Anode preheating device
By accurately controlling the height and range of the electromagnetic heating unit in the anode preheating device, the problems of low heating efficiency and large losses in the prior art are solved, and an efficient and low loss anode preheating effect is achieved.
Patent Information
- Application Number
- CN202422155338.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-03
- Publication Date
- 2025-07-08
- Estimated Expiration
- 2034-09-03
AI Technical Summary
The existing anode preheating device has problems such as low heating efficiency and causing losses and deformation to the anode structure, especially the impact on aluminum guide rods and steel claws.
An anode preheating device is designed, including a container unit and an electromagnetic heating unit. By precisely controlling the height and range of the electromagnetic heating unit, it avoids excessive heating of the aluminum guide rod and steel claws, and only efficient heating of the carbon block is carried out.
It improves the anode preheating efficiency, reduces the loss and deformation of the anode structure, especially the damage to the aluminum guide rod and steel claws, and improves the overall safety and service life.
Smart Images
Figure CN223074283U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the aluminum electrolysis industry, specifically, to an anode preheating device. Background Art
[0002] In the aluminum electrolysis industry, anodes are consumables and are continuously consumed during the production process, requiring regular replacement and replenishment.
[0003] The production temperature of an aluminum electrolysis cell is above 900 °C. If the anode directly enters the electrolysis cell without preheating and is heated to the operating temperature, it takes a long time, seriously affecting the production efficiency of the aluminum electrolysis cell.
[0004] Therefore, the anode needs to go through a preheating process before being put into production to reduce the temperature difference with the operating temperature, thereby avoiding affecting the production efficiency.
[0005] The overall structure of the anode includes an aluminum busbar, steel claws, and carbon blocks. The lower end of the steel claws is buried in the carbon blocks, and the bottom end of the aluminum busbar is welded to the top of the steel claws to form an anode assembly. Among them, the core functional component that needs to be preheated during production is the carbon block.
[0006] Currently, the preheating methods of anodes include natural gas combustion heating, electromagnetic heating, heat conduction, etc. However, all these heating methods have relatively rough problems. There is a heating process for the whole anode, but usually only the carbon block needs to be heated. Heating the steel claws and aluminum busbars will cause deformation and loss of these structures, and electromagnetic heating has the greatest impact.
[0007] To solve the above problems, further design is needed based on the theory of electromagnetic heating to make the heating efficiency higher and the loss and damage to the anode smaller.
[0008] To solve the above existing problems, people have been seeking an ideal technical solution. Summary of the Utility Model
[0009] The purpose of the utility model is to address the deficiencies of the prior art, and thus provide an anode preheating device with higher heating efficiency and less loss and damage to the anode.
[0010] To achieve the above purpose, the technical solution adopted by the utility model is: an anode preheating device, including a container unit and an electromagnetic heating unit;
[0011] An anode placement cavity is provided in the container unit, and the electromagnetic heating unit is arranged around the anode placement cavity for electromagnetic heating of the content in the anode placement cavity;
[0012] A first height is set in the anode placement cavity, and the first height corresponds to the height where the anode steel claws are connected to the anode busbar when placed.
[0013] The upper boundary of the coil of the electromagnetic heating unit is lower than or equal to the first height.
[0014] Based on the above, a second height lower than the first height is set in the anode placement cavity, the upper boundary of the anode carbon block placed correspondingly is at the second height, and the upper boundary of the coil of the electromagnetic heating unit is lower than or equal to the second height.
[0015] Based on the above, a third height lower than the second height is set in the anode placement cavity, the lowest point where the anode steel claw placed in the anode placement cavity is buried inside the anode carbon block is at the third height, and the upper boundary of the coil of the electromagnetic heating unit is lower than or equal to the third height.
[0016] Based on the above, a fourth height lower than the third height is set in the anode placement cavity, the fourth height corresponds to half of the overall height of the anode carbon block placed, and the upper boundary of the coil of the electromagnetic heating unit is lower than or equal to the fourth height.
[0017] Based on the above, the upper boundary of the coil is always aligned with the upper boundary of the anode placement cavity.
[0018] Based on the above, the upper boundary of the coil is always lower than the upper boundary of the anode placement cavity.
[0019] Based on the above, the cross-section perpendicular to the axis of the coil of the electromagnetic heating unit is substantially annular, and the cross-section perpendicular to the axis of the side wall of the anode placement cavity is substantially annular.
[0020] Based on the above, the container unit includes a top cover for closing the anode placement cavity, and corresponding holes are provided on the top cover for the anode guide rod or the anode steel claw or the anode carbon block.
[0021] Based on the above, a sandwich layer is provided in the container unit, the electromagnetic heating coil of the electromagnetic heating unit is arranged in the sandwich layer, and the material of the container body is a non-metallic material.
[0022] Based on the above, a cooling unit is provided in the container unit, and the cooling unit is a water cooling pipeline or an oil cooling pipeline arranged in the container unit or an air cooling fin formed on the container unit.
[0023] Based on the above, the electromagnetic heating unit has a lower boundary of the coil, and the lower boundary of the coil extends to the bottom end of the anode placement cavity.
