Method for reducing flow rate of aluminium liquid in electrolysis bath and slowing down cathode abrasion

Abstract

The invention relates to a method for reducing the flow rate of aluminium liquid in an electrolysis bath and slowing down cathode abrasion, belonging to the technical field of electrolytic aluminium. Aiming at the electrolysis bath provided with cathode carbon blocks with covex structure on the surfaces, a refractory material wallboard is arranged at the upper part of carbon ramming paste betweenthe two adjacent cathode carbon blocks of the electrolysis bath, an the upper surface of the refractory material wallboard has the same height as preiection on the surfaces of the cathode carbon blocks or is higher than the upper surface of the preiection of the cathode carbon blocks; and the shape of the upper surfaces of the cathode carbon blocks at the side of the refractory material wallboardis flat or has the convex structure. The method can slow down the flow rate of the aluminium liquid, reduces the fluctuation of the aluminium liquid, improves the stability of the aluminium liquid level inside the electrolysis bath, reduces the abrasion for the preiection on the surfaces of the cathode carbon blocks, and has no influence on the aluminium electrolysis process and the quality of aluminium.

Description

technical field [0001] The invention belongs to the technical field of electrolytic aluminum, and in particular relates to a method for reducing the flow rate of molten aluminum in an electrolytic tank and slowing down the abrasion of cathodes. Background technique [0002] At present, pure aluminum in industry is produced by molten salt electrolysis. Aluminum electrolysis production requires high power consumption, and its DC power consumption can be expressed by the following formula: [0003] [0004] where V 平 is the average voltage of the electrolyzer, and CE is the current efficiency of the electrolyzer. [0005] It can be seen from the above formula that in order to reduce the power consumption of aluminum electrolysis production, it can be realized by reducing the voltage of the electrolytic cell. In the current industrial electrolytic cell, if the current efficiency is kept constant, the cell voltage of the electrolytic cell is reduced by 0.1 volts It can reduc...

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problems of fast flow rate of aluminum liquid, fluctuation of liquid level and serious abrasion of cathode by liquid aluminum in the current aluminum electrolysis process, the present invention provides a method for reducing the flow rate of liquid aluminum in the electrolytic cell and slowing down the abrasion of the cathode, so as to improve the efficiency of the electrolytic cell. The purpose of stability of cathode aluminum liquid, reduction of protruding cathode consumption, and improvement of electrolytic cell life

Images