Method for controlling crusting thickness of furnace bottom of aluminum electrolysis cell

Abstract

The invention relates to the technical field of non-ferrous metallurgy, in particular to an aluminum electrolysis cell furnace bottom crusting thickness control method which specifically comprises the following steps that S1, electrolyte in an electrolysis cell is heated to be in a molten state, and AlF and MgO are added into the electrolyte; s2, AlO powder is added; s3, the electrolytic cell continuously runs, crusting is gradually conducted in the electrolytic cell, when the crusting thickness is larger than or equal to a preset upper threshold value, local heating is started, and when the crusting thickness is smaller than or equal to a preset lower threshold value, local heating is stopped; and whether local heating operation is carried out and heating intensity is adjusted is determined according to the crusting thickness. The solidified electrolyte in the target area is heated to be crusting and melted, and then the crusting thickness is stabilized within a reasonable range. The operation is simple, convenient and feasible, can be quickly implemented without complex data modeling, and is low in operation threshold.

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