Method for reinforcing heat preservation of corner pole of aluminum electrolysis cell

Abstract

The invention discloses a method for reinforcing heat preservation of a corner pole of an aluminum electrolysis cell. The method comprises the steps that when an anode is installed, the bottom palm ofthe anode (6) is installed about 2 cm above an electrolyte (11) in a suspended manner, the electrolyte is gradually molten through heat conduction, a cross beam busbar is gradually consumed to descend through other anodes, and the suspended corner anode makes contact with the molten electrolyte; then a gap among the corner anode, the electrolyte and an extension leg is put up with an aluminum oxide surface shell to form a cavity, and a layer of asbestos fiber blanket is laid to form bottom layer heat preservation; a layer of aluminum oxide crushing material retaining wall (5) is poured with the electrolyte at the position of 10 cm along the outer groove of the anode extension leg, and an aluminum oxide heat preservation material (7) is sufficiently used for thickening and heat preservation; the on-pole heat preservation material is added in a crushed material-aluminum oxide-crushed material-aluminum oxide staggered manner, and a layer of asbestos fiber blanket is laid on the on-pole heat preservation material after the material is put on the pole; and finally, the hole of an aluminum outlet (4) is covered with a trapezoid steel plate (3), and the gap is securely covered with a silicate board (2). According to the method, the heat preservation at the corner anode of the aluminum electrolysis cell can be enhanced, the operation quality can be improved, the operation is convenient, and the method is efficient and practical.

Description

technical field [0001] The invention belongs to the technical field of aluminum electrolysis, and in particular relates to a method for strengthening heat preservation of corner poles of an aluminum electrolytic cell. Background technique [0002] The cathode at the corner of the electrolytic cell is damaged, the aluminum liquid penetrates, destroys the insulation layer, and the heat dissipation at the bottom of the furnace increases. After manual repair, although the channel is blocked, the heat dissipation under the cathode at the corner is greater than that at other places. The outriggers and the side of the furnace are gradually enlarged, causing uneven consumption of the anode. During the aluminum tapping operation, the anode guide rod is bent and the explosive welding is cracked as the bus bar descends. Power failure and voltage swing phenomenon will increase the labor intensity of employees to deal with various abnormal situations and the cost of purchasing raw materi...

AI Technical Summary

Problems solved by technology

This method can melt fat outriggers and overly thick furnace sides, but it will cause overheating of cathodes in other parts, causing new cathodes to be damaged

In addition, after the manual processing of stretching the legs for too long, the heat loss of the electrolytic cell is large. In order to supplement the heat income, the only way to maintain a high set voltage for a long time is to increase the pole distance control, which causes high power consumption and increases production costs.

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