A round cathode steel rod capable of adjusting the horizontal current of an aluminum electrolytic cell
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI YUXUAN ENERGY-SAVING TECHNOLOGY CO LTD
- Filing Date
- 2024-09-28
- Publication Date
- 2026-08-07
AI Technical Summary
[0008]二是由于铝电解槽铝液层内向电解槽侧部传导的阴极水平电流过大，这样不仅会造成铝液磁流体对阴极炭块侧部炉帮的冲损，而且还会对阴极炭块侧端部电流输出集中处的上表面形成冲击磨损造成溶蚀坑；而且还会形成铝液磁流场的相互对冲，破坏磁流场的稳定性，使得铝电解槽的电流效率降低
[0018] By reading the above technical solution, it can be seen that the innovation of the present invention lies in configuring and manufacturing the circular cathode steel rod into two sections. The core of the technical approach is: first, to increase the conductivity of the cathode conductive output device at the conductive input end of the cathode steel rod, thereby increasing the output current density of the cathode current flowing through the cathode conductive input section; second, to appropriately reduce the intensity of the cathode current distribution at the cathode current output end, allowing the cathode current to be inclinedly distributed towards the center of the electrolytic cell. This achieves the goal of adjusting the cathode current output distribution state of the aluminum electrolytic cell, suppressing the generation of horizontal current, optimizing the conductivity of the aluminum electrolytic cell, and reducing the erosion of the cathode carbon block and side furnace walls by the horizontal magnetic flux field.
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Figure CN224605099U_ABST
Abstract
Description
Technical Field
[0001] A circular cathode steel rod with adjustable horizontal current in an aluminum electrolysis cell is mainly used in the construction of a cathode conductive output device for aluminum electrolysis cells. Background Technology
[0002] Existing cathode conductive output devices for aluminum electrolysis cells are mainly constructed from a combination of cathode carbon blocks and cathode steel rods. They serve two main functions: first, to conduct the cathode current from the molten aluminum layer within the electrolytic pool to the cathode busbar outside the bottom of the electrolysis cell; and second, to support the molten aluminum and electrolyte in the molten pool structure. The output method of the cathode current within the molten aluminum layer of the aluminum electrolysis cell not only affects the distribution of the electric field but also the distribution of the magnetofluid field and the flow velocity of the magnetofluid. This affects the current efficiency of the aluminum electrolysis cell, which is the key to the structural design of the cathode conductive output device. Existing cathode conductive output devices for aluminum electrolysis cells mainly have two structural configurations: one uses rectangular cathode steel rods and cathode carbon blocks, and the other uses circular cathode steel rods and cathode carbon blocks.
[0003] The existing cathode conductive output device for aluminum electrolysis cells, constructed using rectangular cathode steel rods and cathode carbon blocks, is characterized by the following structural features: a rectangular cathode steel rod is installed within a rectangular, bottom-opening concave steel rod groove at the bottom of the cathode carbon block; the rectangular cathode steel rod is constructed in the horizontally positioned cathode steel rod groove using tamping paste or cast iron. The rectangular cathode steel rod is connected at its lateral end to an aluminum-steel composite explosion-welded sheet and the cathode busbar, becoming the conductive output terminal of the cathode current in the aluminum electrolysis cell.
[0004] The existing aluminum electrolysis cell cathode conductive output device, which is constructed by configuring a common circular cathode steel rod and a cathode carbon block, has the following structural features: two circular cathode steel rods are installed symmetrically on the left and right sides in the cathode conductive output holes at both ends of the cathode carbon block, along the length of the cathode carbon block from the outside to the inside; the end of the circular cathode steel rod inserted into the conductive hole in the middle of the cathode carbon block is the conductive input end of the cathode current, and the end of the circular cathode steel rod that falls on the cathode conductive output hole side of the cathode carbon block and connects with the aluminum-steel composite explosion welded sheet and the cathode busbar is the conductive output end of the cathode current.
[0005] The design concept of the cathode conductive output device for existing aluminum electrolysis cells is as follows: Under ideal electrolysis conditions, the cathode current within the molten aluminum layer in the aluminum electrolysis cell should be evenly distributed on the upper surface of the cathode carbon block (i.e., the overcurrent density per unit surface area is equal). This current is then conducted vertically through the cathode carbon block to the horizontally arranged circular cathode steel rod within the cathode carbon block. The cathode current is then transmitted through the horizontally arranged cathode steel rod and output to the cathode busbar located at the end of the cathode steel rod, thus forming the cathode current conductive output circuit for the aluminum electrolysis cell. (See attached instruction manual for details.) Figure 1 ).
