Structure and method for reducing aluminum electrolysis anode steel-carbon voltage drop

Abstract

The invention discloses a structure and method for reducing aluminum electrolysis anode steel-carbon voltage drop. The structure comprises an anode steel claw, a phosphorous pig iron ring and a carbonblock, wherein the carbon block is provided with a cylindrical carbon bowl; a claw head of the steel claw is inserted into the carbon bowl; and the phosphorous pig iron ring is cast between the clawhead and a circular seam of the carbon bowl. The structure is characterized in that an easily-conductive metal plating layer is plated on the surface, making contact with the steel claw and the phosphorous pig iron, of the carbon bowl. The implementation method includes the steps that in the aluminum electrolysis anode assembling process, the easily-conductive metal plating layer is plated on thesurface of the carbon bowl of the anode carbon block and then connected with the phosphorous pig iron used for the steel claw in a casting mode, and a new anode is assembled and then used for an electrolytic bath. By means of the structure and the method, the situation of poor connection between the carbon block and metal in an aluminum electrolysis anode can be effectively avoided, the steel clawis more fully and compactly connected with the carbon block, the contact resistance is reduced, and the reduction of the anode steel-carbon voltage drop and reduction of power consumption are achieved. By means of the structure and method provided by the invention, the anode steel-carbon voltage drop can be reduced by at least 20 mV on average, and therefore the power consumption per ton aluminumis effectively reduced.

Description

technical field [0001] The invention belongs to the technical field of aluminum electrolysis metallurgy, and mainly relates to a structure and method for reducing the steel-carbon pressure drop of an aluminum electrolysis anode. Background technique [0002] After decades of development in my country's electrolytic aluminum industry, the production scale has continued to expand, and the level of technology and equipment has also been greatly improved. However, in terms of overall production conditions, the comprehensive utilization efficiency of electrolytic aluminum energy in my country is still 15% lower than the international advanced level. About 1 ton of aluminum power consumption is 300-800kWh higher than the international advanced level, so achieving further energy saving and consumption reduction has always been a major issue for the domestic electrolytic aluminum industry. The carbon anode is known as the "heart" of the electrolytic cell. The entire anode voltage dro...

AI Technical Summary

Problems solved by technology

In short, the above methods have played a certain role in reducing the steel-carbon pressure drop, but they have not effectively solved the aforementioned essential problem of poor contact between the carbon block and the metal interface at the microscopic level, and there is still a large room for steel-carbon pressure drop reduction.

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