RH-LF和LF-VD工艺生产管线钢洁净度的比较

特殊钢 ›› 2009, Vol. 30 ›› Issue (2): 52-54.

RH-LF和LF-VD工艺生产管线钢洁净度的比较

余健¹，李晶¹，田伟¹，姚永宽²，耿建林²，尹雨群²，谯明亮²

1. 北京科技大学冶金与生态工程学院，北京 100083;
2. 南京钢铁集团股份有限公司，南京 210035;

收稿日期:2008-09-16 出版日期:2009-04-01 发布日期:2022-12-05
作者简介:余健(1981-)，男，博士生，洁净管线钢研究。

Comparison of Cleanliness of Pipeline Steel Refining by RH-LF and LF-VD Process

Yu Jian¹ , Li Jing¹ , Tian Wei¹ , Yao Yongkuan² , Geng Jianlin² , Yin Yuqun² , Qiao Mingliang²

1. School of Metallurgical and Ecological Engineering,University of Science and Technology,Beijing 100083;
2. Nanjing Iron and Steel Co.Ltd.,210035;

Received:2008-09-16 Published:2009-04-01 Online:2022-12-05

摘要/Abstract

摘要： 比较了铁水预处理-150 t顶底复吹转炉钢水经RH-LF和LF-VD两种精炼工艺生产的管线钢(≤0.04%C-1.55%～1.78%Mn)洁净度。结果表明,RH-LF和LF-VD精炼均能使管线钢氮含量降至(30～40)×10^-6,氧含量≤10×10^-6,硫含量≤0.002 0%;LF-VD精炼渣碱度高于RH-LF精炼渣,LF-VD精炼钢平均磷含量为0.0090%,比RH-LF精炼钢低0.001 0%;两种精炼钢中主要夹杂物为钙铝酸盐和钙铝酸盐-二氧化硅复合夹杂, LF-VD精炼钢大部分夹杂物尺寸为5～10μm,RH-LF精炼钢大部分夹杂物尺寸为5～20μm。

关键词: RH, VD, LF, 管线钢, 洁净度

Abstract: Cleanliness of pipeline steel(≤0.04%C-1.559%~1.78%Mn)produced by two refining processes-RH-LF and LF-VD with liquid steel melting by hot metal pretreatment- 150 t top and bottom blown converter process has been compared. Results showed that after RH-LF or LF-VD refining,the nitrogen content in pipeline decreased to (30～40) x 10^-6,the oxygen content was ≤ 10×10^-6 and the sulphur content was ≤0.0020%;as the basicity of refining slag for LF-VD process was higher than that for RH-LF process,the average phosphorus content in LF-VD refined steel was 0.0090% which was lower by 0.0010% as compared with that in RH-LFrefined steel; the main inclusions in both refining steel were calciun-aluminates inclusion and calcium-aluminate silicon-dioxide compound inclusion; and the size of most inclusions in steel refining by LF-VD was 5~10 μm while that by RH-LF was 5～20 μm.

Key words: RH, VD, LF, Pipeline Steel, Cleanliness

余健, 李晶, 田伟, 姚永宽, 耿建林, 尹雨群, 谯明亮. RH-LF和LF-VD工艺生产管线钢洁净度的比较[J]. 特殊钢, 2009, 30(2): 52-54.

Yu Jian , Li Jing , Tian Wei , Yao Yongkuan , Geng Jianlin , Yin Yuqun , Qiao Mingliang. Comparison of Cleanliness of Pipeline Steel Refining by RH-LF and LF-VD Process[J]. Special Steel, 2009, 30(2): 52-54.

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