[0006] However, in the actual electrolytic aluminum production process, the existing cathode current output device of aluminum electrolytic cell has the following major technical defects.
[0007] Firstly, because the conductivity of the molten aluminum layer within the electrolytic cell is superior to that of the cathode carbon block and cathode steel rod, the cathode current within the molten aluminum layer conducts outwards through the path of least resistance-voltage drop when it is output to the bottom of the electrolytic cell. Specifically, the cathode current in the molten aluminum layer first passes through the conductors within the molten aluminum layer and conducts towards the side of the furnace wall, forming a horizontally offset current. Then, it conducts downwards through a certain area at the side end of the cathode carbon block and through the horizontally positioned cathode steel rod inside the cathode carbon block. Finally, it conducts through the conductive output end of the cathode steel rod to the aluminum-steel composite welded sheet, the flexible busbar, and the main cathode busbar, thus conducting the cathode current of the molten aluminum layer outwards. Therefore, one reason for the horizontal current generated within the molten aluminum layer is that the conductive input end of the cathode steel rod has a relatively weak capacity to receive and conduct cathode current; that is, the resistance of the current-carrying channel is relatively high.
[0008] Secondly, the excessively large horizontal cathode current conducted from the aluminum liquid layer to the side of the electrolytic cell not only causes damage to the furnace side of the cathode carbon block by the aluminum liquid magnetofluid, but also creates impact wear and corrosion pits on the upper surface of the current output concentration point at the end of the cathode carbon block. Furthermore, it causes mutual collisions in the aluminum liquid magnetofluid field, disrupting the stability of the magnetofluid field and reducing the current efficiency of the aluminum electrolytic cell. Utility Model Content
[0009] To optimize the conductivity and structural performance of the cathode conductive device in aluminum electrolysis cells, suppress and adjust the horizontal current within the aluminum electrolysis cell, and optimize the distribution of cathode current and magnetocurrent field, thereby improving the stability of the cathode conductive output device, this application discloses a technical solution for adjusting the horizontal current of the cathode in aluminum electrolysis cells using a circular cathode steel rod.
[0010] The circular cathode steel rod for adjusting the horizontal current of an aluminum electrolysis cell, as described in this invention, is based on the configuration of a circular cathode steel rod in a cathode carbon block assembly. Its technical feature is that a circular cathode steel rod assembled within the cathode carbon block is divided into two sections with conductive structures. Different conductive metal materials or conductive structures are used at the cathode current input end and the cathode current output end, allowing the circular cathode steel rod to form different potential differences after being combined with the cathode carbon block. The resistance value of the cathode steel rod's conductive input end (1-2) is less than the resistance value of its conductive output end (1-1). When applied to electrolysis cell production, the cathode current to be output from the molten aluminum layer in the aluminum electrolysis cell can be concentrated and output through the cathode carbon block to the low-resistance cathode current conductive input end region. This achieves a balanced distribution of the cathode current output density within the molten aluminum layer, suppresses the horizontal current conduction towards the sides, and reduces the impact and wear intensity and negative effects of the molten aluminum magnetic vortex on the side furnace walls and local cathode carbon blocks.
[0011] According to the above technical solution: a circular cathode steel rod (1) assembled in the cathode carbon block is divided into two sections with different conductive functions, and the resistance value of the cathode steel rod's conductive input end (1-2) is less than the resistance value of the cathode steel rod's conductive output end (1-1). This allows the cathode current existing in the middle of the aluminum liquid layer in the cathode molten pool of the aluminum electrolysis cell to be shifted and concentrated towards the middle region of the electrolysis cell during the conduction and output process, so as to suppress the intensity of the horizontal current generated in the aluminum liquid layer and reduce the concentrated erosion of the aluminum liquid horizontal current impact flow field on the side furnace wall and the upper surface of the cathode carbon block of the electrolysis cell.
[0012] According to the above technical solution: its circular cathode steel rod (1) is made of low carbon steel, its cathode current conductive output end (1-1) section is designed with a large diameter, and its cathode current conductive input end (1-2) section is designed with a small diameter. In order to improve the conductivity of the cathode current conductive input end (1-2), a conductive copper sleeve (10) is configured on the outside of the cathode steel rod electrical input end (1-2) section, thereby forming a cathode current output channel with a relatively low resistance value on the cathode conductive output device of the aluminum electrolysis cell molten pool, and providing support for the metal conductive component.
