Aluminum electrolytic anode conductive device and preparation method thereof

Abstract

The invention discloses an aluminum electrolytic anode conductive device and a preparation method of the aluminum electrolytic anode conductive device used in aluminum electrolysis. The preparation method of the aluminum electrolytic anode conductive device comprises the following steps of: carrying out whole section welding on an aluminum guide rod and a steel connecting block as a whole, and manufacturing an external thread on a part of outer edge of a welded joint of the aluminum guide rod and the connecting block and on the outer edge of the connecting block; and combining the external thread and an internal thread of a section of steel jacket, causing the lower end of the steel jacket to be flush with the outer end of the connecting block, and then carrying out whole section welding on the outer end of the connecting block, the lower end of the steel jacket and the upper surface of a steel claw transverse beam. The aluminum electrolytic anode conductive device has an electric conduction effect obviously superior to that of the prior art, can fully restrain an aluminum component of an aluminum-steel connecting surface from generating a thermal expansion amount larger than thatof a steel connecting piece during operation, and reduces the shearing force generated at a steel-aluminum bonding part, and therefore, the service life of the aluminum electrolytic anode conductive device is prolonged.

Description

technical field [0001] The invention relates to a preparation method of a conductive anode device used in aluminum electrolysis, and an aluminum electrolysis anode conductive device prepared by the method. Background technique [0002] The anode conductive device currently used in the electrolytic aluminum industry consists of an upper aluminum guide rod and a lower steel anode steel claw. The steel and aluminum cannot be directly welded, and the two are connected by an explosive welding block. Explosive welding nuggets are welded together by using explosive welding technology to weld two different materials, steel and aluminum. When making the anode conductive device, the aluminum part of the explosive welding nugget is welded with the upper aluminum guide rod part of the anode conductive device through argon arc welding, and the explosive Welding block steel connectors are welded to the lower anode steel claw beam flat steel of the anode conductive device through gas shiel...

AI Technical Summary

Problems solved by technology

Therefore, in the electrolysis operation, due to the different expansion coefficients of steel and aluminum, shear force is generated at the steel-aluminum junction of the explosive welding block, resulting in local cracking of the aluminum-steel welding surface, and the cracking of the aluminum-steel welding surface reduces the bearing area and At the same time, it greatly increases the resistance and voltage drop at the aluminum-steel welding surface, which will further increase the temperature rise at the corresponding position

When the cracking failure area reaches the corresponding proportion, the aluminum-steel welding surface may break due to the weight of the carbon block and steel claw, or the aluminum-steel welding surface will be burned due to excessive resistance, resulting in failure. This is the current aluminum electrolysis process. Main causes of failure of conductive devices during operation

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