基于转炉反应动力学的钢液成分与温度的预测

Prediction of molten steel composition and temperature based on converter reaction kinetics

顶底复吹转炉由于其复杂的过程热力学及动力学,针对转炉冶炼过程预测模型的搭建以及应用一直是炼钢研究的热点。为了实现过程及终点钢液成分以及渣成分的预测,建立了基于射流冲击区-乳化区-渣钢反应区内反应速率动态变化的转炉预测模型。实际运行结果表明,脱磷的主要区域在渣-钢反应区,占脱磷量的72.5%,其次为乳化区,占脱磷量的27.5%;脱碳的主要区域在射流冲击区,占总脱碳量的87%,其次为乳化区,占脱碳量的13%。转炉终点C质量分数平均偏差在±0.0058%,终点P质量分数平均偏差在±0.0024%,温度平均偏差在±5.8℃。

Because of the complex process thermodynamics and kinetics of top bottom combined blowing converter,the establishment and application of prediction model for converter refining process are always a hot topic in steelmaking research.In order to predict the composition of molten steel and slag in the process and end point,a prediction model of converter based on the reaction rate in jet impact zone,emulsion zone and slag-metal reaction zone was established in this paper.The simulation results showed that the main dephosphorization area was the slag-metal reaction zone,accounting for 72.5%of the total dephosphorization amount,followed by the emulsion zone,accounting for 27.5%of the total dephosphorization amount.The main decarburization area was the jet impact zone,accounting for 87%of the total decarburization amount,followed by the emulsion zone,accounting for 13%of the total decarburization amount.The average deviation of C mass fraction at the end point of converter was±0.0058%,that of P mass fraction at the end point was±0.0024%,and that of temperature was±5.8℃.