Anti-magnetic shielding apparatus for repairing welding of electrolytic tank horizontal bus in strong magnetic field environment

Abstract

The invention relates to the repairing of the electrolytic tank aluminum bus, especially to an anti-magnetic shielding apparatus for repairing welding of an electrolytic tank horizontal bus in a strong magnetic field environment. The anti-magnetic shielding apparatus is characterized in that the apparatus comprises complete and continuous shielding anti-magnetic covers that are made of materials with high magnetic permeability and cooperate well at a welding part and a welding machine; and guiding plates that can be dismounted are arranged at the rear ends of the shielding anti-magnetic covers in a cooperation mode. According to the invention, the structure is unique; the magnetic force lines can be shielded and guided; the magnetic field can be reduced even eliminated inside the shielding space; and thus objectives of successful welding and welding quality guarantee can be achieved.

Description

technical field [0001] The invention relates to the repair of the aluminum bus bar of the electrolytic cell, in particular to an antimagnetic shielding device for repairing and welding the horizontal bus bar of the electrolytic cell in a strong magnetic field environment. Background technique [0002] In recent years, the national electrolytic aluminum industry has developed rapidly, and the current intensity of the aluminum electrolytic cell has also increased from the previous 120kA to the current 400kA and 500kA. Due to the large power consumption of the new electrolytic cell and the complicated layout of the aluminum busbar, the entire electrolytic workshop generates a strong electromagnetic field . For example, the highest magnetic field strength value tested in the actual operation of the 400KA electrolyzer has reached 850GS. [0003] During the production process of electrolytic aluminum, mechanical wear and frictional discharge ignition occur on the contact surface ...

AI Technical Summary

Problems solved by technology

The series of electrolyzer power outages will cause major economic losses

In the past, the repair and welding work of the horizontal busbar of the 120KA and 200KA electrolytic cells was to lift the upper structure of the electrolytic cell back to the overhaul workshop for repair and welding of the horizontal busbar and other maintenance work. The purpose was to avoid the influence of the magnetic field in the electrolytic workshop on the maintenance work. , The 400KA electrolytic cell has a large tank shape, and the transfer of the upper structure where the busbar is located requires large-scale transport vehicles and cranes, and a large-scale repair workshop needs to be built for this, which will inevitably result in large transportation costs, labor costs, and workshop construction costs. It also makes busbar welding and repair cycle extension

[0005] There is no device that overcomes the above-mentioned defects so far

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