酸溶铝含量对硅镇静钢夹杂物特征及水口堵塞的影响

特殊钢 ›› 2014, Vol. 35 ›› Issue (1): 36-39.

酸溶铝含量对硅镇静钢夹杂物特征及水口堵塞的影响

郑万¹，沈星¹，李光强¹，朱诚意¹，吴振华¹，屠浩¹，卢凯²

1武汉科技大学钢铁冶金及资源利用省部共建教育部重点实验室，武汉430081；
2武汉钢铁股份有限公司炼钢总厂，武汉430083

收稿日期:2013-08-28 出版日期:2014-02-01 发布日期:2022-09-06
作者简介:郑万(1965.-),男，教授，二次精炼、连铸技术研究。
基金资助:
国家自然科学基金青年基金(51104109)
湖北省自然科学基金创新群体项目(2008CDA010)
武汉科技大学科研启动经费项目(010328)

Effect of Acid-Soluble Alirniinium Content on Characteristics of Inclusions in Silicon Killed Steel and Nozzle Clogging

Zheng Wan¹ , Shen Xing¹, Li Guangqiang¹, Zhu Chengyi¹ , Wu Zhenhua¹, Tu Hao¹， Lu Kai²

1 Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan 430081 ；
2 General Steelmaking Plant, Wuhan Iron and Steel Co Ltd, Wuhan 430083

Received:2013-08-28 Published:2014-02-01 Online:2022-09-06

摘要/Abstract

摘要： 通过500 g MoSi₂电阻炉熔炼试验考察了酸溶铝Als含量对硅镇静钢中夹杂物形貌、组成、数量及熔点的影响,并对KR铁水预处理-BOF-吹Ar-LF-CC流程现场水口残留物进行微观观察,探讨了夹杂物堵塞水口的机理,提出了硅镇静钢中铝含量的合理控制范围。结果表明,随Als含量增加硅镇静钢的夹杂物熔点升高,夹杂物数量减少;观察水口残留物为低熔点夹杂物镶嵌高熔点夹杂物,高Als钢中固态夹杂物以熔融态夹杂物为粘结剂聚集而粘附水口;钢液中Als含量控制在0.0030%~0.007 5%不会生成皮下气孔、不易水口堵塞。

关键词: 硅镇静钢, Als含量, 夹杂物特性, 水口结瘤, 皮下气孔

Abstract: The effect of acid-soluble aluminium Als content in steel on morphology, ingredient, number and melting point of inclusions in silicon killed steel has been studied by 500 g MoSi₂ electric resistance furnace melting trial, and the micro-observation on residue of nozzle clogging at situ of KR metal pretreatment-BOF-Ar blowing-LF-CC process is carried out to explore the mechanism of nozzle clogging by inclusions and propose a reasonable control range of Als content in silicon killed steel. Results show that with increasing Als content in steel the melting point of inclusions in silicon killed steel increases and the number of inclusions decreases ； the observation on residue in nozzle gets that the high melting point inclusions are embedded in low melting point inclusions, it is indicated the solid inclusions in high Als steel are accumulated and adhered at nozzle by molten inclusions which are coherent agent； the subskin blowhole shall not occurred and nozzle is not easily clogging as Als content in liquid is controlled in 0.003 0% ~0. 007 5%.

郑万, 沈星, 李光强, 朱诚意, 吴振华, 屠浩, 卢凯. 酸溶铝含量对硅镇静钢夹杂物特征及水口堵塞的影响[J]. 特殊钢, 2014, 35(1): 36-39.

Zheng Wan, Shen Xing, Li Guangqiang, Zhu Chengyi, Wu Zhenhua, Tu Hao, Lu Kai. Effect of Acid-Soluble Alirniinium Content on Characteristics of Inclusions in Silicon Killed Steel and Nozzle Clogging[J]. Special Steel, 2014, 35(1): 36-39.

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