不同RH冶炼工艺对低碳铝镇静钢洁净度的影响  

Comparison of cleanliness of low carbon aluminum killed steel with different RH refining process

作　　者：苏笃星 马建超[1] 张志平[2] 

机构地区：[1]江苏沙钢集团有限公司江苏省(沙钢)钢铁研究院,江苏张家港215625 [2]江苏沙钢集团有限公司宏发炼钢厂,江苏张家港215625

出　　处：《炼钢》2015年第2期36-39,53,共5页Steelmaking

摘　　要：对比分析了生产低碳铝镇静钢采用RH两种不同处理模式的工艺特点和洁净度差异，结果表明：工艺路线1的RH到站渣中w（T．Fe＋MnO）：5％～12％，而工艺路线2的RH到站渣中w（T．Fe＋MnO）稳定控制在2％以内，工艺路线1精炼过程中w（Al5）损失较工艺路线2高约54×10^-6；工艺2夹杂物有效去除时间平均为64min高于工艺路线1的45min工艺路线1结晶器钢水w（T．O）较工艺路线2高13×10^-6工艺路线1结晶器钢液中的夹杂物分布面积比高于工艺路线2，同时工艺路线1钢水样中，尺寸在5“m以上的夹杂物占10．6％，高于工艺路线2的3．6％。针对不同RH精炼工艺分别提出了相应的优化措施。The process characteristics and steel cleanness of low-carbon aluminum killed steel under different RH process routes were discussed. The results showed that： the w（T. Fe＋ MnO） of route 1 was 5%-12 %, while route 2 was under 2%, besides the lost of acid-soluble aluminium for route 1 was 54 ×10^-6 more than route 2. Effective re- moval time of inclusion under route 2 was 64 rain more than 45 rain of route 1, and the total oxygen at mold through process route 1 was 13 ×10^-6 higher than that of route 2. The total inclusion ratio of route 1 was higher than that of the route 2, and for rout 1, it has 10. 6% of the inclusions bigger than 5μm,while only 3.6 % for route 2. The opti- mization measures were put forward respectively according to the different RH refining process.

关 键 词：低碳铝镇静钢 RH精炼 夹杂物 

分 类 号：TF769.4[冶金工程—钢铁冶金]