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

陆锦祥; 王忠英; 陈水盛; 薛正良; 柯超

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

更新时间：2026-01-21

- Behavior and Control of Nitrogen in Structural Steels Steelmaking by 100 t BOF-LF-RH-CC Process
- Special Steel Vol. 30, Issue 6, Pages: 26-28(2009)
- 作者机构：
  
  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
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：09 June 2009，
  
  Online First：15 November 2022，
  
  Published：15 November 2009
- 稿件说明：
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陆锦祥, 王忠英, 陈水盛, et al. Behavior and Control of Nitrogen in Structural Steels Steelmaking by 100 t BOF-LF-RH-CC Process[J]. Special Steel, 2009, 30(6): 26-28.
DOI：

陆锦祥, 王忠英, 陈水盛, et al. Behavior and Control of Nitrogen in Structural Steels Steelmaking by 100 t BOF-LF-RH-CC Process[J]. Special Steel, 2009, 30(6): 26-28. DOI：

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。

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.

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