Aluminum electrolysis bath

Abstract

The present invention discloses an aluminum cell, especially relates to an aluminum cell with an electric current intensity of and even high than 150 KA. Said aluminum cell comprises a cell housing, an inner lining equipped with a cathode block therein, and an upper structure equipped with an anode block, wherein a flow guidance groove is set between the inner lining cathode block, an aluminum collection groove is set at the middle position at the inner lining upper side, an aluminum-storing groove is provided at the aluminum exit side of the electrolyzer at the end of the inner lining, one end of the aluminum collection groove is connected to the aluminum-storing groove, and a blanking position is set between the anode blocks. The present invention depresses the pole clearance, improves the electric energy use ratio, and realizes aluminum solution free electroanalysis production between poles of aluminum cell at the same time, reducing greatly effects of magnetic fields on the stabilizing ability of aluminum production.

Description

technical field [0001] The invention relates to an aluminum electrolytic cell, in particular to an aluminum electrolytic cell with a current intensity of 150kA or above. Background technique [0002] The Hall-Heroult electrolyser currently used for aluminum industry production uses a carbon anode and a carbon block at surface level as the cathode to produce aluminum by electrolysis of alumina. The electrolyte mainly consists of cryolite and alumina melt with additional fluorine dissolved in it. Aluminum and other fluoride salts. The electrolytically separated aluminum is accumulated on the upper part of the cathode of the carbon block at the bottom of the tank, forming an aluminum liquid layer and serving as a part of the cathode. [0003] Existing Hall-Heroult aluminum electrolytic cells, depending on the size and electrolysis process, have a common problem that the electric energy efficiency is low, generally between 45% and 50%, and the rest of the electric energy is con...

AI Technical Summary

Problems solved by technology

However, the current efficiency of the existing electrolyzers is mostly below 95%, and the space for improving the current efficiency is limited.

At present, the pole distance of the aluminum electrolytic cell is generally about 4.5cm, which provides a lot of space for energy saving and consumption reduction. However, due to the limitation of the structure of the traditional electrolytic cell itself, if the pole distance is reduced, the electrolytic cell will become unstable and lose current efficiency. It is difficult to achieve the purpose of energy saving

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