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Aluminum electrolysis cell riser bus bar electrified repairing method

A technology of column busbar and aluminum electrolytic cell, which is applied in the field of aluminum smelting, can solve the problems of poor wetting effect, difficult fusion, poor side wall fusion effect, etc., and achieves the effect of simple and rapid operation, safe and reliable process

Active Publication Date: 2013-09-11
GUIZHOU BRANCH CHINA ALUMINUM IND +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has three disadvantages: (1) Due to the limitation of heating conditions, the temperature of the molten aluminum is only 900-1180°C, which is only 250-400°C higher than the melting point of aluminum. Better fusion; (2) The caulking of the aluminum liquid only depends on the flow of gravity, and its caulking effect is poor; (3) No wetting elements are added to the aluminum liquid, and the wetting effect of the base metal is poor
Therefore, the welds obtained by casting welding in this way generally have the problem of poor fusion effect of the side wall
If applied to actual production, not only the welding joint consumes more power, but also lays a hidden danger for long-term safe and normal operation

Method used

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  • Aluminum electrolysis cell riser bus bar electrified repairing method

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Experimental program
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Effect test

Embodiment 1

[0023] Due to the breakdown of the insulation board at the short-circuit opening of the 200KA aluminum electrolytic cell, the surface of the column bus and the short-circuit bus are blasted. The dimensions of the damaged surface of the column bus are: length 420mm, width 150mm, depth 80mm.

[0024] The live repair method of the column busbar of the aluminum electrolytic cell, the repair steps are as follows:

[0025] 1. Damage surface treatment:

[0026] Use insulating paper to wrap the short-circuit busbar on the opposite side, and lay insulating boards on the grid ground near the column busbar on the side of the electrolytic cell, mainly for the purpose of insulation and ensuring the safety of personnel. The operator stands on the insulation board, burns off the rubber rod in the connection hole between the column busbar and the short-circuit busbar with an oxyacetylene flame, saws off the large solidified aluminum block on the surface of the column busbar with a sawing mach...

Embodiment 2

[0059] The column busbar of 120KA aluminum electrolytic cell is washed out due to the leak. The size of the damaged surface of the column busbar is: length 300mm, width 200mm, depth 120mm.

[0060] The live repair method of the column busbar of the aluminum electrolytic cell, the repair steps are as follows:

[0061] 1. Damage surface treatment:

[0062] Use insulating paper to wrap the short-circuit busbar on the opposite side, and lay insulating boards on the grid ground near the column busbar on the side of the electrolytic cell, mainly for the purpose of insulation and ensuring the safety of personnel. The operator stands on the insulation board, burns off the rubber rod in the connection hole between the column busbar and the short-circuit busbar with an oxyacetylene flame, saws off the large solidified aluminum block on the surface of the column busbar with a sawing machine, and removes the column with a pneumatic grinder Use a straight grinder and a high-speed electric...

Embodiment 3

[0088] 200KA aluminum electrolytic cell due to the arc discharge at the short-circuit opening, the surface of the column bus and the short-circuit bus are blasted, and the size of the damaged surface of the column bus is: length 250mm, width 180mm, depth 100mm.

[0089] The live repair method of the column busbar of the aluminum electrolytic cell, the repair steps are as follows:

[0090] 1. Damage surface treatment:

[0091] Use insulating paper to wrap the short-circuit busbar on the opposite side, and lay insulating boards on the grid ground near the column busbar on the side of the electrolytic cell, mainly for the purpose of insulation and ensuring the safety of personnel. The operator stands on the insulation board, burns off the rubber rod in the connection hole between the column busbar and the short-circuit busbar with an oxyacetylene flame, saws off the large solidified aluminum block on the surface of the column busbar with a sawing machine, and removes the column w...

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Abstract

The invention discloses an aluminum electrolysis cell riser bus bar electrified repairing method which comprises the following steps of: treating a damaged surface, mounting a graphite bar, calculating the addition amount of a flux for aluminum electrolysis cell riser bus bar electrified repairing, mounting a mould, welding, opening the mould and treating the metal surface of a weld seam. According to the aluminum electrolysis cell riser bus bar electrified repairing method disclosed by the invention, a riser bus bar and an insulation intersection can be repaired in an electrified manner without experiencing interference of the high-intensity magnetic field of an electrolytic plant; the fusion rate of the side wall of the weld joint of the riser bus bar is high, and the performance of the welded joint is similar to that of a parent material; and moreover, the method has safe and reliable technology, is simple and quick to operate and is suitable for popularization and application to the aluminum electrolysis industry.

Description

technical field [0001] The invention belongs to the technical field of aluminum smelting, and relates to a repair method for a column bus bar of an aluminum electrolytic cell, in particular to a live repair method for a column bus bar of an aluminum electrolytic cell in a strong magnetic field environment. Background technique [0002] In recent years, the national aluminum industry has developed rapidly. In order to increase the output of aluminum, the current intensity of the aluminum electrolytic cell has also increased from the previous 100kA to the current 300kA and 400kA. The current of the first phase of the 388,000-ton electrolytic aluminum project even reached a record-breaking 500kA. At present, 600kA electrolyzer is also under development. The electrolytic cell consumes a lot of electricity, the wire layout is relatively complicated, and the entire electrolytic workshop generates a strong electromagnetic field. Depending on the current intensity, the maximum mag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C3/16B22D19/10
Inventor 史生文张国栋张明谦张富巨张整社张峰春郭爱军韩宁
Owner GUIZHOU BRANCH CHINA ALUMINUM IND
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