Method for baking mixed coke particles and electrolyte for specially-shaped aluminum electrolytic tank

Abstract

The invention discloses a method for baking mixed coke particles and electrolyte for a specially-shaped cathode aluminum electrolytic tank, which belongs to the technical field of metallurgy. The method comprises the following steps of: paving mixed materials of the coke particles and the electrolyte which serve as a medium on a concave groove and a boss on the surface of a cathode; fixing an anode; and baking the mixed materials by electrifying. Industrial tests and application prove that the method for baking the mixed coke particles and electrolyte for the specially-shaped cathode aluminumelectrolytic tank not only can ensure that the novel electrolytic tank uniformly heats up according to a heating curve but also can ensure uniform current distribution on the anode of the electrolytic tank during the process of baking and electrifying, and controllable, stable and uniform state of the temperature of the electrolytic tank and the temperature rising. Besides, as the coke particles consumption is greatly reduced, exception generated when the specially-shaped electrolytic tank is baked by adopting the coke particles and other mediums is effectively avoided; and meanwhile, due to the packing of the electrolyte, the addition of the electrolyte is reduced during startup, which greatly contributes to improving efficiency of the startup of the electrolytic tank after baking and the process of the management and the operation after starting.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and relates to a colloidal particle roasting method for an aluminum electrolytic cell, in particular to a mixed roasting method for coke particles and electrolytes in 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 co...

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.

Since the surface of the heterogeneous structure cathode is designed to be concave-convex, a large amount of coke particles are required when using coke particles for roasting, which is not conducive to the removal of coke particles during the start-up process, and the coke particles trapped in the electrolyte affect the cell condition after start-up

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