基于炼钢过程底吹气体热力学及动力学进行分析，研究了底吹氧气、二氧化碳、氩气、氮气的冶炼效果。研究结果发现，氩气或氮气不与熔池元素反应，底吹时熔池温度基本不变，钢中氮质量分数较高；底吹氧气或二氧化碳时，脱碳速率和钢中氮、氢质量分数基本相同，熔池温度升高了162和45℃。同时发现，与底吹氧气相比，二氧化碳可减少炼钢烟尘量，炉渣中w((TFe))降低2.50%，w((O))降低90.2%。
Based on thermodynamics and kinetics of bottom blowing during the steelmaking process,the smelting ef-fects of bottom blowing with O2,CO2,Ar and N2 were studied. It is found that the bottom blowing Ar or N2 does not re-act with the elements of molten pool. The temperature of liquid steel basically remains unchanged,while the nitrogen content in liquid steel is high. However,when the bottom blowing gas is O2 or CO2,the decarburization rate and the con-tent of nitrogen and hydrogen in liquid steel are basically the same,the temperature of molten pool is raised by 162 and 45℃,respectively. Compared with O2,if CO2 is injected from the bottom of furnace,the amount of steelmaking dust will be decreased,w((TFe)) in slag will be decreased by 2.50%,w((O)) will be decreased by 90.2%.
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