Graphitized carbon temperature raising agent and its preparation method

Abstract

The invention discloses a graphitized carbon temperature raising agent. The graphitized carbon temperature raising agent is obtained through mixing carbon powder, electrolytic graphite, cement and a bonding agent according to a certain ratio, and a technology of a steelmaking converter adopting the graphitized carbon temperature raising agent to supplement a heat source without increasing equipment or changing the technology has the advantages of simplicity, convenience, substantial effect and the like; the temperature raising effect is substantial, the insufficient heat source for semi-steel steelmaking is effectively compensated, and the compensation temperature at the blowing end point reaches above 40DEG C when 1t of the graphitized carbon temperature raising agent is added before blowing; and the components of slag can be improved, the alkalinity of the slag is not reduced, the content of FeO in the final slag is obviously reduced, and the quality of molten steel is increased.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a temperature raising agent for thermal compensation of converter steelmaking in the process of extracting vanadium and steelmaking. Background technique [0002] In the vanadium extraction steelmaking process, the main raw material for converter steelmaking is the semi-steel after vanadium extraction. Since the carbon content and temperature of the semi-steel are relatively low, and the S and P contents are relatively high, steelmaking often requires multiple times due to insufficient heat. Supplementary blowing, and many furnaces use iron oxide at the end point to reach a sufficient tapping temperature, resulting in high oxygen activity in the end point molten steel and high TFE in the slag, which adversely affects the smelted steel type, converter furnace age, and metal yield Therefore, the thermal compensation technology of converter steelmaking has become a key factor in ...

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Problems solved by technology

[0003] The publication number is CN 102443674 A, the invention patent of silicon carbide pellets and its use as a temperature raising agent in the converter smelting process. The applicant has carried out a lot of research work on the thermal compensation technology of converter steelmaking, successively coke, anthracite, carbonization Silicon and other temperature-raising materials were studied and tried, but they were all eliminated due to large defects. Although the semi-steel recarburizer used in the vanadium extraction station can increase the carbon content of the semi-steel, it is not sufficient for the insufficient heat source of the semi-steel. Played a certain mitigation effect, but its pertinence is not strong, and the cost is high