Process for Production of Ultra-Low Sulphur Steel by BOF Tapping Desulphurizing-LF Refining

郝宁; 王新华; 王海涛; 李宏; 崔爱民; 王国连; 龚坚; 李林

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Process for Production of Ultra-Low Sulphur Steel by BOF Tapping Desulphurizing-LF Refining

更新时间：2026-01-21

- Process for Production of Ultra-Low Sulphur Steel by BOF Tapping Desulphurizing-LF Refining
- Special Steel Vol. 27, Issue 6, Pages: 44-46(2006)
- 作者机构：
  
  1. 北京科技大学冶金与生态工程学院,北京,100083
  2. 首钢集团总公司,北京,100041
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：01 June 2006，
  
  Online First：02 March 2023，
  
  Published：02 March 2006
- 稿件说明：
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郝宁, 王新华, 王海涛, et al. Process for Production of Ultra-Low Sulphur Steel by BOF Tapping Desulphurizing-LF Refining[J]. Special Steel, 2006, 27(6): 44-46.
DOI：

郝宁, 王新华, 王海涛, et al. Process for Production of Ultra-Low Sulphur Steel by BOF Tapping Desulphurizing-LF Refining[J]. Special Steel, 2006, 27(6): 44-46. DOI：

摘要

因210tBOF冶炼终点NVA32(%:0.12～0.18C、1.30～1.60Mn)钢中硫含量由0.005%升高至0.020%

通过BOF出钢过程加入1000kg二元合成渣CaO-CaF

、200kg铝粒

并加入硅锰和硅铝钡合金

可使钢中硫含量降低0.007%～0.008%

脱硫率达30%。在LF精炼时

通过进一步加入合成渣800kg

600～900L/min吹氩

加热后喂600m硅钙线

30～45L/min吹氩10min

终渣碱度R=4.5～5.5

钢中硫含量进一步降低至0.001%～0.002%。

Abstract

Because the sulphur content in steel NVA32(0. 12~0. 18C

1.30～1.60Mn)increases to 0.020% at 210 t BOF melting end point from original 0.005%

it shall be added 1000 kg binary synthetic slag CaO-CaF₂ and added 200 kg aluminium during BOF tapping and added Si-Mn alloy and Si-Al-Ba alloy to decrease sulphur content in steel by 0.007%～0.008% with desulphurization rate up to 30%.During LF refining

sulphur content in steel further decreases to 0.001%～0.002% by further added 800 kg synthetic slag

blown argon 600~900 L/min

after heating fed 600 m silicon- calcium wire then blown argon 30~45 L/min for 10 min with end slag basicity R = 4.5～5.5.

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