100t RH顶吹氧去除真空室内壁冷钢的数值模拟和应用
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摘要
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 m~3/h is carried out and based on calculation it is defined that the RH top oxygen blowing with lance level 5. 5~6. 5 m and oxygen flow rate 900~1 200 m~3/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%.
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 m~3/h is carried out and based on calculation it is defined that the RH top oxygen blowing with lance level 5. 5~6. 5 m and oxygen flow rate 900~1 200 m~3/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%.
引文
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[3]李大明,张文辉,林立平.RH顶吹氧技术在武钢第二炼钢厂的应用[J].炼钢,2007,23(6):5-9.
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[5]屠浩.RH真空精炼喷吹工艺参数优化的物理模型研究[D].武汉:武汉科技大学冶金工程,2015:27-28.
[2]单庆林,王雷川,彭国仲.RH真空槽结冷钢和结渣形成的原因及解决措施[J].首钢科技,2016(1):17-19.
[3]李大明,张文辉,林立平.RH顶吹氧技术在武钢第二炼钢厂的应用[J].炼钢,2007,23(6):5-9.
[4]张鉴.炉外精炼的理论与实践[M].北京:冶金工业出版社,1993:541-548.
[5]屠浩.RH真空精炼喷吹工艺参数优化的物理模型研究[D].武汉:武汉科技大学冶金工程,2015:27-28.