Cathode steel bar structure for reducing horizontal current of molten aluminum in aluminum electrolysis cell

Abstract

The invention discloses a cathode steel bar structure for reducing horizontal current of molten aluminum in aluminum electrolysis cell. The cathode steel bar structure comprises a cathode steel bar embedded into the bottom of a cathode carbon block, one end of the cathode steel bar is close to the center of the aluminum electrolysis cell, the other end of the cathode steel bar extends to exceed the side face of the corresponding side of the cathode carbon block, two L-shaped slits are cut in the cathode steel bar to divide the cathode steel bar into three parts, the upper ends of the verticalsections of the two L-shaped slits are located at the top of the cathode steel bar, the end of the horizontal section of the first L-shaped slit and the end of the horizontal section of the second L-shaped slit extend to the ends, exceeding the side face of the cathode carbon block, of the cathode steel bar correspondingly, and each L-shaped slit is filled with an insulating material. According tothe cathode steel bar structure, the horizontal current density of the molten aluminum layer is greatly reduced; only the cathode steel bar structure is adjusted, and other structures of a traditional cathode are reserved.

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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