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 ›› 2011, Vol. 32 ›› Issue (3): 48-50.

• 工艺技术 • 上一篇    下一篇

VOD底吹氮精炼高氮钢P91的工艺实践

郭 畅 ,吕文俊,周立新,张志成,余亚平,柯林   

  1. 湖北新冶钢有限公司,黄石435001
  • 收稿日期:2011-01-06 出版日期:2011-06-01 发布日期:2022-10-18
  • 作者简介:郭畅( 1987-),男,2009年武汉科技大学毕业,电弧炉冶炼和二次精炼技术研究。

Practice of Process for VOD Nitrogen Bottom-Blown Refining High Nitrogen Steel P91

Guo Chang, Lil Wenjun, Zhou Lixin, Zhang Zhicheng, Yu Yaping , Ke Lin   

  1. Hubei Xinyegang Co Ltd, Huangshi 435001
  • Received:2011-01-06 Published:2011-06-01 Online:2022-10-18

摘要: 锅炉用铁素体耐热钢P91(%:0.08~0.12C、8.0~9.5Cr、0.85~1.05Mo、0.18~0.25V、0.06~0.10Nb、0.030~0.070N)的冶炼工艺流程为20 t EBT EAF+10 t感应炉混炼-LF-VOD(吹氮)-3 t锭模铸。通过低真空(~26 000 Pa)底吹N气搅拌使脱氧剂、造渣材料充分快速与钢液反应,使[N]从(80~90)×10-6增至(120~140)×10-6,然后底吹氮以(9~15)×10-6/min的增氮速率将[N]增至620×10-6,钢材中的N含量约为500×10-6,达到标准要求。

关键词: 高氮钢P91 , VOD, 底吹氮精炼

Abstract: The steelmaking process flow sheet of ferrite heat resisting steel P91 for boiler (% ; 0. 08 ~0. 12C, 8. 0 ~ 9. 5Cr, 0. 85 ~ 1. 05Mo, 0. 18 ~0. 25V, 0. 06 〜0. 10Nb, 0. 030 ~0. 070N) is 20 t EBT EAF + 10 t induction furnace mixing melting- LF-VOD (nitrogen blowing) - 3 t ingot mold casting. With bottom blowing nitrogen gas stirring in low vacuum (~ 26 000 Pa) to make sufficient and quick reaction between deoxidizer, slag-making materials and liquid, the [ N ] increases from (80 ~ 90) x 10-6 to ( 120 〜140) x 10-6 , then by nitrogen bottom-blowing with (9 ~ 15) x 10-6/min increasing rate of N content in liquid, the [ N] shall increases to 620 x 10-6, and the nitrogen content in steel products is about 500 x 10-6 to meet the requirement of standard.