A compound heat preservation method and structure of aluminum electrolysis continuous prebaked anode

Abstract

The invention discloses an aluminum electrolysis continuous prebaked anode composite heat preservation method and structure. The aluminum electrolysis continuous prebaked anode composite heat preservation method is characterized in that on the premise that aluminum oxide heat preservation covering materials on the periphery of an existing pre-baked anode carbon block and the inner periphery of anelectrolytic cell are retained, and aluminum oxide heat preservation covering materials on the upper surface of the anode carbon block are removed, foaming heat preservation cover plates are correspondingly additionally arranged on the upper surface of the anode carbon block, the aluminum oxide heat preservation covering material on the periphery of the anode carbon block and the aluminum oxide heat preservation covering materials on the inner periphery of the electrolytic cell in a covering mode, and foaming heat-preservation sealing auxiliary small strips are arranged in an auxiliary mode soas to reinforce heat preservation. The aluminum electrolysis continuous prebaked anode composite heat preservation method and structure have the characteristics that air on the surface of the anode carbon block is thoroughly isolated, and the oxidation loss on the surface of the anode carbon block is prevented; the heat preservation effect is good, the heat energy loss is small, and the power consumption of the electrolytic cell can be greatly reduced; and the sintered aluminum oxide heat preservation covering materials are arranged on the periphery of the anode carbon block, an old anode carbon block from which anode steel claws are removed is supported, and the upper surface of the old anode carbon block is provided with the aluminum oxide heat preservation covering materials, so that the connection with a new anode carbon block is greatly facilitated, bonding between the new anode carbon block and the old anode carbon block is firm and reliable, and the production cost is low.

Description

technical field [0001] The invention relates to a compound heat preservation method and structure of an aluminum electrolysis continuous prebaking anode, in particular to a compound heat preservation method and structure of an aluminum electrolysis continuous prebaking anodic oxide heat preservation covering material and a foam heat preservation cover plate. Background technique [0002] Now the pre-cultivated anodes are all insulated with a single alumina insulation covering material. The alumina insulation covering material itself is not an insulation material, and its main component is Al 2 o 3 , while AL 2 o 3 The thermal conductivity of thermal insulation materials is 31.4W / m.k. Generally, materials with thermal conductivity less than 0.12W / m.k are called thermal insulation materials. The thermal conductivity of foam thermal insulation materials is generally less than 0.05W / m.k. The thermal conductivity of foam thermal insulation materials is about 1 of alumina. / 600...

AI Technical Summary

Problems solved by technology

In the aluminum electrolysis production process, the heat energy released by the combustion of the anode carbon block is basically constant, but it is not enough to maintain the heat balance of the electrolytic cell. great electrical potential

[0004] The production of prebaked anode electrolytic aluminum is a traditional classic production method. Since the technology matured in the 1970s, a large number of Chinese and foreign enterprises, scientific research institutions and universities have been committed to the research of electrolytic aluminum heat preservation and power saving, but none of them have changed the electrolytic cell. Insulation form of upper single alumina covering material insulation

[0005] When the aluminum electrolysis continuous prebaked anode hollow pouring, aluminum water casting-mechanical composite steel claw developed by the inventor forms a new anode carbon block assembly with the anode carbon block, the single alumina covering material of the existing electrolysis process is used as When the anode of the electrolytic cell is kept warm, the alumina insulation covering material cannot completely isolate the air, and the heat preservation effect is poor, resulting in a large amount of heat loss; It is easy to sinter and adhere to the upper surface of the anode carbon block and the carbon bowl. When connecting the new anode carbon block, it is inconvenient to take out the hollow pouring, aluminum water casting-mechanical composite steel claw from the old anode carbon block. Reduce the firmness and reliability of the bonding connection between old and new anode carbon blocks

[0006] In summary, the existing technology cannot completely isolate the air, and the surface of the anode carbon block is severely burned; the heat preservation effect is poor, causing a large amount of heat energy loss and increasing the power consumption of the electrolytic cell; the alumina covering material on the upper surface of the anode carbon block reduces The bonding strength of the new and old anode carbon blocks, the technical problem that it is inconvenient to connect the new anode carbon blocks

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