High-electrical-conductivity flat steel as well as smelting process thereof and application thereof

Abstract

The invention relates to the technical field of flat steel, in particular to high-electrical-conductivity flat steel as well as a smelting process thereof and application thereof. The high-electrical-conductivity flat steel comprises the following components in percentage by weight: less than or equal to 0.04% of C, greater than 0 and less than or equal to 0.4% of Sc, less than or equal to 0.25% of Si, less than or equal to 0.2% of Mn, less than or equal to 0.02% of P, less than or equal to 0.01% of S and the balance of Fe. The smelting process for the high-heat-conduction flat steel comprisesthe following steps of performing converter smelting and LF refining on molten steel, and forming, wherein the converter smelting method comprises the following steps of feeding an AlFe alloy and anAl line into the molten steel to perform smelting, and adding synthesis residues after tapping to perform slag washing; and the LF refining method comprises the following steps of refining and performing desulfuration on converter-smelted materials, and feeding a SiCa line and an Sc line. The flat steel has excellent electrical conductivity, and can be used as a cathode material of electrolytic aluminum, so that electric energy can be greatly saved in a production process of electrolytic aluminum, and production cost is greatly reduced.

Description

technical field [0001] The invention relates to the technical field of flat steel, in particular to a high-conductivity flat steel and its smelting method and application. Background technique [0002] Electrode flat steel is a consumable material used in electrolytic aluminum plants for cathode conductive rods. With the development of the electrolytic aluminum industry, the market demand for electrode flat steel is also increasing. According to statistics, for every 600,000 tons of electrolytic aluminum produced, about 10,000 tons of electrode flat steel is needed. [0003] At present, in the production of the aluminum industry, the Hall-Elu method, which has been passed down for more than 100 years, is adopted, that is, the cryolite-alumina molten salt electrolysis method, and the main equipment is the aluminum electrolytic cell. During the electrolysis process, the current flows from the anode into the electrolyte, from the electrolyte into the aluminum liquid, from the ...

AI Technical Summary

Problems solved by technology

[0005] At this stage, the commonly used electrode flat steel materials include Q195 steel, Q215 steel and Q235 steel, etc. These materials are easy to obtain, low in cost, and meet the requirements of hardness, but their electrical conductivity at high temperatures restricts their further development.