A cathode steel rod structure for reducing the horizontal current of molten aluminum in an aluminum electrolytic cell

Abstract

The invention discloses a cathode steel rod structure for reducing the horizontal current of aluminum liquid in an aluminum electrolytic cell, which includes a cathode steel rod embedded in the bottom of a cathode carbon block, one end of the cathode steel rod is close to the center of the aluminum electrolytic cell, and the other end of the cathode steel rod extends To exceed the corresponding side of the cathode carbon block, two L-shaped slits are cut out from the cathode steel rod to divide the cathode steel rod into three parts. The upper ends of the vertical sections of the two L-shaped slits are located on the top of the cathode steel rod. The end of the horizontal section of the L-shaped slit and the end of the horizontal section of the second L-shaped slit respectively extend to the end of the cathode steel rod beyond the side of the cathode carbon block, and each L-shaped slit is filled with insulating material. The invention greatly reduces the horizontal current density of the aluminum liquid layer; only adjusts the cathode steel rod structure, and retains other structures of the traditional cathode.

Description

technical field [0001] The invention relates to the field of aluminum electrolysis equipment, in particular to a cathode steel rod structure for reducing the horizontal current of aluminum liquid in an aluminum electrolysis tank. Background technique [0002] Since the last century, with the widespread use of aluminum alloys, the demand for aluminum has expanded, and large-capacity aluminum electrolytic cells have gradually become the main equipment for actual production. The Hall-Herault electrolytic aluminum smelting method is the most important method for industrial aluminum production. The actual electrolysis process takes place in the working environment of high temperature and high current. The electrolyte and liquid metal aluminum layer with too high resistance value are finally output to the cathode busbar through the cathode carbon block and the cathode steel rod. [0003] However, in the overall structure of the aluminum electrolytic cell, the current tends to flo...

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Problems solved by technology

[0005] However, the adjustment of the shape of the cathode steel rod often requires modifying the size parameters of the cathode carbon block and the cathode steel rod at the same time, resulting in a change in the structural stress or electrical conductivity of the cathode steel rod, and the significant improvement of the cathode area has a negative effect on the properties of the material and the stability of the structure. have requirements

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