Experimental Study of CO2 for Vanadium Extraction by Segmented Combined Blowing in Converter

In order to further explore the application of CO2 in vanadium extraction in combined blowing converter, the initial injection temperature was 1300 and 1320 °C, and the CO2 ratio changed with the injection time of 1, 3, 6, and 10 min when the initial proportion was 10, 15, 20, and 25%, and finally reached 40% for segmented combined blowing. The variation of C and V contents and bath temperature at different initial injection temperatures was investigated, and compared with the constant-ratio combined blowing with CO2 ratio of 10, 15, 20, 25% at 1320 °C. It was concluded that the optimal initial injection temperature of segmented blowing is 1300 °C and the optimal initial injection flow is 15%, which has little impact on the vanadium oxidation rate, and the carbon retention effect is better than the constant-ratio blowing, and the end temperature can be properly controlled.