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本文通过火力模型试验,对LD转炉从底部吹入适量的Ar、N_2、CO_2气体熔池中金属成分变化及炉渣形成的研究结果表明:项底复合吹炼法,熔池中金属成分变化与LD转炉法没有本质的区别,只是反应速度有所差异,Si氧化速度较快,吹炼4分钟已氧化到0.02％以下,而Mn则在S的氧化过程中被还原,C氧化速度较快,C-O关系由P_(co)1大气压(1600℃)平衡曲线向0.5大气压方向推移,终点钢中C可达0.02％以下。炉渣形成速度较快,石灰熔化率可达94％以上,脱P、脱S效果均优于LD转炉法。
In this paper, through the fire model test, the study on the change of the metal composition and the slag formation in the LD converter from the bottom blowing in the appropriate amount of Ar, N_2, CO_2 gas pool results show that: the bottom compound blowing method, metal composition changes in the molten pool and LD Converter method is not essential difference, but the reaction rate is different, Si oxidation faster, blowing 4 minutes has been oxidized to less than 0.02%, and Mn is S in the oxidation process is reduced, C oxidation faster, CO The relationship is shifted from the equilibrium curve of 1 atm (1600 ° C) to 0.5 atm and the C content in the final steel can reach 0.02% or less. Slag formation rate is faster, melting rate of lime up to 94%, off P, off S effect are better than the LD converter method.