Method for baking coke particles for specially-shaped cathode aluminum electrolytic tank

Abstract

The invention discloses a method for baking coke particles before the starting of a specially-shaped cathode aluminum electrolytic tank, which belongs to the technical field of metallurgy. The method comprises the steps of paving coke particles on the surface of the cathode of the aluminum electrolytic tank, and baking the coke particles by electrifying after fixing an anode. The process for paving the coke particles comprises the following steps of: paving a layer of coke particles with small size fraction in a concave groove of a specially-shaped cathode, wherein the paving thickness is 5-10 mm; paving a layer of mixed coke particles of the coke particles with the small size fraction and the coke particles with normal size fraction, wherein the paving thickness is 10-20 mm; paving the coke particles with the common size fraction until the coke particles with the common size fraction are flush with the layer of the coke particles paved on the surface of a boss of the specially-shapedcathode; and paving the coke particles with the common size fraction on the surface of the boss of the specially-shaped cathode, wherein the paving thickness is 15-25 mm. By paving the coke particleswith different size fractions on the surface of the cathode, the cathode and the anode of the electrolytic tank are prevented from being oxidized during baking, so all parts of a tank body can be uniformly heated in a mode of meeting the requirements of a heating curve, and the aim that the temperature of the tank body of the electrolytic tank finally meets the startup condition is fulfilled.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and relates to a method for roasting coke particles of an aluminum electrolytic cell, in particular to a method for roasting coke particles of a special-shaped cathode electrolytic cell. Background technique [0002] Aluminum smelting technology has gone through a long process, and industrial aluminum production mainly adopts molten salt electrolysis. With the continuous development of aluminum smelting technology, electrolytic cells are gradually developing towards large-scale prebaked anode aluminum electrolytic cells. The power supply of the electrolysis series adopts large aluminum bus bars, and the strong electromagnetic field affects the aluminum liquid in the tank until it affects the energy consumption of electrolysis production. In order to improve the flow state of aluminum liquid in the tank and realize the purpose of energy saving, emission reduction and consumption reduction in e...

AI Technical Summary

Problems solved by technology

For special-shaped cathode electrolytic cells, due to the differences between the cathode surface and the traditional electrolytic cell cathode surface, and the insufficient contact between the palm surface of the anode bottom and the cathode surface, the charred grain roasting method used in the traditional electrolytic cell has serious deficiencies: the laying of charred grains The technology, the generation and utilization of medium heat during the roasting process, and the heating up of the furnace body cannot meet the roasting requirements of the electrolytic cell.

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