[0013] According to the above technical solution: its circular cathode steel rod (1) is divided into two sections for conductive structure design. A circular conductive copper sleeve or conductive copper tile (11) is set on the outside of the conductive input end of the circular cathode steel rod. The conductive copper sleeve or conductive copper tile (11) can be made into a continuous structure or a segmented structure at the conductive input end (1-2) of the circular cathode steel rod; thereby providing metal conductive component support for forming a cathode current output channel with a relatively low resistance value on the cathode conductive output device of the aluminum electrolysis cell molten pool.
[0014] According to the above technical solution: an arc-shaped conductive copper pad (12) is provided on the upper part of the conductive input end (1-2) of the circular cathode steel rod (1), thereby providing support for the metal conductive component to form a cathode current output channel with a relatively low resistance value on the cathode conductive output device of the aluminum electrolysis cell molten pool.
[0015] According to the above technical solution: its circular cathode steel rod (1) is divided into two sections for conductive structure design. The conductive input end (1-2) of the circular cathode steel rod (1) is constructed with a round copper rod (13) made of all copper material and the conductive output end (1-1) of the cathode steel rod made of low carbon steel material. The two can be connected by welding or by through-thread (14) connection, thereby forming a cathode current output channel with a relatively low resistance value on the cathode conductive output device and providing support for the metal conductive parts.
[0016] According to the above technical solution: the circular cathode steel rod (1) is divided into two sections for conductive structure design. The conductive input end (1-2) of the circular cathode steel rod (1) is constructed by using a threaded connecting rod (15) and the conductive output end (1-1) of the smooth circular cathode steel rod as an integral structure, thereby forming a cathode current output channel with a relatively low resistance value on the cathode conductive output device and providing support for the metal conductive parts.
[0017] According to the above technical solution: the circular cathode steel rod (1) is divided into two sections for conductive structure design. In order to reduce the connection voltage drop at the iron-carbon interface between the conductive input end (1-2) of the circular cathode steel rod (1) and the cathode carbon block, a copper conductive transition layer can be sprayed or plated onto the outer surface of the low-carbon steel material of the conductive input end (1-2) of the circular cathode steel rod (1). This forms a cathode current output channel with a relatively low resistance value on the cathode conductive output device, providing support for the metal conductive components.
[0018] By reading the above technical solution, it can be seen that the innovation of the present invention lies in configuring and manufacturing the circular cathode steel rod into two sections. The core of the technical approach is: first, to increase the conductivity of the cathode conductive output device at the conductive input end of the cathode steel rod, thereby increasing the output current density of the cathode current flowing through the cathode conductive input section; second, to appropriately reduce the intensity of the cathode current distribution at the cathode current output end, allowing the cathode current to be inclinedly distributed towards the center of the electrolytic cell. This achieves the goal of adjusting the cathode current output distribution state of the aluminum electrolytic cell, suppressing the generation of horizontal current, optimizing the conductivity of the aluminum electrolytic cell, and reducing the erosion of the cathode carbon block and side furnace walls by the horizontal magnetic flux field. Attached Figure Description
[0019] The technical features of the circular cathode steel rod for adjusting the horizontal current of an aluminum electrolysis cell described in this invention will become clearer by reading the accompanying drawings and the description of the specific embodiments.
[0020] Figure 1 This is a diagram showing the output path of the cathode current in an ideal cathode conduction output device under existing technology.
[0021] Figure 2 This is a diagram showing the path of cathode current output within the aluminum liquid layer of an existing aluminum electrolysis cell.
[0022] Figure 3 This is a schematic diagram of the cathode conductive output device and cathode current output path of the present invention in Example 1.
[0023] Figure 4 This is a schematic diagram of a circular cathode steel rod structure with a conductive copper sleeve installed at the cathode current conductive input end, as shown in Example 2.
[0024] Figure 5 for Figure 4 Top view.
[0025] Figure 6 This is a schematic diagram of a circular cathode steel rod structure with multiple conductive copper sleeves at the cathode current conductive input end, as shown in Example 3.
[0026] Figure 7 for Figure 6 Top view.
