A prebaked anode off-line connection process for aluminum electrolytic cell

Abstract

The invention discloses a prebaked anode off-line continuing technology of an aluminum electrolysis cell. A special calcination material and old anode waste heat are used by a new anode and an old anode which are calcinated and cured into one in a calcination and smoke evacuation insulation box outside the electrolysis cell, structural design of the original electrolysis cell is not changed, maintechnology operation of the original electrolysis cell is not affected, the structure is concise, operation is simple and convenient, and the transformation cost of the original electrolysis cell is not added. The technology comprises the steps that a new anode carbon block is prepared, the new anode carbon block is covered by a calcination and curing material, an old anode carbon block is hoistedout from the electrolysis cell, and is placed on the new anode carbon block, the old anode waste heat is used by the new anode and the old anode which are calcinated and cured into one, and then an anode composed of the new anode and the old anode is hoisted into the cell, and is used as an anode assembly for participating in electrolysis and the like.

Description

technical field [0001] The invention belongs to the technical field of aluminum electrolysis, and in particular relates to an off-line connection process of a prebaked anode of an aluminum electrolytic cell. Background technique [0002] In the modern aluminum electrolysis production process, the anode carbon block suspended on the upper part of the tank and the cathode fixed on the bottom of the tank are used to conduct high-current direct current, and the main component in the tank is alumina (Al 2 o 3 ) electrolyte for electrolysis, the oxygen atoms react with the anode carbon block to generate CO 2 And CO gas is discharged, pure aluminum melt is generated at the bottom of the tank, and the smelting of metal aluminum is completed. Prebaked anode is the main raw material used in aluminum electrolysis, and it is also an important part of the electrolytic cell. It is composed of multiple groups of anode carbon blocks, anode conductive metal rods or rods, lifting devices an...

AI Technical Summary

Problems solved by technology

In the production process, the present invention only needs to replace a small amount of residual anodes, and use a large number of new anodes continuously, and does not need to modify any structure of the existing electrolytic cell and auxiliary multifunctional machinery in the electrolytic workshop, and does not need to greatly change the existing production operation habits and the shape of the anode carbon block Small changes are easy to manufacture, and there is no need to operate in the harsh environment of the electrolytic cell, so that the anode carbon block is consumed as much as possible during the aluminum electrolysis production process, and the generation of residual electrodes is greatly reduced, which solves the problem of a large number of residual electrodes generated by the existing aluminum electrolysis process and the occurrence of residual electrodes. Severe environmental pollution caused by fluorine-containing electrolytes, heavy work in the anode assembly workshop, and a large amount of funds occupied by the turnover guide rod group

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