Evolution of Inclusions in Steel with 150 t LF Refining Feeding Calcium Wire Treatment

姜玉龙; 郑万; 齐盼盼; 李天佑; 王春锋; 刘炳宇; 李光强

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Evolution of Inclusions in Steel with 150 t LF Refining Feeding Calcium Wire Treatment

更新时间：2026-01-21

- Evolution of Inclusions in Steel with 150 t LF Refining Feeding Calcium Wire Treatment
- Special Steel Vol. 37, Issue 3, Pages: 8-12(2016)
- 作者机构：
  
  1. 武汉科技大学1省部共建耐火材料与冶金国家重点实验室
  2. 钢铁冶金及资源利用省部共建教育部,重点实验室,武汉,430081
  3. 武汉钢铁股份有限公司,武汉,430083
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：30 December 2015，
  
  Online First：02 August 2022，
  
  Published：02 August 2016
- 稿件说明：
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姜玉龙, 郑万, 齐盼盼, et al. Evolution of Inclusions in Steel with 150 t LF Refining Feeding Calcium Wire Treatment[J]. Special Steel, 2016, 37(3): 8-12.
DOI：

姜玉龙, 郑万, 齐盼盼, et al. Evolution of Inclusions in Steel with 150 t LF Refining Feeding Calcium Wire Treatment[J]. Special Steel, 2016, 37(3): 8-12. DOI：

摘要

通过热力学计算和扫描电镜研究了铁水预处理-150 t BOF-钢包吹氩-LF-CSP流程LF精炼后喂硅钙线和钙铝线处理的Q235

SPA-H和DC01钢中夹杂物演变及精炼渣对其影响。结果表明

Ca处理前的精炼过程中

钢中Al

大部分已经被精炼渣（/%:52.97~55.63CaO

4.11~12.78SiO

5.11~9.87MgO

22.93~31.72Al

0.58~1.27FeO

0.01~0.07MnO）改性为MgO·Al

根据Mg-Al-O生成优势区图

钢中有微量Mg就能使Al

变性为MgO·Al

尖晶石

钙处理主要是对MgO·Al

尖晶石的变性

因此需要保证充足的钙线喂入量

才能将高熔点铝镁和铝镁钙复合夹杂物变性到低熔点区域;为了避免生成高熔点CaS夹杂物

钙处理前[Al

]

=0.02%~0.04%时

]

要小于0.001 4%。

Abstract

The evolution of inclusions in steel Q235

SPA-H and DC01 treated by feeding silicon-calcium wire and calcium-aluminium wire after LF refining in metal pretreatment-150 t BOF-ladle argon blowing-LF-CSP flowsheet and the effect of refining slag on inclusions are studied by thermodynamic calculation and scanning electron microscope. The results show that during refining process before Ca treatment the greater part of Al

in steel is modified to MgO·Al

by refining slag (/%： 52.97 ~55.63CaO

4.11 ~12.78SiO2

5.11~9.87MgO

22.93 ~31.72Al

0. 58 ~1.27FeO

0. 01 ~0. 07MnO) ; based on

the Mg-Al-O predominant forming diagram

with micro-amount Mg in steel the Al

may modify to MgO· Al

spinel

the calcium treatment is mainly to modify the MgO· Al

spinel

therefore it is need to feeding sufficient amount of calcium for high melting point aluminium-magnesium and aluminium-magnesium-calcium inclusion modifying to low melting point region; in order to avoid forming high melting point CaS inclusions

before calcium treatment with [Al

]

=0. 02% ~0. 04% the [S

]

should be less than 0.001 4%.

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