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宽厚板低成本洁净钢生产工艺 被引量:8

Production process of low-cost clean steel for wide and heavy plate
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摘要 为了进一步提高钢板洁净度,降低生产成本,通过理论计算和工业试验对宽厚板LF-VD精炼双联低成本洁净钢生产工艺进行了研究。VD精炼过程中,精炼渣中SiO2与钢中铝反应,使渣中SiO2质量分数降低、Al2O3质量分数升高。通过优化转炉和精炼脱氧合金化制度,降低VD前精炼渣中SiO2质量分数和钢中铝质量分数,减弱了VD过程渣钢反应。VD过程铝损降低29%。不仅炼钢过程综合吨钢铝耗降低0.68kg,而且钢板洁净度显著提升。全氧和氮质量分数都分别降低0.0006%,钢板中大于2μm夹杂物数量密度降低74%,大于5μm夹杂物数量密度降低81%。 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 Al2 O3 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 0.0006%,and the number density of inclusions which more than 2μm and more than 5μm in the steel plate were decreased by 74%and 81%respectively.
作者 李超 李建新 刘占礼 张飞 姜静宇 李杰 LI Chao;LI Jian-xin;LIU Zhan-li;ZHANG Fei;JIANG Jing-yu;LI Jie(Technology Research Institute,HBIS Group Co.,Ltd.,Shijiazhuang 050023,Hebei,China;Wusteel,HBIS Group Co.,Ltd.,Wugang 462500,Henan,China;School of Metallurgical and Ecological Engineering,University of Science and and Technology Beijing,Beijing 100083,China)
出处 《钢铁》 CAS CSCD 北大核心 2020年第9期38-42,共5页 Iron and Steel
基金 河北省自然科学基金钢铁联合研究基金资助项目(E2019318013)。
关键词 宽厚板 夹杂物 渣钢反应 脱氧 洁净钢 wide and heavy plate inclusion steel-slag reaction deoxidation clean steel
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