[0024] The utility model has substantial features and progress compared with the prior art. Specifically, based on the principle of electromagnetic heating, the utility model sets a container unit, and an anode placement cavity is arranged in the container unit for placing an anode. An electromagnetic heating unit is arranged around the anode placement cavity to heat the anode placed inside by electromagnetic heating. To ensure high-precision heating, improve efficiency, reduce losses and damage to the anode, a first height is set for the electromagnetic heating unit, and the first height corresponds to the connection between the steel claw and the anode rod in the anode, so as to avoid heating the aluminum anode rod, reduce the loss, heating deformation and even melting of the anode rod.
[0025] Furthermore, a second height is set, and the second height corresponds to the upper boundary of the anode carbon block, which can avoid most of the steel claws from being heated significantly, reducing the loss, heating deformation and even melting of the steel claws.
[0026] Furthermore, a third height is set, corresponding to the lowest point where the steel claw is buried in the carbon block, which can basically avoid the steel claw from being heated significantly, and further reduce the loss, heating deformation and even melting of the steel claw.
[0027] Furthermore, a fourth height is set, corresponding to half of the height of the carbon block, which basically avoids the significant heating of the steel claw and the rod, and ensures that the effective area of the carbon block is heated, with higher efficiency, less loss and damage. Description of the Drawings
[0028] Figure 1 It is the structural schematic diagram of the anode preheating device in Embodiment 1 of the utility model.
[0029] Figure 2 It is the structural schematic diagram of the anode preheating device in Embodiment 2 of the utility model.
[0030] Figure 3 It is the structural schematic diagram of the anode preheating device in Embodiment 3 of the utility model.
[0031] Figure 4 It is the structural schematic diagram of the anode preheating device in Embodiment 4 of the utility model.
[0032] In the figure: 1. Container unit; 2. Electromagnetic heating unit; 3. Anode placement cavity; 4. Anode rod; 5. Anode steel claw; 6. Anode carbon block; 7. Interlayer; 11. First height; 12. Second height; 13. Third height; 14. Fourth height. Specific Embodiments
[0033] The following is a detailed description of the technical solution of the utility model through specific embodiments.
[0034] Embodiment 1
[0035] As Figure 1 shown, an anode preheating device includes a container unit 1 and an electromagnetic heating unit 2.
[0036] An anode placement cavity 3 is provided in the container unit 1, and the electromagnetic heating unit 2 is arranged around the anode placement cavity 3 for electromagnetic heating of the contents in the anode placement cavity 3.
[0037] In this embodiment, the electromagnetic heating unit 2 includes a coil part and a control part. The coil part as the main body is arranged around the anode placement cavity 3, and the control part is used to control the output parameters of the coil part to control the output power and adjust the heating efficiency. In this embodiment, a sandwich layer 7 is provided in the container unit, and the electromagnetic heating coil of the electromagnetic heating unit is arranged in the sandwich layer, and the material of the container main body is a non-metallic material. In other embodiments, the electromagnetic heating coil can also be surrounded outside, embedded inside, or exposed.
[0038] A first height 11 is provided in the anode placement cavity 3, and the first height 11 corresponds to the height at the connection of the anode steel claw 5 and the anode guide rod 4 placed therein. The upper boundary of the coil of the electromagnetic heating unit 2 is lower than or equal to the first height 11.
[0039] The electromagnetic heating unit has a lower boundary of the coil, and the lower boundary of the coil extends to the bottom end of the anode placement cavity.
[0040] In the design of the shape, in this embodiment, the cross-section of the coil of the electromagnetic heating unit perpendicular to the axis is substantially circular, and the cross-section of the side wall of the anode placement cavity perpendicular to the axis is substantially circular.
[0041] Technical principle description:
[0042] The inner space of the coil in the electromagnetic heating unit is the effective area for electromagnetic induction heating, and the heating energy of the part outside this area is limited.
[0043] For the entire anode assembly, since the anode guide rod is made of aluminum, electromagnetic heating has a greater impact on the guide rod and is easily softened and deformed during the heating process. If the heating power is large, it may even cause direct melting and damage. Therefore, in this embodiment, the upper boundary of the coil of the electromagnetic heating unit is set at the first height, which can avoid overheating of the anode guide rod. While ensuring the safety of the anode guide rod, due to the more specific and fewer heating objects, the heating efficiency will be higher and the overall safety of the anode assembly will be higher.
[0044] Embodiment 2
[0045] As Figure 2As shown in the figure, the main difference between this embodiment and Embodiment 1 is that: a second height 12 lower than the first height 11 is set in the anode placement cavity 3, the upper boundary of the anode carbon block 6 placed corresponding to the second height 12, and the upper boundary of the coil of the electromagnetic heating unit 2 is lower than or equal to the second height 12.
[0046] Technical principle description:
[0047] Similar to the principle of Embodiment 1, the steel claw is also made of metal and is relatively greatly affected by electromagnetic heating. To further ensure the safety of the steel claw, the upper boundary of the coil of the electromagnetic heating unit is controlled to be at most the upper boundary of the anode carbon block 6, which can protect the steel claw.
