Examination and Study on Cleanliness of 0.6 % C Steel  Steelmaking by 120 t BOF-LF-CC Process

孙乐飞; 吴义超; 王学林; 操瑞宏; 傅清霞; 万勇

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Examination and Study on Cleanliness of 0.6 % C Steel Steelmaking by 120 t BOF-LF-CC Process

更新时间：2026-01-21

- Examination and Study on Cleanliness of 0.6 % C Steel Steelmaking by 120 t BOF-LF-CC Process
- Special Steel Vol. 40, Issue 3, Pages: 13-18(2019)
- 作者机构：
  
  1. 新余钢铁股份有限公司,新余,338001
  2. 安徴工业大学冶金工程学院,马鞍山,243032
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：28 December 2018，
  
  Online First：16 May 2022，
  
  Published：16 May 2019
- 稿件说明：
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孙乐飞, 吴义超, 王学林, et al. Examination and Study on Cleanliness of 0.6 % C Steel Steelmaking by 120 t BOF-LF-CC Process[J]. Special Steel, 2019, 40(3): 13-18.
DOI：

孙乐飞, 吴义超, 王学林, et al. Examination and Study on Cleanliness of 0.6 % C Steel Steelmaking by 120 t BOF-LF-CC Process[J]. Special Steel, 2019, 40(3): 13-18. DOI：

摘要

通过LF精炼和连铸过程钢水和炉渣取样

对3炉60钢冶炼各个阶段的T[O

]

显微夹杂物的数量、尺寸及类型的变化进行了系统研究。结果表明

在LF进站时

3炉60钢中T[O

]

为0.007 0%左右;从LF进站→钙处理后→软吹结束→中间包浇注→铸坯

3炉60钢中T[O

]

总体呈现缓慢降低的趋势

其铸坯中T[O

]

降到0.003%以下。LF进站时

3炉60钢中夹杂物以硅锰脱氧产物SiO

-Mn0-（Al

）复合夹杂为主;经钙处理后

其钢中夹杂物转变为CaO-SiO

-Al

-Mg0系复合夹杂

该复合夹杂物的主要成分为CaO+MgO 20%～40%

SiO

20%～40%

30%-50%。由于中间包浇注过程钢液存在明显二次氧化

导致60钢中间包内钢水T[O

]

和二次氧化产物SiO

-MnO-（Al

）夹杂数量明显增加。

Abstract

The variations of the total oxygen content

the amount

size and morphology of inclusions in three heats 0. 6% C steels were studied systematically by sampling of molten steel and slag during LF refining and continuous casting. The results show that the total oxygen content of three heats 0. 6% C steel is about 0.007 0% in start of LF refining

the total oxygen content of three heats 0.6% C steel is reduced slowly and the total oxygen content in the casting blank is reduced to less than 0. 003% during start of LF refining→ after calcium treatment→end of soft argon stirring→ tundish casting→ casting slab. In start of LF refining

the inclusions of three heats 0. 6% C

steel are mainly SiO

-MnO-(Al

) inclusions

which are the deoxidized products of silicon and manganese. After calcium treatment

the inclusions in the steel are transformed into CaO-SiO2 -Al

-MgO whose main components are CaO + MgO 20% ~40%

SiO2 20% ~40%

30% ~50%. Due to the secondary oxidation of molten steel during tundish pouring

the total oxygen content of molten steel and the a¬mount of SiO

-MnO-( Al

) of the secondary oxidation products in 0. 6% C steel tundish have increased significantly.

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