180 t RH真空精炼炉脱硫工艺开发及应用
赵家七，蔡小锋，邹长东
江苏省沙钢钢铁研究院，江苏 张家港 215625
Development and application of desulfurization process for 180 t RH vacuum refining furnace
ZHAO Jia-qi，CAI Xiao-feng，ZOU Chang-dong
（Institute of Research of Iron and Steel， Jiangsu Province（Shasteel）， Zhangjiagang 215625， Jiangsu， China）
摘要 针对铝镇静无取向硅钢成品硫质量分数超标问题，开发了RH脱硫工艺。通过选择合适的脱硫渣系以及工艺参数，使RH工位脱硫率达到30%～60%，W800系列无取向硅钢成品[w([S])≤]0.005 0%，达标率由72.19%提高至98%以上，同时确保了RH出钢[w(T[O])]＜0.002 0%，[w([N])]＜0.001 5% 。通过转炉出钢和RH过程炉渣脱氧改质，将RH出钢渣中[w((TFe))]控制在3%以下，RH过程炉渣碱度保持在5.0以上，使渣-钢之间硫的分配比达到80～260，有助于提高RH脱硫效果。
关键词 ：
无取向硅钢 ,
RH真空炉 ,
脱硫剂 ,
钢包渣
Abstract ：The desulfurization technology in the RH process was developed to reducethe sulfur mass percent in the non-oriented silicon steel. The desulfurization degree was controlled at 30%-60% in a RH reactor， and the ratio of in the W800 non-oriented silicon steel with[w([S])≤0.005 0%] was increased from 72.19% upto 98%. Meanwhile， this process was able to ensure that [w(T[O])＜]0.002 0% and[w([N])＜]0.001 5% at the end of the RH treatment. Through the slag deoxy-modification during the tapping and the RH treatment，[w((TFe))]at the end of the RH treatment was controlled below 3%. The slag basicity was kept above 5.0， and the sulfur distribution ratio between slag and steel was controlled at 80-260，which is favored to the improvement of the desulfurization process in the RH treatment.
Key words ：
non-oriented silicon steel
RH vacuum furnace
Desulfurizer
Ladle Slag
收稿日期: 2018-03-28
出版日期: 2018-11-20
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