Optimization of 180 t LF Deep Desulphurization Refining Process for Pipeline Steel X70

邹长东; 赵家七; 周彦召; 耿涛; 丁振涛

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Optimization of 180 t LF Deep Desulphurization Refining Process for Pipeline Steel X70

更新时间：2026-01-21

- Optimization of 180 t LF Deep Desulphurization Refining Process for Pipeline Steel X70
- Special Steel Vol. 34, Issue 5, Pages: 47-50(2013)
- 作者机构：
  
  1. 江苏省沙钢 1 钢铁研究院
  2. 宏发炼钢厂,张家港,215625
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：24 April 2013，
  
  Online First：22 September 2022，
  
  Published：22 September 2013
- 稿件说明：
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邹长东, 赵家七, 周彦召, et al. Optimization of 180 t LF Deep Desulphurization Refining Process for Pipeline Steel X70[J]. Special Steel, 2013, 34(5): 47-50.
DOI：

邹长东, 赵家七, 周彦召, et al. Optimization of 180 t LF Deep Desulphurization Refining Process for Pipeline Steel X70[J]. Special Steel, 2013, 34(5): 47-50. DOI：

摘要

X70管线钢的生产流程为KR铁水预脱硫-180 t BOF-LF-RH-板坯连铸工艺。通过优化精炼渣成分和造渣制度

以及根据底吹流量(400-700 L/min)对终点[S

]

的影响

制定了LF深脱硫工艺。生产试验结果表明

通过控制精炼渣成分(/%)45~55CaO、30~40Al

、≤10SiO

、≤10MgO、≤1.5(TFe+MnO)

造渣时分两批(首次出钢过程第二批LF到站加入)或多批加入石灰

精炼过程根据炉渣情况适当调渣

LF精炼脱硫期的底吹气体流量为500~700 L/min

可在40 min内将钢液[S

]

降低到10×10

-6

以下

满足了管线钢快速深脱硫的需求。

Abstract

The production flow sheet for pipeline steel X70 is KR metal pre-desulphuration-180 t BOF-LF-RH-slab CC process. With optimization of refining slag ingredient and slagging operation

and based on effect of bottom gas blowing rate (400-700 L/min) on end [S

]

the LF deep desulphurization process has been schemed. Pilot production results show that by controlling refining slag ingredient (/% ) 45-55CaO

30-40Al

≤10SiO

≤10Mgo

≤1.5(TFe + MnO)

with the technology measures including during slagging the lime being added in two separate batch (first in tapping

second at beginning of LF refining) or being added in multi-batch

during LF refining according to slag condition adjusting ingredient of slag

and bottom gas blowing rate 500-700 L/min during LF desulphurization period

the sulphur content in liquid-

]

could be decreased to lower than 10 x 10

-6

in 40 min to meet the requirement of quick deep desulphurization for pipeline steel.

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