Basic Study on Mixture Gas Including CO2 and O2 Blown into Converter

Based on the thermod ynamic analysis of mixture gas including CO2 and O2 blown into BOF together with the experimental results of blowing mixture gas including CO2 and O2 into simulative converter at the final blowing stage in laboratory, the feasibility of blowing CO2 and O2 into the top blown converter for decarburization and control of oxygen is discussed. It is concluded that the product of carbon and oxygen reduces and the influence of the lance location on the prod-uct weakens as the ratio of CO2 in mixture gas increases, but the quantity of rephosphoration in-creases. when the ratio of CO2 in mixture gas increases to the 1 to 1 degree of CO2 and O2, the product of carbon and oxygen can be controlled between 0.23×10-6 and 0.25×10-6 in top blown converter and the average quantity of rephosphoration 0.001% while the theoretical maximum ratio of CO2 in mixture gas can increase up to 79.1%.