Serious efforts have been carried out in China towards the utilization of CO2 in different metallurgical processes. The research was initiated from feasibility study of CO2 used in steel making process, followed by the use of CO2 in decreasing the dust generation and further towards improving the dephosphorization efficiency in converter process. Industrial experiments on bottom blowing of CO2 in BOF and electric arc furnace have been carried out in the plant with positive results. CO2 is further applied in LF process for inclusions removal and in continuous casting process as shielding gas. CO2 is also used in stainless steel refining process for decarburization, and results show a significant retention of chromium because of CO2 introduction. CO2 has also been tried in the ferroalloy industry to produce medium and low carbon ferrochrome/ferromanganese in the converter. Experimental results show that the Cr yield has been increased when CO2 was introduced for M-LCFeCr production. The present paper aims to provide an overview of the progress of CO2 application as resources/reactants in ferrous metallurgy processes.
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