Method for stabilizing aluminum cell hearth

Abstract

Provided is a method for stabilizing the furnace tank of an aluminum reduction cell, which relates to a method of stabilizing the furnace tank of the aluminum reduction cell in the process of aluminumsmelting in the aluminum reduction cell. The invention is characterized in that the method includes the following steps, (1) molecule control should drop slowly from high to low, (2) electric voltageshould drop from fast to slow, (3) electrolyte should be abundant and the level of aluminum should be low before high, (4) the temperature of the electrolyte should smoothly drop from high to low. Utilizing the method of the invention, the formed furnace tank is characterized by strong stability, which is not easy to be molten. The formed furnace tank is very structured, which meets the need of the product of the modern aluminum reduction cell, strengthens the ability of self-balance of the aluminum reduction cell and realizes the objects of high current efficiency and low electrical energy consumption production.

Description

technical field [0001] A method for stabilizing the furnace of an aluminum electrolytic cell relates to a method for stabilizing the furnace of an aluminum electrolytic cell during the aluminum smelting process of the aluminum electrolytic cell. Background technique [0002] In the aluminum electrolytic production process, the furnace of the prebaked aluminum electrolytic cell refers to the deposition of corundum (α-Al 2 o 3 ) and cryolite to form an oval ring-shaped regular space. It is distributed around the anode, and the formed crust must have appropriate thickness and hardness, and be uniform throughout. The legs at the bottom of the ring structure should be regular and suitable in length, that is, they should not be too long to reach under the anode, and they should not be too short. Without stretching the legs, the mirror surface of the cathode aluminum liquid is too large. The ideal leg extension is that the remaining bottom of the tank (the mirror surface of the ...

AI Technical Summary

Problems solved by technology

[0003] The establishment and maintenance of the traditional furnace usually adopts two methods: the first is the combination of artificial auxiliary processing and technical condition adjustment; the second is the main technical condition adjustment method. In the actual production and operation process, the furnace established by these two methods It is very unstable and has poor heat resistance performance. There are often deformed furnaces with irregular "upper hole and long legs", which cause the electrolytic tank to swing more frequently. Sometimes the side carbon blocks are turned red and the tank shell leaks. Manual auxiliary processing operations have to be taken to locally repair the furnace to stabilize production. At the same time, the difficulty of automatic control of alumina concentration is increased during processing. The bottom of the furnace has precipitated crusts, forming a more irregular furnace, and the electrolytic cell has never been strong. Self-balancing ability, to a certain extent, restricts the optimization of electrolyzer indicators