Furnace door type thermal insulation composite covering method and device for aluminum electrolytic cell

Abstract

The invention discloses a furnace-door-type thermal insulation composite covering method and device for an aluminum electrolysis cell. According to the method, two or more integrally-formed thermal insulation composite covering devices are arranged between the inner side of an entire circle of cell shell of the aluminum electrolysis cell and the outer side of an anode set and located above an electrolyte liquid level and a side furnace ledge and below a cell shield plate, each single thermal insulation composite covering device can be opened and closed independently, and accordingly the furnace-door-type thermal insulation covering complete device which is covered thoroughly along the entire circle of the cell shell can be formed. A traditional side covering mode using electrolyte aluminum oxide mixed powder for edge closing is replaced, and meanwhile the thermal insulation, gas collection and anti-oxidation functions of an existing powdery covering material are integrated. By means of the furnace-door-type thermal insulation composite covering method and device, a traditional scattered electrolyte aluminum oxide mixed powder shaping thermal insulation covering device can be replaced, and the thermal insulation and sealing properties are good. Meanwhile, the thermal insulation composite covering device has good shaping performance and abrasion resistance.

Description

technical field [0001] The invention belongs to the technical field of aluminum electrolysis, and in particular relates to a method and a complete set of devices for reducing the energy consumption of aluminum electrolysis production and replacing the existing electrolyte and alumina mixed powder for edge closing. Background technique [0002] Improving the technical level of aluminum electrolysis equipment during production and operation is the key to realizing energy saving, consumption reduction and emission reduction in aluminum electrolysis production. In the production and operation of the existing aluminum electrolytic cell, the composition of the anode covering material is a mixture of electrolyte particles and alumina particles of different particle sizes. The covering material mainly plays the role of heat preservation and preventing oxidation of the anode surface. Add manually. [0003] In today's electrolysis production process, pole changing has almost become a...

AI Technical Summary

Problems solved by technology

However, more manual participation makes it difficult to monitor and implement quantitative indicators in the actual implementation process, and it is difficult to standardize the display characteristics of electrolyzers in each section and area

[0005] In addition, with the operation of production and the continuous consumption of anodes, the thermal conditions at different positions also change, and the existing anode covering method is difficult to adjust the thermal conditions.

[0006] Due to the strong corrosion of the electrolyte, the thermal insulation composite covering device will be affected by it and it is difficult to ensure a long life cycle

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