Aluminum electrolytic tank with novel cathode structure capable of reducing protruding abrasion of cathode

Abstract

The invention provides an aluminum electrolytic tank with a cathode structure capable of reducing protruding abrasion of a cathode. In the aluminum electrolytic tank, an edge part, along the length direction, on the upper edge of each cathode carbon block is processed with a protruding structure named lengthwise protrusion; or the upper part of each cathode carbon block is processed with the protrusion which is vertical to the length direction of the cathode carbon block and named widthwise protrusion; or the upper edge part of each cathode carbon block is simultaneously processed with the lengthwise protrusion and the widthwise protrusion. The middle part of each protrusion of each cathode carbon block is embedded with a layer of fireproof material wall plate, the protrusion of the cathode carbon block and the fireproof material wall plate form the whole protrusion with the functions of reducing flow rate of aluminum liquid, reducing fluctuation of the aluminum liquid and improving stability of the aluminum liquid surface of the electrolytic tank, and after the protrusions of the cathode carbon block are abraded, because the fireproof material wall plates have smaller electrochemical abradability than carbon, the fireproof material wall plates can continuously have the action of reducing the flow rate of the aluminum liquid.

Description

technical field [0001] The invention belongs to the technical field of electrolytic aluminum, and in particular relates to an aluminum electrolytic cell capable of slowing down the erosion of cathode projections. Background technique [0002] At present, the metal aluminum produced in the industry is produced by molten salt electrolysis. The special equipment is an electrolytic cell lined with carbonaceous materials (or silicon nitride combined with silicon carbide bricks), and the carbonaceous lining and steel tank shell Between them are refractory materials and insulation materials. The bottom lining of the electrolytic cell is a carbon block with conductive steel rods installed at the bottom, which is called the cathode carbon block of the electrolytic cell. The cathode carbon block is connected with the cathode carbon block by tamping with carbon paste, and many cathode carbon blocks and the tamping paste between them form the bottom carbon cathode of the electrolytic c...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problems existing in the above-mentioned prior art, the present invention provides an aluminum electrolytic cell capable of slowing down the erosion of the cathode, so as to solve the problem of the low service life of the projections on the cathode surface due to physical and chemical abrasion.

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