Anode structure for increasing exhaust rate of electrolysis gas from aluminum electrolysis cell

Abstract

The invention relates to an anode structure for increasing the exhaust rate of electrolysis gas from an aluminum electrolysis cell. The anode structure comprises an anode assembly and a guide rod assembly. The anode assembly is fixedly connected with the guide rod assembly. A groove is formed in the bottom of the anode assembly. A through hole is formed in a carbon bowl in the middle of the anode assembly. The guide rod assembly comprises a guide rod, a beam and a plurality of steel jaws. Two steel jaws corresponding to the carbon bowl are each provided with a through hole. Through holes are formed in the beam. According to the anode structure, secondary reactions generated by dissolved metal aluminum particles and CO2 gas are reduced, and the current efficiency is improved; overpotential formed by a gas film is reduced, and power consumption is lowered; the non-conductive time of a new anode is shortened, and fluctuations of the electrolysis cell are reduced; and consumption losses of fluoride salt on a machining face along with gas flying are reduced.

Description

technical field [0001] The invention relates to an anode structure of an aluminum electrolytic cell, in particular to an anode structure for improving the discharge rate of electrolytic gas from an aluminum electrolytic cell. Background technique [0002] In the electrolytic cell, due to the influence of the air permeability of the solid electrolyte covering material on the top of the anode, a slight positive pressure is formed under the covering material, and the CO at the bottom of the anode 2 It is difficult for the gas to be discharged to the upper space of the electrolytic cell. Under the action of the melt flow, CO 2 The probability of gas entering the electrolyte interface is high, resulting in low current efficiency. [0003] Although there is a feeding port on the electrolyte covering material on the processing surface of the electrolytic cell, its area is small compared with the area of ​​the electrolyte covering material, so CO 2 Difficulty expelling gas. [00...

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Problems solved by technology

[0002] In the electrolytic cell, due to the influence of the air permeability of the solid electrolyte covering material on the top of the anode, a slight positive pressure is formed under the covering material, and the CO at the bottom of the anode 2 It is difficult for the gas to be discharged to the upper space of the electrolytic cell. Under the action of the melt flow, CO 2 The probability of gas entering the electrolyte interface is high, resulting in low current efficiency

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