炼钢

• 试验研究 • 上一篇    下一篇

承钢120 t LF底吹流场优化研究

  

  1. (1.北京科技大学 冶金与生态工程学院,北京 100083;2.河北钢铁集团承德钢铁集团有限公司,河北 承德 067002)
  • 接受日期:1900-01-01 出版日期:2014-10-05

Study of bottom-blowing process of Cheng-Steel 120 t ladle funace

  • Accepted:1900-01-01 Online:2014-10-05

摘要: 结合前期水模拟结果,利用FLUENT软件对河北承钢炼钢二厂120 t LF进行了底吹氩气的三相流数值模拟,模拟结果表明:优化后钢包熔池速度与湍动能分别增大了11.8 %和 18.3 %,死区体积减小了33.7 %,有利于钢包内熔池的传热、传质以及夹杂物去除等过程。将优化后钢包底吹位置应用于河北钢铁集团承德钢铁集团有限公司炼钢二厂120 t LF,结果表明:T.O去除率提高了5.9 %,w(N)降低了6.4 %;总夹杂物去除率提高了5.5 %;大型夹杂物去除率提高4.9%。达到改善钢包结构,优化钢液流动状态,提高LF的精炼的目的。

关键词: 钢包, 多项流, 数值模拟, 夹杂物

Abstract: Base on water simulation results, three-dimensional mathematical model for a 120 t ladle furnace of Chengde Iron and Steel Company, Hebei Iron and Steel Co., Ltd., had been built in present work. The simulation results showed that velocity and turbulent kinetic energy of bath increased by 11.8 % and 18.3 %, with the dead region decreased by 33.7 %,which was good at heat transfer, mass transfer and inclusion removal. To test the simulation results, the position of the bottom blown nozzles applied to 120 t ladle furnace of Chengde Iron and Steel Company. The results showed that the total oxygen removal rate was improved by 5.9 %, and the nitrogen content was reduced by 6.4 %. The rate of inclusions removal was improved by 5.5 %, and the rate of large-sized inclusion removal improved by 4.9 %, which achieved the purpose of flow field optimization of 120 t ladle furnace.

Key words: ladle furnace, multi-phase, numerical simulation, inclusion