RH-KTB深脱氮工艺试验研究  

Investigation of Deep Denitrogenation During RH-KTB

作　　者：章奉山[1] 朱万军[1] 刘振清[2] 吴杰[2] 徐静波[2] 

机构地区：[1]武汉科技大学材料与冶金学院,湖北武汉430081 [2]武汉钢铁集团公司第二炼钢厂,湖北武汉430083

出　　处：《钢铁》2006年第4期30-32,共3页Iron and Steel

摘　　要：武钢第二炼钢厂使用RH-KTB设备主要生产ω（C）很低（ω（C）≤15×10^-6）的冷轧薄板钢.为了同时把有害元素ω（N）降至15×10^-6以下,进行了125炉次的深脱氮工艺试验.试验结果表明,RH-KTB法可以同时深脱氮,平均初始ω（N）为24×10^-6,经过约25 min精炼,最终钢液中ω（N）可以稳定控制在15×10^-6以下,成功率达80%.同时发现,脱氮反应主要发生在吹氧快速脱碳阶段,脱氮随着脱碳速率增大而加快,6～8 min脱碳减弱后,靠提高真空度、增大吹氩量和循环量等措施,还能继续深脱氮,可以脱去脱氧合金化时合金带入的增氮量.The ultra-low carbon（ω（C）≤15× 10 ^-6 ） cold rolled strip is mainly produced with RH KTB in No. 2 Steel making Plant of Wuhan Steel. The deep denitrogenation experiments of 125 heats were carried out to reduce the nitrogen content below 15× 10^- 6 during decarbonization process. The test results show that the average nitrogen con tent at the end point can be stably reduced to less than 15 × 10^-6 from 24× 10^-6 after 25 minutes refining with 80% probability. It was also found that denitrogenation is mainly occurred during oxygen injection and quick decarbonization process. Denitrogenation is accelerated with increased decarbonization. Decarbonization is reduced after 6-8 min from the start, but deep denitrogenation can be reached by reducing the pressure, increasing argon flow rate and circulation rate of molten steel. At least the nitrogen pickup by adding ferroalloys can be compensated.

关 键 词：RH-KTB 深脱氮 工艺 

分 类 号：TF769.4[冶金工程—钢铁冶金]