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Minor maintenance judgment method for electrolyzer

A determination method and electrolytic cell technology, which are applied in the field of electrolytic cell maintenance, can solve problems such as unsatisfactory effects of minor repairs on electrolytic cells, and achieve the effects of shortening the repair cycle, prolonging life, and reducing overhaul costs.

Active Publication Date: 2009-04-01
GUIZHOU BRANCH CHINA ALUMINUM IND
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  • Abstract
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Problems solved by technology

However, some problems were also exposed during the minor repair process, such as: under what circumstances can minor repairs be carried out on early damaged tanks, how to determine that the electrolytic tank is suitable for minor repairs rather than major repairs, etc. The effect is not ideal

Method used

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  • Minor maintenance judgment method for electrolyzer

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Embodiment 1

[0014] Embodiment 1 of the present invention: a. Initial judgment: the age of the electrolytic cell is ≤ 800 days; if the age of the electrolytic cell is > 800 days, minor repairs are not considered in principle.

[0015] Use a ruler to measure the tank shell. The deformation size of the tank shell is ≤100mm in the hot state and ≤80mm in the cold state; the weld seam of the tank shell is not cracked, and the cradle frame is not broken; the tank shell is in good condition and can last for one overhaul period.

[0016] Check the electrolytic cell, and the damaged parts of the electrolytic cell that can be observed are ≤ 3 places. Use a thermometer to detect the abnormal temperature of the cathode steel rod and the temperature of the tank shell steel plate. The floating area of ​​paste and carbon block is ≤30%. For small and medium-sized electrolytic cells, the judgment standard can be lowered. The damaged parts of the electrolytic cell that have been identified are ≤ 2, and the ...

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Abstract

The invention discloses a method for judging the minor repair of an electrolytic tank, which carries out minor repair judgment to the electrolytic tank by initial judgment and secondary judgment. Firstly, the initial judgment is carried out from the age and the shell of the tank and the production situation before the tank breaks, and then the tank is stopped and furnace planing is carried out to the electrolytic tank according to the initial judgment, and feasibility judgment about the minor repair of the tank is carried out from three aspects: the damage situation of a whole tank chamber cathode carbon block, the damage situation of the inner liner at side parts and whether the overall quantity of the whole minor repair is economic. Compared with the prior art, the creativity of the invention lies in that a standard is formed for the minor repair judgment of the electrolytic tank so as to standardize construction and avoid economic loss brought by the uncertainty and irregularity of the minor repair. Then repair is carried out to the electrolytic tank which breaks partially by the minor repair made to the electrolytic tank, thus shortening repair period, reducing heavy repair cost and prolonging the service life of the electrolytic tank.

Description

technical field [0001] The invention relates to a method for judging minor repairs of electrolyzers, belonging to the technical field of electrolyzer repairs. Background technique [0002] Early breakage of aluminum electrolytic cells is a common problem in the aluminum industry. According to the statistics of tank stoppages, there are about 1% early breakage cells in Chinalco Guizhou Branch every year. Before 2002, the shutdown of early damaged tanks was treated as major repairs. After 2002, Chinalco Guizhou Branch tried minor repairs on some early damaged tanks and gained certain experience, such as 2-423# in 2002 and 2003 For the 1-102# groove, the minor repair of the 1-133# groove was successful in 2004, and achieved good economic benefits. However, some problems were also exposed during the minor repair process, such as: under what circumstances can minor repairs be carried out on early damaged tanks, how to determine that the electrolytic tank is suitable for minor re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C3/06
Inventor 尹国勋王忠全程守勇周生权阳志强龙洪军
Owner GUIZHOU BRANCH CHINA ALUMINUM IND
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