RH冶炼超低碳钢的最优工艺研究

Study on the optimum process of refining ULC steel by RH degasser

建立了RH碳氧反应模型,计算值和实际测量值吻合较好,可以模拟实际RH精炼过程中的碳氧反应.在一定的初始碳含量范围内,初始碳含量对RH脱碳结束的碳含量基本没有影响,同时,RH脱碳反应达到14min后其脱碳速度小于1.5×10-6min-1,脱碳反应接近平衡.随着钢包渣TFe含量的增高,RH脱碳反应降低的氧含量和碳含量的比值在降低.当钢包渣TFe含量为8%时,实际计算的碳氧线和理论的碳氧线接近.

A carbon-oxygen reaction model was developed to simulate actual reactions in the RH process,and the calculation results were in good agreement with the measurement results. It was found that the initial carbon content had no influence on the carbon content at the end of decarburization in RH. The carbon-oxygen reaction nearly reached equilibrium due to 14 minutes' reaction at a decarburization rate of less than 1.5×10-6 min-1. The ratio of ΔO/ΔC of decarburization in the RH process decreased with the increase in the TFe content of ladle slag,and the ratio was near the theory ratio when the TFe content was 8%.