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结合产品性能需求,对低碳低硅钢生产工艺控制难点及其冶炼工艺参数的优化进行了论证分析。分析认为:采用铁水预处理后,转炉终点w(S)均值控制到0.011%;在转炉C-O积为0.002 8时,终点w(C)控制在0.03%～0.05%,终点温度在1 670℃以上为宜;RH精炼过程中钢包渣w(TFe+MnO)控制在2.0%～6.0%,碱度R控制在4.0～5.0。吨钢底吹供气强度控制在0.70～1.00L/min时,钢液回Si基本可控制在0.005%以下,回P控制在0.002%以下。并对钢液w(T.O)的工序控制及冶炼参数优化进行了分析。
Combining with the demand of product performance, the difficulty in controlling the production process of low-carbon and low-silicon steel and the optimization of its smelting process parameters were analyzed. The analysis shows that the average value of w (S) at the end of the converter is controlled to 0.011% after the pretreatment with hot metal. The endpoint w (C) is controlled at 0.03% ~ 0.05% when the CO product of converter is 0.002 8, and the end temperature is above 1670 ℃ (RH), the ladle slag w (TFe + MnO) is controlled at 2.0% ~ 6.0% and the alkalinity R is controlled at 4.0 ~ 5.0. Ton steel blowing gas supply intensity control at 0.70 ~ 1.00L / min, the liquid steel can be basically controlled back to Si below 0.005%, back to P control 0.002% or less. The process control of molten steel w (T.O) and the optimization of smelting parameters were also analyzed.