RH真空深脱碳工艺的优化  

Decarburization process optimization of 180 t RH vacuum degasser

作　　者：周彦召 邹长东 赵家七 皇祝平 

机构地区：[1]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》2014年第3期24-27,32,共5页Steelmaking

摘　　要：通过对RH到站钢液的初始条件、吹氧时机、真空室抽气制度和提升气体模式等的优化,开发了180 t RH真空炉的快速高效脱碳工艺。控制RH到站w（C）=（250~500）×10-6,w（O）=（300~650）×10-6;适当快速降低真空室压力低于150 Pa;RH到站时w（C）/w（O）〉0.66时,在脱碳前期进行强制吹氧脱碳;提升气体使用模式为1.0G m3/h（0~4 min）,0.8G m3/h（4~6 min）,1.0G m3/h（6 min以后）。工业试验结果表明：运用新工艺,脱碳处理15 min后,大部分炉次钢包内钢液的w（C）〈15×10-6。Optimizations of initial carbon and oxygen condition,blowing oxygen time,exhausting system,and liftgas flowrate pattern were conducted to develop an effective decarburization process for 180t RH degasser.The initial carbon mass fraction was kept between（250-500）×10-6,and oxygen mass fraction between（300-650）×10-6;the pressure in the vacuum chamber quickly decreased to less than 150 Pa;when the initial condition w（C）/w（O）0.66,oxygen was blew to force decar-burization at eaaly;the lift gas was 1.0G m3/h（0-4 min）,0.8G m3/h（4-6 min）,1.0G m3/h（after 6 min）.With the new process large-scale industrial production results indicated that a majority of final mass fraction of carbon could be reach to less than 15×10-6 in 15 min.

关 键 词：RH 脱碳 脱碳速率 优化 

分 类 号：TF769.4[冶金工程—钢铁冶金]