Bottom-discharging aluminum cell

An aluminum electrolytic cell and electrolytic cell technology, applied in the field of aluminum electrolytic cells, can solve the problems of large vertical magnetic field, uneven current distribution, and violent fluctuation of molten aluminum, so as to reduce the vertical magnetic field, improve the distribution uniformity, and slow down the vertical fluctuation amplitude. Effect

Inactive Publication Date: 2010-06-30
CENT SOUTH UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide an aluminum electrolytic cell with electricity at the bottom of the cell, aiming at defects such as uneven distribution of aluminum liquid and cathode current, large vertical magnetic field, and violent fluctuation of the aluminum liquid on the horizontal surface of the cathode in the current aluminum electrolysis. The unique cathode structure and bus bar configuration make the aluminum liquid and cathode current in the aluminum electrolytic cell evenly distributed, the horizontal current and vertical magnetic field are small, and the stability of the aluminum liquid on the cathode surface is good

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Embodiment 1

[0026] Such as figure 1 As shown, the novel cathode structure aluminum electrolytic cell of the present invention consists of steel tank shell 1, asbestos board 2, side lining 3, tamping paste 4, cathode carbon block 5, horizontal cathode steel rod 6a, vertical cathode steel rod 6b , refractory material and insulation material 7 and castable 8 components. Wherein, a horizontal long cathode steel rod is equipped with two vertical cathode steel rods (such as figure 2 shown), the location of the connection between the vertical cathode steel rod and the horizontal cathode steel rod is determined by physical field calculations. In this example, the best connection point is 1 / 4 to 3 / 4 of the horizontal steel rod. Due to the relatively uniform conductive distance from the cathode surface to the cathode steel rod, the structure can reduce the generation of horizontal current in the electrolytic cell, thereby reducing the interference of the vertical magnetic field to the aluminum li...

Embodiment 2

[0028] Such as figure 1 As shown, the novel cathode structure aluminum electrolytic cell of the present invention consists of steel tank shell 1, asbestos board 2, side lining 3, tamping paste 4, cathode carbon block 5, horizontal cathode steel rod 6a, vertical cathode steel rod 6b , refractory material and insulation material 7 and castable 8 components. Wherein, a horizontal long cathode steel rod is configured with four vertical cathode steel rods (such as image 3 shown), the selection of the connection position between the vertical cathode steel rod and the horizontal cathode steel rod is determined by the calculation of the physical field. In this example, the best connection points are 1 / 5~2 / 5 and 3 / 5~4 of the horizontal steel rod / 5 places. Because the conductive distance from the cathode surface to the cathode steel rod is more uniform in this structure, the generation of horizontal current in the electrolytic cell can be reduced. The scheme is applied to a 400kA a...

Embodiment 3

[0030] Such as Figure 4 As shown, the novel cathode structure aluminum electrolytic cell of the present invention is made of steel tank shell 1, asbestos board 2, side lining 3, tamping paste 4, cathode carbon block 5, plate-type horizontal cathode 14, vertical cathode steel rod 6b, The refractory material, the heat insulating material 7 and the casting material 8 are composed. Wherein, the bottom of the cathode steel bar is equipped with a horizontal cathode steel plate, and each horizontal cathode steel block can be equipped with two or four vertical cathode steel bars (such as figure 2 , image 3 shown), the connection position selection of the vertical cathode steel rod and the horizontal cathode steel rod can be determined by calculation to determine the best connection point. This structure conducts electricity at equidistant distances from the surface of the cathode to the cathode steel bar block, so its horizontal current will be smaller than that of Embodiment 1 a...

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Abstract

The invention discloses a bottom-discharging aluminum cell which is provided with a plurality of cathodes. Each cathode comprises a horizontal cathode steel rod and a vertical cathode steel rod or each cathode comprises a horizontal cathode steel rod and one or more vertical cathode steel rod; the horizontal cathode steel rod or a flat cathode steel block and the vertical cathode steel rod form a T-shaped or phi-shape structure. The bottom of the vertical cathode steel rod is connected with a cathode bus of the aluminum cell; the cathode bus of the aluminum cell is partially gathered on the bottom of the aluminum cell and is partially gathered on the end of the aluminum cell. The bottom-discharging aluminum cell uses the specific cathode structure and bus, so the aluminum liquid and the cathode current of the aluminum cell are uniformly distributed, the level current and the vertical magnetic field are small and the stability of the surface aluminum liquid is excellent.

Description

technical field [0001] The invention belongs to the field of aluminum electrolytic cells, in particular to an aluminum electrolytic cell with discharge electricity from the bottom of the cell. Background technique [0002] The traditional Hall-Héroult aluminum electrolysis process has always been the only method for industrial aluminum smelting. However, its high energy consumption is one of the main disadvantages of the Hall-Héroult process. The main reasons leading to high energy consumption are as follows: First, the distances from the points on the surface of the current cathode block to the cathode steel rod are not equal, which makes the distribution of cathode current uneven, and it is difficult for the current at the corners to flow directly from the cathode carbon block to the cathode steel rod, which is easy A horizontal current is generated in the electrolytic cell, causing the aluminum liquid to fluctuate, and the secondary reaction of the aluminum liquid leads t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C3/08
Inventor 李劼张红亮赖延清丁风其吕晓军谢长春田忠良肖劲
Owner CENT SOUTH UNIV
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