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| Application of CO2 in BOF |
| WAN Xue-feng，CAO Dong，LIU Xiang，ZHU Xiao-lei，LIAO Xiang-wei |
| Iron and Steel Academe of Ansteel Group， Anshan 114009， Liaoning， China |
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Abstract By the thermodynamic analysis of top blowing CO2 in the converter， combined with laboratory simulation result of top blowing O2＋CO2 mixture gas in converter， some key parameters of CO2 used in converter were established. It is concluded that although pure CO2 injected in the converter could achieve decarburize， the drop of temperature was rather large. When the CO2 supplying intensity was 3.0 m3/(t·min)， the reduction of temperature was 15.1 ℃/min； By blowing O2＋CO2 mixture gas， temperature balance could be realized， but the largest theoretical proportion of CO2 in mixture gas was 79.1%； with the increase of CO2 proportion， the carbon and oxygen product of molten steel at the blowing end was reduced， under the condition of [φ(CO2)∶][φ(O2)＝1][∶]1， the carbon and oxygen product could be controlled in the range of (25～32)×10－8.
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Received: 06 May 2014
Published: 28 April 2015
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2015, Vol. 50 
