Small repairing method for aluminum electrolytic bath cathode inner lining damage
A cathode lining and aluminum electrolytic cell technology, which is applied in the field of aluminum electrolytic cell repair, can solve problems such as increased cost per ton of aluminum, economic loss, and non-repair, and achieve the effects of prolonging service life, reducing environmental pollution, and saving overhaul costs
Inactive Publication Date: 2009-08-19
GUIZHOU BRANCH CHINA ALUMINUM IND
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AI Technical Summary
Problems solved by technology
[0002] At present, there are no remedial measures for the early damage or leakage of the electrolyzer, but an unplanned overhaul in advance. This method has the following disadvantages and shortcomings: (1) significantly shorten the average tank age; (2) increase per ton of aluminum cost; (3) bring greater economic losses to the enterprise
At present, although some aluminum electrolysis enterprises also carry out minor repairs for the early damage of electrolytic cells in China, they do not have relatively standardized formulas and reliable technologies, and the effect after repairs is not obvious enough. According to the available data, it is usually insufficient to continue production after minor repairs One year; damaged tanks with a tank age of 700 days to 1200 days are usually not repaired
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment 1
[0009] The minor repair method for the damage of the cathode liner of the aluminum electrolytic cell of the present invention is divided into three repair steps:
[0010] The first step: minor repair materials preparation steps:
[0011] The minor repair materials for the damaged lining of the electrolytic cell are anhydrous magnesium chloride, magnesium oxide and magnesia. 3 The solution, then according to the volume percentage of anhydrous magnesium chloride, magnesium oxide and magnesia is 1: 2: 3 modulation into magnesia concrete;
[0012] The second step: electrolytic cell minor repair planing furnace steps:
[0013] a. Cleaning of cathode surface:
[0014] (1) First clean the alumina and electrolyte in the tank, and then remove the precipitation on the surface of the cathode with an air pick, so that the surface of the cathode carbon block and the solid paste are completely exposed;
[0015] (2) When cleaning the surface of the cathode, it should be operated carefully...
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Abstract
The present invention relates to aluminium cell repair technology, especially relating to minor repair of aluminium cell cathode lining breakage. Said invented method includes electrolytic bath minor repair material preparation, electrolytic bath minor repair furnace planing, electrolytic bath cathode lining minor repair. Said invention effectively prolongs electrolytic bath service life, reducing aluminum cost, saving overhaul cost and environmental pollution.
Description
technical field [0001] The invention relates to a repair technology for an aluminum electrolytic cell, in particular to a method for minor repair of the cathode inner lining of an aluminum electrolytic cell which can perform minor repairs to the damage of the cathode lining of an early damaged cell and a young cell. Background technique [0002] At present, there are no remedial measures for the early damage or leakage of the electrolyzer, but an unplanned overhaul in advance. This method has the following disadvantages and shortcomings: (1) significantly shorten the average tank age; (2) increase Ton aluminum cost; (3) bring bigger economic loss to the enterprise. At present, although some aluminum electrolysis enterprises also carry out minor repairs for the early damage of electrolytic cells in China, they do not have relatively standardized formulas and reliable technologies, and the effect after repairs is not obvious enough. According to the available data, it is usual...
Claims
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IPC IPC(8): C25C3/08
Inventor 王平王煊赵成宝成善付明录王广稳车永林郭刚李秉玉蔡有萍张云花张学峰杨彩云万五世
Owner GUIZHOU BRANCH CHINA ALUMINUM IND