[0027] Figure 8 This is a schematic diagram of a circular cathode steel rod structure with a conductive copper pad at the cathode current input terminal, as shown in Example 4.
[0028] Figure 9 For Figure 8 Top view.
[0029] Figure 10 This is a structural diagram of a circular cathode steel rod in Example 5, in which the circular cathode steel rod is divided into two sections and the cathode current conductive input terminal is set as a copper rod.
[0030] Figure 11 for Figure 10 Top view
[0031] Figure 12 This is a structural diagram of a circular cathode steel rod divided into two sections, with a threaded structure at the cathode current conductive input end, as shown in Embodiment 6 of the present invention.
[0032] Figure 13 for Figure 12 Top view
[0033] The figure shows: 1. Circular cathode steel rod, 1-1 cathode current output end of cathode steel rod, 1-2 cathode current input end of cathode steel rod, 2. Cathode carbon block, 3. Aluminum liquid layer, 4. Side furnace wall, 5. Aluminum-steel composite connecting block, 6. Flexible busbar connecting strip, 7. Cathode busbar, 8. Cathode current, 9. Cathode current output diameter, 10. Conductive copper sleeve, 11. Tile-shaped conductive copper sleeve, 12. Arc-shaped conductive copper pad, 13. Circular conductive copper rod, 14. Threaded connecting rod, 15. Threaded rod. Detailed Implementation
[0034] The technical features of the circular cathode steel rod shown in this invention become clearer through the following description of the embodiments.
[0035] Example 1: As Figure 3 As shown, the innovation of the circular cathode steel rod for cathode conductive output device of the present invention is that: a circular cathode steel rod (1) assembled in the cathode carbon block is divided into left and right sections, that is, the part assembled in the inner end of the cathode carbon block is regarded as the cathode current conductive input end (1-2); the part set in the conductive output end on the side of the cathode carbon block is regarded as the cathode current conductive output end (1-1).
[0036] Through reading Figure 2 and Figure 3 Comparison reveals that to reduce the intensity of the horizontal current in the aluminum liquid cathode layer, the cathode current in the aluminum liquid layer can be directly conducted vertically through the cathode carbon block to the horizontally set circular cathode steel rod, and then horizontally through the cathode steel rod to the aluminum-steel composite connecting block (5), the flexible busbar connecting strip (6), and the cathode busbar (7), thus achieving the ideal cathode current distribution, conduction, and output function. Figure 1 As shown, the key point of its innovative technical solution is: a circular cathode steel rod horizontally positioned within the cathode carbon block of the cathode current conductive output device is designed to be divided into two zones with different conductive functions. This ensures that the resistance value of the cathode steel rod's conductive input end (1-2) is less than the resistance value of its conductive output end (1-1). This allows the cathode current in the molten aluminum layer to be shifted and concentrated towards the relatively lower resistance region (1-1) of the cathode steel rod in the middle of the electrolytic cell during the output process. This effectively suppresses the current energy generated by the horizontal current within the molten aluminum layer and reduces the erosive impact intensity of the molten aluminum flow field on the furnace sides and cathode carbon block of the electrolytic cell.
[0037] Example 2: As Figure 3 Figure 4 and Figure 5As shown: The main material of the circular cathode steel rod (1) of the present invention is made of low carbon steel. In order to make the current (8) to be output and conducted in the aluminum liquid layer be conducted to the outside of the tank through the cathode carbon block (2) and the horizontally arranged circular cathode steel rod, the resistance value of the cathode conductive input end (1-2) of the circular cathode steel rod (1) must be less than the resistance value of the cathode conductive output end (1-1). Therefore, in the overall structural design of the circular cathode steel rod, the circular cathode steel rod is divided into two sections with different diameters. The conductive output end (1-1) section is of large diameter and the conductive input end (1-2) section is of small diameter. In order to improve the conductivity of the conductive input end (1-2) of the cathode steel rod, a conductive copper sleeve (10) is arranged outside the conductive input end (1-2) section of the cathode steel rod. The conductive copper sleeve is constructed by inlay extrusion on the outside of the conductive input end (1-2) section of the circular cathode steel rod made of steel material, or a layer of copper conductive material is sprayed on the outside of the small diameter cathode conductive input end (1-2) section. After assembling the circular cathode steel rod 1 into the cathode carbon block, the superior conductivity of its conductive copper sleeve material compared to the aluminum liquid layer (8) and the greater linear expansion coefficient of the copper material compared to the cathode carbon block (2) can be utilized to reduce the contact voltage drop between the iron-carbon interface of the cathode carbon block and the cathode steel rod. This creates a relatively low-resistance current output channel on the cathode conductive output device, allowing the cathode current to be conducted and output from the aluminum liquid layer to the conductive output end (1-1) of the circular cathode steel rod via the conductive input end (1-2). Figure 3 As shown.
