Analysis on Slagging Schedule in 100 t LF Refining of Cold Heading Steel SWRCH22A and Process Optimization

高长益; 张毅; 谢祥; 王琳松; 郑家良; 王谦

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Analysis on Slagging Schedule in 100 t LF Refining of Cold Heading Steel SWRCH22A and Process Optimization

更新时间：2026-01-21

- Analysis on Slagging Schedule in 100 t LF Refining of Cold Heading Steel SWRCH22A and Process Optimization
- Special Steel Vol. 37, Issue 3, Pages: 35-38(2016)
- 作者机构：
  
  1. 水城钢铁集团公司1技术中心
  2. 炼钢厂,六盘水,553028
  3. 水城钢铁集团公司,六盘水,553028
  4. 重庆大学材料科学与工程学院,重庆,400044
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：28 December 2015，
  
  Online First：02 August 2022，
  
  Published：02 August 2016
- 稿件说明：
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高长益, 张毅, 谢祥, et al. Analysis on Slagging Schedule in 100 t LF Refining of Cold Heading Steel SWRCH22A and Process Optimization[J]. Special Steel, 2016, 37(3): 35-38.
DOI：

高长益, 张毅, 谢祥, et al. Analysis on Slagging Schedule in 100 t LF Refining of Cold Heading Steel SWRCH22A and Process Optimization[J]. Special Steel, 2016, 37(3): 35-38. DOI：

摘要

为减少钢中夹杂物和对夹杂物变性处理

防止连铸水口结瘤

对100 t LF 5炉SWRCH22A冷镦钢（/%:0.18~0.20C，0.44~0.62Si，0.85~0.89Mn，0.012~0.015P，0.006~0.009S，0~0.004Ca，0.000 7~0.0010B，0.011~0.088Als）夹杂物钙处理进行了Ca-Al

Al-O

Al-S

Ca-S平衡热力学计算和氧氮分析。得出1 873 K[Ca

]

-[Al

]

a[O

]

-[Al

]

和[S

]

-[Al

]

平衡曲线

1 823~1 923 K[Ca

]

-[S

]

平衡曲线

和5炉钢对应的实测值。通过分析

得出优化LF精炼工艺:（1）精炼终渣MgO=6%、SiO

6%、CaO/Al

=1.6~1.8;（2）转炉下渣量700 kg左右

精炼终渣量2 000 kg左右;（3）根据精炼终渣CaO/Al2O3=1.6~1.8的目标来决定造渣料的加入量;（4）避免喂钙线时钢水剧烈翻腾

并防止精炼结束到中间包过程钢水的氧化

Abstract

In order to reduce inclusions in steel and modify inclusions to prevent nozzle clogging during casting process

the equilibrium theimodynamic calculations of Ca-Al

Al-O

Al-S and Ca-S

and the analysis of oxygen and nitrogen of 5 heats 100 t LF of cold heading steel SWRCH22A (/% ： 0.18 ~0. 20C

0. 44 ~0. 62Si

0. 85 ~0. 89 Mn

0.012 ~ 0. 015P

0. 006 ~ 0. 009S

0 ~ 0. 004Ca

0.000 7 -0.001 0B

0. 011 ~ 0. 088Als) by calcium treatment on inclusions in steel have been carried out. The equilibrium curves of [Ca

]

-[Al

]

a[O

]

-[Al

]

and [S

]

-[Al

]

at 1 873 K and [ Ca

]

-[ S

]

at 1 823 ~ 1 923 K are obtained and compared to corresponding measured data of 5 heats. By analysis the op

timized LF refining process: (1) end refining slag- MgO = 6%

SiO

6% and CaO/Al

=1.6 ~1.8; (2) amount of BOF tapping slagging being about 700kg

amount of end refining slag being about 2 000 kg; (3) according to the aim end refining slag with CaO/Al

= 1. 6 ~ 1. 8 to define the amount of charging slag materials; and (4) avoiding the boiling of liquid steel during feeding calcium wire process and the oxidation of liquid during process of end refining to tundish.

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