高铝钢结晶器内钢渣反应分析  

Analysis of liquid slag performance in high aluminum steel crystallizer

作　　者：齐实 李晓阳 赵春宝 刘增勋 肖鹏程 朱立光 QI Shi;LI Xiaoyang;ZHAO Chunbao;LIU Zengxun;XIAO Pengcheng;ZHU Liguang(School of Metallurgy and Energy,North China University of Science and Technology,Tangshan 063210,Hebei,China;Xixia Longcheng Metallurgical Materials Co.,Ltd.,Nanyang 474550,Henan,China;School of Materials Science and Engineering,Hebei University of Science and Technology,Shijiazhuang 050018,Hebei,China)

机构地区：[1]华北理工大学冶金与能源学院,河北唐山063210 [2]西峡龙成冶金材料有限公司,河南南阳474550 [3]河北科技大学材料科学与工程学院,河北石家庄050018

出　　处：《连铸》2025年第1期81-86,共6页Continuous Casting

基　　金：国家基金面上资助项目(52474358);国家基金重点资助项目(U2A20114);河北省创新能力提升计划资助项目(23561007D)。

摘　　要：连铸生产高铝钢过程中,在结晶器钢水液面处钢液Al元素与保护渣发生强烈的钢渣界面反应,导致保护渣产生严重变性,直接危害着铸坯质量和连铸生产顺行。对高铝钢连铸过程中保护渣液渣层动态取样,分析了连铸过程中液渣层成分和理化性能的变化规律;通过热力学和动力学研究了钢渣之间的反应行为。结果发现,在浇注过程中液渣中Al_(2)O_(3)质量分数由1.40%上升到24.75%,SiO_(2)质量分数由32.26%降低到17.69%;液渣平均黏度由原渣的0.38 Pa·s增加到0.58 Pa·s,平均熔化温度由原渣的1 112℃提高到1 189℃。保护渣液渣成分变动趋势符合钢渣反应的热力学规律,钢渣界面的化学反应是钢渣界面反应和液渣变性程度的限制性环节。During the continuous casting process of producing high aluminum steel,at the liquid level of the crystallizer,there is a strong interface reaction between the Al element in the molten steel and the mold slag,which leads to serious denaturation of the mold slag and directly endangers the quality of the billet and the smooth operation of continuous casting production.The mold slag layer was dynamically sampled during the continuous casting process of high aluminum steel,and analyzed the changes in the composition and physicochemical properties of the slag layer during the continuous casting process.The reaction behavior between steel slag was studied through thermodynamics and kinetics.The results showed that during the pouring process,the Al_(2)O_(3)content in the slag increased from 1.40%to 24.75%,and the SiO_(2)content decreased from 32.26%to 17.69%.The average viscosity of the liquid slag increased from 0.38Pa·s of the original slag to 0.58Pa·s,and the average melting temperature increased from 1112℃of the original slag to 1189℃.The trend of changes in the composition of mold slag conforms to the thermodynamic law of steel slag reaction,and the mass transfer behavior of Al2O3in the liquid slag layer is a limiting link in the interface reaction of steel slag and the degree of liquid slag denaturation.

关 键 词：高铝钢 保护渣 钢渣界面反应 热力学计算 动力学计算 

分 类 号：TF777[冶金工程—钢铁冶金]