[0038] Example 3 Figure 6 , Figure 7 As shown: In order to suppress the generation and impact intensity of horizontal current in the aluminum liquid layer in the aluminum electrolysis cell, increase the incremental intensity of the cathode current in the aluminum liquid layer through the cathode carbon block and the current input to the circular cathode steel rod, so that the cathode output current can be shifted to the middle of the electrolysis cell, when designing and constructing the cathode conductive output device, the circular cathode steel rod (1) is divided into two sections for conductive structure design. A circular conductive copper sleeve or conductive copper tile (11) is set on the outside of the conductive input end of the circular cathode steel rod. The conductive copper sleeve or conductive copper tile (11) can be made into a continuous structure or a segmented structure at the conductive input end (1-2) of the circular cathode steel rod. After the circular cathode steel rod 1 is assembled into the cathode carbon block, the conductivity of its circular conductive copper sleeve or conductive copper tile (11) material is better than that of the aluminum liquid layer (8), and the linear expansion coefficient of copper material is greater than that of the cathode carbon block (2). This reduces the contact voltage drop between the iron-carbon interface of the cathode carbon block and the cathode steel rod, thereby forming a cathode current output channel with a relatively low resistance value on the cathode conductive output device.
[0039] Example 4: Figure 8 , Figure 9 As shown, in order to suppress the generation and impact intensity of horizontal current in the aluminum liquid layer in the aluminum electrolysis cell, and to increase the incremental intensity of the cathode current in the aluminum liquid layer that is vertically conducted to the circular cathode steel rod through the cathode carbon block, so that the cathode output current can be shifted to the middle of the electrolysis cell, the circular cathode steel rod (1) is divided into two sections for conductive structure design when designing and constructing the cathode conductive output device. An arc-shaped conductive copper pad (12) is set on the upper part of the conductive input end (1-2) of the circular cathode steel rod (1). After the circular cathode steel rod 1 is assembled into the cathode carbon block, the conductivity of the arc-shaped conductive copper pad (12) material is better than that of the aluminum liquid layer (8) and the linear expansion coefficient of copper material is greater than that of the cathode carbon block (2), thereby reducing the contact voltage drop between the iron-carbon interface of the cathode carbon block and the cathode steel rod, thus forming a cathode current output channel with a relatively low resistance value on the cathode conductive output device.
[0040] Example 5: Figure 10 , Figure 11 As shown, in order to suppress the generation and impact intensity of horizontal current in the aluminum liquid layer in the aluminum electrolysis cell, and to increase the incremental intensity of the cathode current in the aluminum liquid layer that is vertically conducted through the cathode carbon block to the circular cathode steel rod, so that the cathode output current can be shifted towards the middle of the electrolysis cell, the circular cathode steel rod (1) is divided into two sections for conductive structure design when designing and constructing the cathode conductive output device. That is, the conductive input end (1-2) of the circular cathode steel rod (1) is made of a full copper circular copper rod (13) and the conductive output end of the cathode steel rod is made of low carbon steel. (1-1) The overall structural configuration is constructed, and the two can be connected by welding or by inserting thread (14). After the circular cathode steel rod 1 is assembled into the cathode carbon block, the conductivity of the all-copper circular copper rod (13) is better than that of the aluminum liquid layer (8) and the linear expansion coefficient of copper material is greater than that of the cathode carbon block (2). This reduces the contact voltage drop between the iron-carbon interface of the cathode carbon block and the cathode steel rod, thereby forming a cathode current output channel with a relatively low resistance value on the cathode conductive output device.
