Converter steelmaking

Abstract

A converter steelmaking method is provided, which can produce steel products with different CO2 emissions by tracking CO2 emissions during the steelmaking process. The solution of this invention is a converter steelmaking method using: a plurality of melting furnaces with different CO2 emission intensities per unit mass of molten iron, one or more transport containers for transporting the molten iron melted in the aforementioned melting furnaces, and a converter for loading the molten iron for refining; it includes: a first step of specifying the CO2 emission intensity of the molten iron in each of the aforementioned melting furnaces using a melting furnace CO2 emission intensity specification method; a second step of determining the ratio of molten iron to chills in each of the aforementioned melting furnaces loaded into the converter, based on the specified CO2 emission intensity of the molten iron in each melting furnace and according to the required CO2 emission intensity set for each melting furnace cycle of the converter; and a third step of loading the molten iron and chills from each of the aforementioned melting furnaces into the converter according to the determined ratio.

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