Abstract: Based on referential production data of 80 heats of SPHD, SPHE and IF steel, a calculation model for acid soluble aluminium content in molten steel- [Als] at end of RH refining deoxidizing by Al is established by using multiple linear regression analysis and the effect of activity of oxygen in liquid, adding aluminium for deoxidation and net circulation time of liquid at end of RH decarbonizing on end [ Als] is analyzed. Results show that the RH decarburization end activity of oxygen in liquid and adding aluminium amount for deoxidation are main factors to influence the end [ Als] ； as after RH decarburization the liquid temperature, activity of oxygen, FeO + MnO content in slag- ( FeO + MnO) and liquid net circulation time are respectively 1 600 °C , 2 x 10^-4, 15% and 8 min, in order to control the end [ Als] 0. 02% ~0. 05% , the adding aluminium amount in RH deoxidation process should be controlled in 0. 86 ~ 1. 53 kg/t.

摘要： 在参考80炉次SPHD、SPHE和IF钢生产数据的基础上,采用多元线性回归分析建立了用Al脱氧的RH精炼终点钢水酸溶铝含量-[Als]的计算模型,分析了RH脱碳结束时钢水氧活度、脱氧加铝量和钢水净循环时间对终点钢水酸溶铝含量的影响。结果表明,RH脱碳结束钢水氧活度、脱氧加铝量是影响终点钢水酸溶铝含量的重要因素;当RH脱碳后钢水温度、氧活度、炉渣中FeO+MnO含量-(FeO+MnO)以及钢水的净循环时间分别在1 600℃、2×10^-4、15%和8 min时,要控制终点钢水酸溶铝为0.02%~0.05%须在RH脱氧过程中控制加铝量0.86~1.53 kg/t。

关键词: 150 tRH精炼, 钢中酸溶铝含量, 控制, 计算模型