[0041] Example 6: As Figure 12 , Figure 13As shown, in order to suppress the generation and impact intensity of horizontal current in the aluminum liquid layer in the aluminum electrolysis cell, increase the incremental intensity of the cathode current in the aluminum liquid layer that is vertically conducted to the circular cathode steel rod through the cathode carbon block, so that the cathode output current can be shifted to the middle of the electrolysis cell, when designing and constructing the cathode conductive output device, the circular cathode steel rod (1) is divided into two sections for conductive structure design. That is, the conductive input end (1-2) of the circular cathode steel rod (1) is constructed as an integral structure with the threaded connecting rod (15) and the conductive output end (1-1) of the smooth rod circular cathode steel rod. After the circular cathode steel rod 1 is assembled into the cathode carbon block, the iron-carbon interface between the external thread of the threaded rod and the internal thread of the cathode carbon block can be used to reduce the contact voltage drop between the iron-carbon interface of the cathode carbon block and the cathode steel rod by taking advantage of the fact that the iron-carbon interface between the external thread of the threaded rod and the internal thread of the cathode carbon block is larger than that between the circular smooth rod and the cathode carbon block. Thus, a cathode current output channel with a relatively low resistance value is formed on the cathode conductive output device.
Claims
1. A circular cathode steel rod with adjustable horizontal current in an aluminum electrolysis cell, characterized in that: A circular cathode steel rod (1) with a continuous structure is divided into two sections, left and right, for conductive structure design. That is, different conductive metal materials or conductive structure designs are used at the cathode current input end (1-2) and the cathode current output end (1-1) so that the circular cathode steel rod can form different potential differences after being combined with the cathode carbon block. After being applied to the production of the electrolytic cell, the cathode current to be output in the aluminum liquid layer of the aluminum electrolytic cell can be concentrated and output to the low resistance cathode current input end area through the cathode carbon block. This achieves the purpose of evenly distributing the cathode current output density in the aluminum liquid layer, suppressing the horizontal current to the side direction, reducing the impact and wear intensity and negative effects of the aluminum liquid magnetic vortex on the side furnace wall and the local cathode carbon block.
2. The circular cathode steel rod for adjusting the horizontal current of an aluminum electrolysis cell according to claim 1, characterized in that: When designing and constructing two different conductive functional areas on the left and right sides of a circular cathode steel rod, the resistance value of the conductive input terminal (1-2) of the cathode steel rod should be less than the resistance value of the conductive output terminal (1-1) of the cathode steel rod.
3. The circular cathode steel rod for adjusting the horizontal current of an aluminum electrolysis cell according to claim 1, characterized in that: Its circular cathode steel rod (1) is made of low carbon steel. Its cathode current conductive output end (1-1) section is configured with a large diameter, and its cathode current conductive input end (1-2) section is configured with a small diameter. A conductive copper sleeve (10) is configured outside the cathode steel rod electrical input end (1-2) section.
4. The circular cathode steel rod for adjusting the horizontal current of an aluminum electrolysis cell according to claim 1, characterized in that: The circular cathode steel rod (1) is divided into two sections for conductive structure design. Several conductive copper tiles (11) are set on the outside of the conductive input end of the circular cathode steel rod. The conductive copper tiles (11) are either continuous or segmented at the conductive input end (1-2) of the circular cathode steel rod.
5. A circular cathode steel rod for adjusting the horizontal current of an aluminum electrolysis cell according to claim 1, characterized in that: An arc-shaped conductive copper pad (12) is provided on the upper part of the conductive input end (1-2) of the circular cathode steel rod (1).
6. A circular cathode steel rod for adjusting the horizontal current of an aluminum electrolysis cell according to claim 1, characterized in that: The circular cathode steel rod (1) is divided into two sections for conductive structure design. The conductive input end (1-2) of the circular cathode steel rod (1) is made of all-copper circular conductive copper rod (13) and the conductive output end (1-1) of the cathode steel rod is made of low carbon steel. The two are connected by welding or by through thread (14).
7. A circular cathode steel rod for adjusting the horizontal current of an aluminum electrolysis cell according to claim 1, characterized in that: it is circular. The cathode steel rod (1) is divided into two sections for conductive structure design. The conductive input end (1-2) of the circular cathode steel rod (1) is connected to the conductive output end (1-1) of the smooth circular cathode steel rod by means of a threaded connecting rod (15) to form an integral structure.
8. A circular cathode steel rod for adjusting the horizontal current of an aluminum electrolysis cell according to claim 1, characterized in that: it is circular. The cathode steel rod (1) is divided into two sections for conductive structure design. A copper conductive transition layer is sprayed or plated onto the outer surface of the low carbon steel material at the conductive input end (1-2) of the circular cathode steel rod (1).