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

郭畅; 吕文俊; 周立新; 张志成; 余亚平; 柯林

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

更新时间：2026-01-21

- Practice of Process for VOD Nitrogen Bottom-Blown Refining High Nitrogen Steel P91
- Special Steel Vol. 32, Issue 3, Pages: 48-50(2011)
- 作者机构：
  
  湖北新冶钢有限公司,黄石,435001
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：06 January 2011，
  
  Online First：18 October 2022，
  
  Published：18 October 2011
- 稿件说明：
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郭畅, 吕文俊, 周立新, et al. Practice of Process for VOD Nitrogen Bottom-Blown Refining High Nitrogen Steel P91[J]. Special Steel, 2011, 32(3): 48-50.
DOI：

郭畅, 吕文俊, 周立新, et al. Practice of Process for VOD Nitrogen Bottom-Blown Refining High Nitrogen Steel P91[J]. Special Steel, 2011, 32(3): 48-50. DOI：

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。

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.

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