Method for preventing aluminium leakage from side parts and bottom part of aluminium electrolysis bath

Abstract

The invention relates to a method for preventing aluminium leakage from the side parts and the bottom part of an aluminium electrolysis bath. The method comprises the following steps: firstly teeth are respectively processed at four edges of the top part of each cathode carbon block, then the cathode carbon blocks are arranged on the electrolysis bath to implement tamping of carbon paste in seams between the slopes of the edge parts and the cathode carbon blocks; when the carbon paste surfaces are tamped to the bottom surfaces of the teeth at the peripheries of the cathode carbon blocks and are on the same plane with the bottom edges of the teeth, the teeth at the peripheries of the cathode carbon blocks close to the bath ledges are provided with a ring of refractory bricks or bath-shaped refractory bricks; and a refractory brick or a bath-shaped refractory brick is arranged on the teeth of the middle seam of every two adjacent cathode carbon blocks; and a carbon tamping paste slope is rammed between the side surfaces of the carbon blocks at the edge parts for placing the refractory brick or the bath-shaped refractory brick and the carbon blocks at the edge parts thereof, and a layer of refractory-material board is bonded on a position close to the upper surface of the slope after the slope tamping is finished. The method can avoid the aluminium leakage in cracks caused by tamping paste on artificial extending legs, bewteen the artificial extending legs and the cathode carbon blocks and between two adjacent cathode carbon blocks.

Description

technical field [0001] The invention belongs to the technical field of electrolytic aluminum, and in particular relates to a method for preventing aluminum leakage from an aluminum electrolytic cell. Background technique [0002] At present, all industrial pure aluminum is produced by molten salt electrolysis. The main equipment for the application of molten salt electrolysis is an electrolytic cell. There are refractory materials and insulation materials between the steel tank shell and the bottom of the electrolytic cell is a carbon block with conductive steel rods installed at the bottom. This carbon block is called a cathode carbon block. The side of the electrolytic cell is generally made of carbon material Made of blocks, some of which are also made of silicon carbide bricks combined with silicon nitride. The side carbon block and the bottom carbon block are usually connected by a slope made of carbon paste, which is generally called artificial leg extension. [0003]...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems of the existing aluminum electrolytic cells during the firing process, the artificial outriggers, the tamping paste between the artificial outriggers and the cathode carbon block, and the problems that large cracks are easily generated between two adjacent cathode carbon blocks, resulting in aluminum leakage, the present invention Provides a method for preventing aluminum leakage from the side and bottom of an aluminum electrolytic cell, so as to avoid leakage from the cracks produced by artificial extension legs, between artificial extension legs and cathode carbon blocks, and between two adjacent cathode carbon blocks. purpose of aluminum

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