Method for preparing prebaked aluminum cell fire eye

Abstract

The invention relates to a method of repairing a fire hole of pre-baked aluminum reduction cells. The invention is characterized in that the process of repairing is to place a passage of tapered strainer in the fire hole, pour the liquid electrolyte between the strainer without bottom and the naked part of the anode of the fire hole, then quickly spray aluminum oxide bulk material on the liquid electrolyte and take out the strainer without bottom after the anode of the fire hole is consolidated and pasted. Employing the method of the invention, the anode is completely coated by the consolidated liquid electrolyte and the aluminum oxide, which prevents the occurrence of oxidation and dreg losing, the period of use of the anode is extended, the carbon consumption per ton aluminum is reduced, the rinsing of steel claw caused by the oxidation of the anode is avoided, and the quality grade of the original aluminum is improved.

Description

technical field [0001] The invention relates to a method for repairing a fire hole in a prebaked aluminum electrolytic cell. Background technique [0002] During the aluminum smelting process of the aluminum electrolytic cell, according to the technical requirements of the normal production process, several fire holes should be left between the two rows of anode groups in the prebaked aluminum electrolytic cell to keep them clear, so that the aluminum oxide, the raw material for aluminum smelting, can smoothly enter the cell for melting, and at the same time The anode should also be covered and protected with insulating material to prevent oxidation. However, in the actual production process of aluminum smelting, the anode at the fire hole cannot be completely covered with materials, and some parts are exposed and oxidized to slag, which causes the anode steel claw to be rinsed by the liquid electrolyte in the aluminum electrolytic cell, which reduces the quality of the prim...

AI Technical Summary

Problems solved by technology

However, in the actual production process of aluminum smelting, the anode at the fire hole cannot be completely covered with materials, and some parts are exposed and oxidized to slag, which causes the anode steel claw to be rinsed by the liquid electrolyte in the aluminum electrolytic cell, which reduces the quality of the primary aluminum and increases the concentration of the electrolyte. Carbon slag content and anode current density reduce the anode life cycle, increase carbon consumption per ton of aluminum anode, reduce current efficiency, and increase DC power consumption