A hanging refractory and thermal insulation component for a large-capacity alumina co-production electrolyzer

Abstract

The invention belongs to the technical field of aluminum smelting, and in particular relates to a hanging fire-resistant and heat-preserving assembly for a large-capacity alumina co-production electrolytic cell. The assembly includes a metal rod, a hose, an insulation layer and a refractory layer, and the metal rod and the aluminum electrolytic cell are separated by a refractory layer; the metal rod is wrapped with a hose, and the metal rod and the hose are filled with an anti-expansion and anti-oxidation buffer Powder mixture; the hose is wrapped with an insulation layer, the lower part of the insulation layer is provided with a refractory layer, and the insulation layer and the refractory layer are sealed; the metal rod, the insulation layer and the refractory layer are fixedly connected. Aiming at the large-capacity non-carbon anode vertical electrolytic cell, the present invention proposes a refractory and thermal insulation component that can be freely combined, easy to lift, and convenient to move, and solves the problem that the connection between the refractory thermal insulation material and the metal will be caused by the thermal expansion or oxidation of the metal. The problem of cracking of refractory insulation materials.

Description

technical field [0001] The invention belongs to the technical field of aluminum smelting, and relates to a suspended refractory thermal insulation component for a large-capacity oxy-aluminum co-production electrolyzer. Background technique [0002] The current Hall-Herout aluminum electrolytic cell uses consumable carbon anodes, which not only consumes a large amount of carbon materials mainly composed of high-quality petroleum coke, but also emits a large amount of greenhouse gas CO 2 , strong greenhouse gases fluorocarbons (CFs) 4 , C 2 F 6 ), SO 2 , and in the current aluminum electrolysis process, it is necessary to constantly replace the pre-baked anode carbon block, which leads to unstable electrolysis production, and increases the labor intensity, the personal risk of workers facing high-temperature melt, and the unorganized emission of fluoride; Carcinogenic aromatic compounds (PAH), SO are also emitted during the production of carbon anodes 2 , dust, these are ...

AI Technical Summary

Problems solved by technology

[0009] Because of the need for heat preservation and reduction of heat dissipation, various refractory and heat-insulating suspensions are required on the upper part of the electrolytic cell, but the connection between the refractory and heat-insulating material and the metal will cause the refractory and heat-insulating material to break due to the thermal expansion or oxidation of the metal

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