[0048] Embodiment 3
[0049] As Figure 3 shown, a third height 13 lower than the second height 12 is set in the anode placement cavity. The lowest point where the anode steel claw placed in the anode placement cavity is buried inside the anode carbon block is the third height 13, and the upper boundary of the coil of the electromagnetic heating unit is lower than or equal to the third height.
[0050] This embodiment is a further optimized solution based on Embodiment 2. Since the bottom end of the steel claw is buried in the carbon block by a certain height, to ensure the safety of the steel claw to the greatest extent, the height of the coil of the electromagnetic heating unit is further reduced to exclude any area containing the steel claw, and the heating amplitude of the steel claw is limited, thereby ensuring the safety of the steel claw.
[0051] Embodiment 4
[0052] As Figure 4 shown, a fourth height 14 lower than the third height 13 is set in the anode placement cavity. The fourth height 14 corresponds to half of the overall height of the anode carbon block 6 placed, and the upper boundary of the coil of the electromagnetic heating unit is lower than or equal to the fourth height.
[0053] In the working conditions of the anode carbon block, the main used part of the anode carbon block is not the entire anode carbon block, but the lower half of the carbon block. Therefore, concentrating the heating part of the electromagnetic heating unit in the lower half area of the carbon block has higher efficiency.
[0054] Embodiment 5
[0055] The upper boundary of the coil is always aligned with the upper boundary of the anode placement cavity, that is, the height of the anode placement cavity is equal to the height of the area to be heated.
[0056] In other embodiments, the upper boundary of the coil is always at least 5 cm lower than the upper boundary of the anode placement cavity, so that most of the lower part of the entire anode can be placed in the cavity.
[0057] In other embodiments, the container unit includes a top cover for closing the anode placement cavity, and corresponding holes are provided on the top cover for the anode guide rod, anode steel claw or anode carbon block.
[0058] In a preferred embodiment, a cooling unit is provided in the container unit, and the cooling unit is a water cooling pipeline or an oil cooling pipeline provided in the container unit or an air cooling fin formed on the container unit.
[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them; although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that it is still possible to modify the specific implementation manners of the present invention or perform equivalent replacements on some technical features; without departing from the spirit of the technical solutions of the present invention, they should all be covered within the scope of the technical solutions claimed by the present invention.
Claims
1. An anode preheating device, characterized in that: It includes a container unit and an electromagnetic heating unit; An anode placement cavity is provided in the container unit, and the electromagnetic heating unit is arranged around the anode placement cavity for electromagnetic heating of the content in the anode placement cavity; A first height is set in the anode placement cavity, and the first height corresponds to the height at the connection of the anode steel claw and the anode rod placed therein; The upper boundary of the coil of the electromagnetic heating unit is lower than or equal to the first height.
2. The anode preheating device according to claim 1, wherein: A second height lower than the first height is set in the anode placement cavity, and the second height corresponds to the upper boundary of the anode carbon block placed therein. The upper boundary of the coil of the electromagnetic heating unit is lower than or equal to the second height.
3. The anode preheating device according to claim 1 or 2, characterized in that: A third height lower than the second height is set in the anode placement cavity. The lowest point where the anode steel claw placed in the anode placement cavity is buried inside the anode carbon block is the third height. The upper boundary of the coil of the electromagnetic heating unit is lower than or equal to the third height.
4. The anode preheating device according to claim 3, wherein: A fourth height lower than the third height is set in the anode placement cavity, and the fourth height corresponds to half of the overall height of the anode carbon block placed therein. The upper boundary of the coil of the electromagnetic heating unit is lower than or equal to the fourth height.
5. The anode preheating device according to claim 1 or 2 or 4, characterized in that: The upper boundary of the coil is always aligned with the upper boundary of the anode placement cavity or lower than the upper boundary of the anode placement cavity.
6. The anode preheating device according to claim 1 or 2 or 4, characterized in that: The cross-section of the coil of the electromagnetic heating unit perpendicular to the axis is substantially annular, and the cross-section of the side wall of the anode placement cavity perpendicular to the axis is substantially annular.
7. The anode preheating device according to claim 6, characterized in that: The container unit includes a top cover for closing the anode placement cavity, and corresponding holes are provided on the top cover for the anode rod or anode steel claw or anode carbon block.
8. The anode preheating device according to claim 1 or 2 or 4, characterized in that: A sandwich layer is provided in the container unit, and the electromagnetic heating coil of the electromagnetic heating unit is arranged in the sandwich layer. The material of the container unit is a non-metallic material.
9. The anode preheating device according to claim 8, wherein: A cooling unit is provided in the container unit, and the cooling unit is a water cooling pipeline or an oil cooling pipeline provided in the container unit or an air cooling fin formed on the container unit.
10. The anode preheating device according to claim 1 or 2 or 4, characterized in that: The electromagnetic heating unit has a lower boundary of the coil, and the lower boundary of the coil extends to the bottom end of the anode placement cavity.