Dry type aluminum electrolysis cell

Abstract

The invention discloses a dry type aluminum electrolysis cell, and belongs to the technical field of aluminum electrolysis cells. In the dry type aluminum electrolysis cell, an aluminum hiding blind ditch is formed between cathode carbon blocks, positioned at a slot of the cathode carbon blocks and can be formed at any position below an anode; a plurality of grooves are formed on the cathode carbon blocks of the electrolysis cell; grooves are also formed on the big surfaces and the end parts of the electrolysis grooves; the depths of the grooves on the cathode carbon blocks and the grooves onthe electrolysis cell are all less than or equal to that of the aluminum hiding blind ditch between the cathode carbon blocks; and the grooves on the cathode carbon blocks and the grooves on the electrolysis cell are communicated with the aluminum hiding blind ditch. Through the dry type aluminum electrolysis cell, aluminum liquid is not produced between poles, so that the influence of an electromagnetic field on stability of the electrolysis cell is greatly reduced, and polar distance is also reduced, namely the current efficiency is improved and the cell voltage is reduced to achieve the effect of energy conservation and consumption reduction. Because the influence of the magnetic field on the stability of the electrolysis cell is greatly reduced, the bus design of the electrolysis cellcan be greatly simplified and the amount of a used bus material is saved.

Description

technical field [0001] The invention relates to a dry aluminum electrolytic cell, which belongs to the technical field of aluminum electrolytic cells. Background technique [0002] Since the Hall-Heroult molten salt electrolysis technology was born in 1886, the electrolysis cell, the key equipment for the production of primary aluminum, mainly uses carbon anodes and carbon blocks as cathodes. The most widely used aluminum electrolytic cell technology is that the electrolytically separated aluminum in the electrolytic cell accumulates on the upper part of the carbon block cathode at the bottom of the cell to form a liquid aluminum layer and is used as a part of the cathode; another electrolytic cell technology is that the cathode carbon There is no aluminum liquid layer on the upper surface of the block, and the cathode carbon block directly participates in electrolysis as the cathode, and the aluminum liquid generated by electrolysis directly flows into the groove in the tan...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a dry-type aluminum electrolytic cell, the purpose of which is to realize stable production under the condition of low pole distance, reduce the voltage drop between electrodes, and improve the utilization rate of electric energy of the aluminum electrolytic cell; The aluminum storage capacity of the aluminum pool is small, which cannot meet the requirements of normal aluminum production. The aluminum is hidden in the dark ditch, and the utilization rate of the cathode conductive area is also greatly improved.

Images