材料期刊网

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。

Combined with demands of product performance, the difficulties of manufacture control and process parameters of low-carbon low-silicon steel smelting were analysed in this paper. The analysis showed that through the hot-metal pretreatment process, the average sulfur content of liquid steel at the end-point of converter could be controlled at 0. 011%. When the carbon-oxygen product in converter was 0.002 8 and the end-point carbon content of liquid steel was controlled between 0. 03 % -- 0.05 %, the end-point temperature should be controlled above 1 670 ℃. During RH refining, the content of (TFe +MnO) of ladle slag should be controlled between 2.0 %-6.0 %, the basicity of ladle slag should be controlled between 4.0--5.0; and the flux intensity of argon used for bottom stirring was controlled between 0. 70--1.0 L/min per ton. As a result, Si pick-up from slag could be controlled below 0. 005 % and P pick-up below 0. 002 %. A detailed analysis on T(O) of liquid steel and the optimization of smelting parameters were also given.