炼钢

• 生产实践 • 上一篇    下一篇

RH真空深脱碳工艺的优化

  

  1. 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
  • 接受日期:1900-01-01 出版日期:2014-06-05

Decarburization process optimization of 180 t RH vacuum degasser

  • Accepted:1900-01-01 Online:2014-06-05

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[JP2]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)×10-6w(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

关键词: RH, 脱碳, 脱碳速率, 优化

Abstract: 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 180 t 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.

Key words: RH, decarburization, decarburization rate, optimization