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

Abstract

The invention discloses a cathode steel bar structure capable of reducing horizontal current of molten aluminum for an aluminum electrolysis cell. The cathode steel bar structure comprises a first cathode steel bar (strip-shaped), a second cathode steel bar, a third cathode steel bar (U-shaped) and separation layers for separating the three cathode steel bars. The cathode steel bar structure is integrally embedded into the bottom of a cathode carbon block, one end of the cathode steel bar structure is embedded into the position, close to the middle section of the cathode carbon block, of the cathode carbon block, and the other end of the cathode steel bar structure is provided with an electricity outlet end which extends and exceeds the corresponding side face of the cathode carbon block. According to the cathode steel bar structure, a separation layer is arranged between two adjacent cathode steel bars, the three cathode steel bars are separated by the separation layers, and the top surfaces of the three cathode steel bars are arranged in a step shape. According to the cathode steel bar structure, the horizontal current density in a molten aluminum layer of the aluminum electrolysis cell is greatly reduced, only the structural configuration of the cathode steel bars and the cathode carbon block is adjusted, the structure is simple, and industrial implementation is easy.

Description

technical field [0001] The invention relates to the field of aluminum electrolytic cells, in particular to a cathode steel rod structure for an aluminum electrolytic cell that can reduce the horizontal current of aluminum liquid. Background technique [0002] The aluminum electrolysis industry is a supporting industry for the national economy and has important strategic significance. In 2020, my country's annual aluminum output will reach 50 million tons, with an average growth rate of 12% in the past ten years. The current aluminum electrolysis still uses the cryolite-alumina molten salt electrolysis method (Hall-Elutt method) as the basic principle. The actual electrolysis process takes place in the working environment of high temperature and high current, and the large current is input into the anode steel through the anode busbar. After the claws and carbon block, it flows through the high-resistance electrolyte and liquid metal aluminum layer, and finally outputs throu...

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Problems solved by technology

[0006] The purpose of the present invention is to provide a cathode steel rod structure for an aluminum electrolytic cell that can reduce the horizontal current of the aluminum liquid, so as to solve the problem of high horizontal current density of the aluminum liquid in the aluminum electrolytic cell and easy aggregation of charges at the outlet end of the cathode steel rod in the prior art. question

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