reduce the pressure drop of the entire anode assembly (from the guide rod to the carbon block) by approximately 30%-60% compared to the pig iron process.

[0038] 1. Eliminate the resistance of pig iron itself: In the room temperature steel plate process, iron-based or carbon-based conductive materials are used to fill the surface contact. This method avoids the high-resistance pig iron link, thereby eliminating this part of the voltage drop.

[0039] 2. Improved contact interface and reduced contact resistance: Although pig iron is liquid during casting and can fill voids, during cooling and subsequent heating, the significant differences in the thermal expansion coefficients of steel, iron, and carbon create tiny gaps and stresses at the interface, leading to an increase in contact resistance over time. In contrast, room-temperature steel plate processing uses iron-based or carbon-based conductive materials to fill all microscopic irregularities, forming a large and dense conductive surface. These materials possess inherent elasticity, better absorbing and buffering thermal stress, maintaining the stability of the contact interface, and keeping the contact resistance at a low and stable level.

[0040] 3. Optimized Current Distribution: In the pig iron phosphorus process, current flows from the guide rod to the "toes" of the steel claw, and then through the pig iron phosphorus into the carbon block. The current lines are concentrated at the toes, which can easily lead to excessively high local current density. In contrast, the room temperature steel plate process typically uses a plate connection, where the current flows from the guide rod through the entire steel plate and is evenly distributed across the entire contact surface of the carbon block. This uniform current distribution avoids localized overheating, reduces overall ohmic losses, and further lowers the voltage drop.

[0041] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A bayonet-type self-locking anode assembly structure, characterized in that: The anode includes an anode steel plate and an anode carbon block. The anode steel plate includes at least one connecting steel plate. A connecting block is integrally provided on the bottom side of the connecting steel plate. A dovetail groove corresponding to the connecting block is opened on the anode carbon block. The connecting block is disposed in the dovetail groove, and a conductive layer is filled in the gap between the connecting block and the dovetail groove. The conductive layer is made of iron-based conductive material and / or carbon-based conductive material.

2. The bayonet-type self-locking anode assembly structure according to claim 1, characterized in that: Two connecting steel plates are provided, and the upper ends of the two connecting steel plates are integrally connected by a fixing block. Two dovetail grooves are provided.

3. The bayonet-type self-locking anode assembly structure according to claim 1, characterized in that: The connecting steel plate and the dovetail groove are configured to have a variety of different mating depths.

4. The bayonet-type self-locking anode assembly structure according to claim 3, characterized in that: The dovetail groove includes a bottom plane and a side slope, and the shape of the connecting block is the same as the shape of the dovetail groove.

5. The bayonet-type self-locking anode assembly structure according to claim 3, characterized in that: The dovetail groove includes a bottom plane, a side slope, and a vertical limiting surface, and the shape of the connecting block is the same as the shape of the dovetail groove.

6. The bayonet-type self-locking anode assembly structure according to claim 5, characterized in that: The thickness of the conductive layer increases sequentially on the bottom plane, the side slope, and the vertical limiting surface.

7. The bayonet-type self-locking anode assembly structure according to claim 1, characterized in that: The dovetail groove is provided on one side through the end of the anode carbon block. The length of the connecting block is less than the length of the dovetail groove. After the connecting block is placed in the dovetail groove, the through end of the dovetail groove is filled with a carbon block filling layer.

8. The bayonet-type self-locking anode assembly structure according to claim 1, characterized in that: A through groove is provided between the connecting steel plate and the connecting block.

9. The bayonet-type self-locking anode assembly structure according to claim 2, characterized in that: An aluminum-steel explosion weld block is provided on the fixing block, and an aluminum guide rod is provided at the upper end of the aluminum-steel explosion weld block.

10. The bayonet-type self-locking anode assembly structure according to claim 1, characterized in that: The conductive layer is made of iron-based conductive material, carbon-based conductive material, or a composite conductive material with carbon-based conductive material on the outside and iron-based conductive material on the inside.

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