宽厚板低成本洁净钢生产工艺

doi:10.13228/j.boyuan.issn0449-749x.20190505

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Abstract In order to further improve the cleanliness of steel plate and reduce production cost,the production process of low-cost clean steel with LF-VD refining for the wide and heavy plate was studied by theoretical calculation and industrial tests. In the VD refining process, SiO₂ in the refining slag reacted with Al in the steel, reducing the mass percent of SiO₂ and increasing the mass percent of Al₂O₃ in the slag. By optimizing the converter and refining deoxidization and alloying system, the mass percent of SiO₂ in the refined slag and the mass percent of Al in the steel before VD were reduced, and the reaction of slag-steel in VD process was weakened. Aluminum loss in the VD process was reduced by 29%. Not only did the aluminum consumption of per ton steel decrease by 0.68 kg, but also the cleanliness of the steel plate increased significantly. The mass percent of total oxygen and nitrogen were decreased by 0.000 6%, and the number density of inclusions which more than 2 μm and more than 5 μm in the steel plate were decreased by 74% and 81% respectively.

Key words： wide and heavy plate inclusion steel-slag reaction deoxidation clean steel

Received: 20 November 2019

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	Articles by authors
	LI Chao
	LI Jian-xin
	LIU Zhan-li
	ZHANG Fei
	JIANG Jing-yu
	LI Jie

Cite this article:

LI Chao,LI Jian-xin,LIU Zhan-li等. Production process of low-cost clean steel for wide and heavy plate[J]. Iron and Steel, 2020, 55(9): 38-42.

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http://www.chinamet.cn/Jweb_gt/EN/10.13228/j.boyuan.issn0449-749x.20190505 OR http://www.chinamet.cn/Jweb_gt/EN/Y2020/V55/I9/38

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