High-conductivity steel for anode rigid claw and preparation method of steel

Abstract

The invention discloses high-conductivity steel for an anode rigid claw and a preparation method of the steel, and belongs to the technical field of low-alloy steel. Trace alloy elements are added, the total quantity and proportion of the alloy elements are controlled, a proper preparation technology is used fro controlling a reasonable structure composition and grain size, and the steel materialwith good conductivity and mechanical property and structural function integration and for the anode rigid claw is obtained. The steel comprises, by weight, 0.01-0.1% of C, 0.01-0.5% of Si, 0.01-1.0%of Mn, 0-0.01% of S, 0-0.02% of P, 0.01-0.5% of Al, 0.01-0.2% of V, 0.004-0.02% of N and the balance Fe and inevitable impurities. C, Si, Mn, P, S, Al, V and N simultaneously meet the requirements that the content sum of C, Si, Mn, P, S, Al, V and N is larger than or equal to 0.35%, V / (C+N) is larger than or equal to 0.45 and smaller than or equal to 5.8, V / Al is larger than or equal to 0.25 and smaller than or equal to 1.2, the content of ferritic structures in the steel is not lower than 90%, the content of pearlitic structures is not higher than 10%, and the average grain size of the steelis larger than or equal to 20 micron and smaller than or equal to 200 micron . The high-conductivity steel for the anode rigid claw can be used for the anode rigid claw in electrolytic aluminum.

Description

technical field [0001] The invention belongs to the technical field of low-alloy steel, and in particular relates to a high-conductivity steel for anode steel claws and a preparation method thereof. Background technique [0002] China is currently the country with the largest output of electrolytic aluminum in the world. In 2016, the global output of electrolytic aluminum was 58.89 million tons. The output of electrolytic aluminum in my country has reached 31.64 million tons, accounting for 53.7% of the global output of electrolytic aluminum. Electrolytic aluminum is a high-energy-consuming industry. The cost of electricity in the cost of electrolytic aluminum accounts for about 40% of the production cost of aluminum ingots. According to research, the pressure drop of the anode steel claws during the aluminum electrolytic production process is an important reason for the increase in the production cost of aluminum ingots. [0003] The anode steel claw is an important connect...

AI Technical Summary

Problems solved by technology

In electrolytic aluminum production, the average voltage drop of this type of anode steel claw is about 50-80mV, which will lead to an increase in power loss during aluminum electrolytic production, thereby increasing the production cost of aluminum ingots

In addition, the metallurgical quality of anode steel claws produced by casting is poor, and the mechanical properties fluctuate greatly. During the production of electrolytic aluminum, the deformation and damage rate of anode steel claws is as high as 20-35%, which will greatly increase the production cost of electrolytic aluminum

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