ISSN:1003-8620

CN:42-1243/TF

主管:中信泰富特钢集团股份有限公司

主办:大冶特殊钢有限公司

特殊钢 ›› 2009, Vol. 30 ›› Issue (6): 26-28.

• 工艺技术 • 上一篇    下一篇

100 t BOF-LF-RH-CC工艺冶炼结构钢时钢中氮的行为及控制

陆锦祥1,王忠英1,陈水盛1,薛正良2,柯超2   

  1. 1江苏沙钢集团淮钢特钢有限公司,淮安223002;
    2武汉科技大学钢铁冶金及资源利用省部共建教育部重点实验室,武汉430081
  • 收稿日期:2009-06-09 出版日期:2009-12-01 发布日期:2022-11-15
  • 作者简介:陆锦祥(1950-),男,高级经济师,1986年苏州经济管理学 院毕业,特殊钢生产技术管理。

Behavior and Control of Nitrogen in Structural Steels Steelmaking by 100 t BOF-LF-RH-CC Process

Lu Jinxiang1 , Wang Zhongying1, Chen Shuisheng1 , Xue Zhengliang2 , Ke Chao2   

  1. 1 Huaigang Special Steel Co Ltd, Jiangsu Shagang Group, Huai'an 223002;
    2 Key Lab for Ferrous Metallurgy and Resources Utilization of Ministiy of Education, Wuhan University of Science and Technology, Wuhan 430081
  • Received:2009-06-09 Published:2009-12-01 Online:2022-11-15

摘要: 通过对淮钢100 t BOF-LF-RH-CC工艺流程冶炼45钢和42CrMo钢时各工序钢水取样分析氮含量,研究各工序对钢水中氮含量的影响。得出除吹氩和RH工序外,各工序都存在增氮现象:钢包至中间包长水口增氮占增氮总量的40%,LF精炼增氮占35%,出钢增氮占20%。所以控制转炉终点氮含量,控制LF渣层厚度,避免LF精炼补加合金和增碳,适当延长RH处理时间,提高长水口氩封效果是控制钢水氮含量的关键措施。

关键词: BOF-LF-RH-CC 工艺, 结构钢, 氮含量

Abstract: Effect of each steelmaking stage on nitrogen content in liquid 0. 45C steel and 42CrMo steel is studied by analysis on nitrogen in sampling liquid steels at each stage of 100 t BOF-LF-RH-CC flow sheet at Huaigang Special Steel. It is obtained that there are nitrogen pick up at each stage except argon blowing and RH stage: the nitrogen pick up at long nozzle between ladle and tundish makes up 40% of the total nitrogen pick up value, that at LF refining stage makes up 35% and at BOF tapping stage makes up 20%. Therefore the key operation measures for control of nitrogen content in liquid steel are to control BOF end point nitrogen content in liquid, control LF slag layer thickness, avoid adding alloy and recarburization practice in LF refining, suitably prolong RH treatment time and increase long nozzle argon sealing effect.

Key words: BOF-LF-RH-CC Process, Structure Steels, Nitrogen Content