炉渣脱氧改质工艺对铝镇静硅钢总氧含量的影响  

Effect of slag deoxidation modification process optimization on the total oxygen content of aluminium deoxidization silicon steel

作　　者：赵家七 邹长东 耿涛 刘飞 

机构地区：[1]江苏省(沙钢)钢铁研究院,江苏张家港215625

出　　处：《炼钢》2016年第2期12-17,共6页Steelmaking

摘　　要：针对铝镇静无取向硅钢冶炼过程中钢水、炉渣氧势过高，导致RH终点钢水总氧含量控制不稳定的问题，进行了转炉出钢、RH过程脱氧造渣工艺优化研究。结果表明：RH进站钢水砌（O）由原工艺的（400-900）×10^-6稳定在650×10^-6以下，RH脱碳结束钢水w（O）控制在450×10^-6以下；RH进站炉渣w（T．Fe）由原工艺的10％～25％降至15％以下，RH出站渣中w（T．Fe）由2％～12％降至3％以下，RH处理过程炉渣碱度均控制在3．0以上；RH终点侧（T．O）由原工艺的（15～30）×10^-6降至15×10^-6以下，钢水洁净度较原工艺显著改善。To the question of the unsteadiness of the steel oxygen content at the end of RH vacuum treatment for the aluminium deoxidization non-oriented silicon steel refining, the oxygen potential of molten steel and slag was optimized during tapping and deoxidation alloying process. Results show that the oxygen mass fraction of non-oriented silicon steel is stably controlled below 650 ×10^-6 as it was （400 - 900） ×10^-6 before optimization. Furthermore, T. O mass fraction is controlled below 450 ×10^-6 at the end of decarbenization in RH. With the optimization process, the mass fraction of T. Fe in slag is decreased from 10 % - 25 % to less than 15 % at the beginning of RH, which is also decreased from 2 % - 12 % to below 3 % at the end of RH, and the slag basicity is controlled above 3.0 during RH treatment process. T. O mass fraction at the end of RH is reduced from （15 - 30） ×10^-6 to below 15 ×10^-6 using the optimization process, which indicated that the cleanliness of molten is significantly improved.

关 键 词：铝镇静硅钢 全氧含量 炉渣改质 二次氧化 

分 类 号：TF703.6[冶金工程—钢铁冶金]