Innerlining damage small repair material recipe for aluminum electrolytic bath

A cathode lining and aluminum electrolytic cell technology, which is applied in the field of refractory materials, can solve the problems that cannot completely solve the problem of electrolytic cell damage or leakage, shorten the average cell age of the series, increase the cost of aluminum per ton, and achieve early damage or leakage. Phenomena, scientific and reasonable material formula, and the effect of saving overhaul costs

Inactive Publication Date: 2007-01-24
GUIZHOU BRANCH CHINA ALUMINUM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the existing technology, during the operation of the electrolytic cell, magnesia hot repair is used when the cathode has erosion pits, but this method cannot completely solve the early damage or leakage of the electrolytic cell; No remedial measures were taken, and all unplanned outages were carried out for overhaul
This method has the disadvantages and deficiencies in the following aspects: (1) significantly shorten the average tank age of the series; (2) increase the cost of aluminum per ton; (3) bring greater economic losses to the enterprise
At present, some domestic enterprises also carry out minor repairs on early damaged electrolyzers, but there is no effective formula and reliable technology, and the effect after repairs is not obvious. According to existing data, it usually takes less than one year to continue production after minor repairs. For tanks with an age of 700 Days - 1200 days Slots are usually not repaired

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Anhydrous magnesium chloride (MgCl 2 ), light magnesia (MgO) and magnesia, its proportioning is: magnesium chloride: magnesia: magnesia=1:2:3. The configuration of the magnesia concrete is that the brine block, that is, anhydrous magnesium chloride is added with water to adjust the density to 1.38-1.42g / cm 3 Solution; light magnesia and magnesia dry material are stirred evenly, and the magnesia concrete is prepared according to the above-mentioned volume percentage of 1:2:3. The formula of this material is used for the repair of the main leak. After the repair material is configured, it should be baked with a kerosene heater 2 hours after construction.

Embodiment 2

[0017] Take the brine block, that is, anhydrous magnesium chloride and light magnesium oxide, the proportioning ratio of which is: magnesium chloride: magnesium oxide = 2:1. The configuration of the mixed solution slurry is that the brine block, that is, anhydrous magnesium chloride, is adjusted to a density of 1.38g / cm by adding water. 3 solution; light magnesium oxide is added for stirring, and the mixed solution slurry is prepared according to the above-mentioned volume percentage of 2:1. This material formula is used for: the empty seam and the paste condensation shrinkage joint with the width of the groove within 2mm.

Embodiment 3

[0019] Get magnesium chloride and magnesium oxide, and its proportioning is: magnesium chloride: magnesium oxide=1:1. The configuration of the thick slurry of the mixed solution is that the brine block, that is, anhydrous magnesium chloride, is adjusted to a density of 1.42g / cm by adding water. 3 solution; light magnesium oxide is added for stirring, and the mixed solution slurry is prepared according to the above-mentioned volume percentage of 1:1. The formula of this material is used for: empty seams and paste condensation shrinkage joints with a width of less than 3-5mm in the groove.

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Abstract

The present invention relates to refractory material, and is especially recipe of material for minor repairing the damaged cathode lining of aluminum electrolytic bath. The recipe of the repair material consists of anhydrous magnesium chloride, light magnesium oxide and magnesia in the weight ratio of 1 to 2 to 3. All the anhydrous magnesium chloride, light magnesium oxide and magnesia are mixed to form the magnesia concrete.

Description

technical field [0001] The invention relates to a refractory material used for minor repairs of electrolytic cells in the aluminum electrolytic industry, in particular to a formula of materials for minor repairs of damaged inner linings of aluminum electrolytic cells. Background technique [0002] In the existing technology, during the operation of the electrolytic cell, magnesia hot repair is used when the cathode has erosion pits, but this method cannot completely solve the early damage or leakage of the electrolytic cell; No remedial measures were taken, and all unplanned overhauls were carried out. This method has the disadvantages and disadvantages in the following aspects: (1) significantly shorten the average tank age of the series; (2) increase the cost of aluminum per ton; (3) bring large economic losses to the enterprise. At present, some domestic enterprises also carry out minor repairs on early damaged electrolyzers, but there is no effe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/32
CPCC04B2111/28C04B28/32
Inventor 王平付明录车永林赵成李秉玉杨彩云张云花张学峰万五世
Owner GUIZHOU BRANCH CHINA ALUMINUM IND
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