100t RH顶吹氧去除真空室内壁冷钢的数值模拟和应用

Numerical Simulation of Removal of Cold Steel in Inner Wall of Vacuum Chamber of 100 t RH Unit by Top Oxygen-Lance Blowing and Application

对钢厂100 t RH将原天然气烘烤改为顶吹氧去除真空室内壁冷钢工艺改造进行了研究。对5.5~7.5 m氧枪位置及750~1300 m^3/h氧气流量下的速度场进行了数值模拟,根据计算确定了在枪位为5.5~6.5 m,氧气流量为900~1 200 m^3/h时RH顶吹氧去除冷钢是可行的。工业生产应用结果表明,采用该顶吹氧去除冷钢工艺,明显提高了RH的连续处理能力,RH月处理能力由不到28.5%提高到36.0%左右,单月RH处理能力最高比例达到48.8%。

The technology revamping of removing the cold steel in inner wall of vacuum chamber of 100 t RH unit at steel by top oxygen blowing process to replace original nature gas baking process has been studied. The numerical simulation on velocity field with oxygen lance level 5.5 ~ 7. 5 m and oxygen flow rate 750 - 1 300 m3/h is carried out and based on cal- culation it is defined that the RH top oxygen blowing with lance level 5.5- 6. 5 m and oxygen flow rate 900 - 1 200 m3/h to remove the cold steel is available. Commercial production application results show that the RH continuous processing capacity significantly increases by the top oxygen blowing to remove cold steel process, the RH monthly processing capacity increases from original less than 28. 5% to about 36. 0%, and the highest RH processing percentage of single month is up to 48. 8%.