CeAlO_(3)夹杂物在中间包覆盖剂的溶解行为  

Dissolution behavior of CeAlO_(3)inclusion in the tundish flux

作　　者：郑祥 亓捷[1,2] 郑毅浩 刘承军 ZHENG Xiang;QI Jie;ZHENG Yi-hao;LIU Cheng-jun(Key Laboratory for Ecological Metallurgy of Multimetallic Mineral(Ministry of Education),Northeastern University,Shenyang 110819,Liaoning,China;School of Metallurgy,Northeastern University,Shenyang 110819,Liaoning,China)

机构地区：[1]东北大学多金属共生矿生态化冶金教育部重点实验室,辽宁沈阳110819 [2]东北大学冶金学院,辽宁沈阳110819

出　　处：《连铸》2022年第5期37-42,共6页Continuous Casting

基　　金：国家自然科学基金资助项目(U1908224,51874082,51904064);中国博士后科学基金资助项目(2020T130084);中央高校基本科研业务专项资金资助(N2125013)。

摘　　要：钢中存在的大量高熔点稀土夹杂物会在连铸过程中引发水口结瘤问题。通过静态法和热丝法高温原位观察研究了CeAlO_(3)夹杂物在中间包覆盖剂的溶解行为。静态试验研究结果表明,CeAlO_(3)在溶解过程中会产生中间层。随着溶解时间的增加,CeAlO_(3)溶解程度加剧,溶解形成的中间产物CaCeAlO_(3)逐渐长大。热丝法(SHTT)原位观察试验表明,CeAlO_(3)颗粒在溶解过程表观尺寸先降低后增加最后保持相对稳定。CeAlO_(3)在当前熔渣的溶解通过与渣中CaO反应形成产物层,然后形成的产物层向渣中溶解。因此,CeAlO_(3)在当前熔渣中的溶解方式为间接溶解。The existence of large amounts of rare earth inclusions with high melting points in steel can cause clogging of submerged entry nozzles during continuous casting.Dissolution mechanism of CeAlO_(3)inclusion in the tundish flux was investigated by static method and SHTT in-situ observation.Results of static experimental showed that an intermediate layer formed during the dissolution process of CeAlO_(3).With the increase of dissolution time,the dissolution of CeAlO_(3)became more serious,and the size of the CaCeAlO_(3)formed in interfacial layer increased gradually.SHTT in-situ observation experimental showed that the apparent size of CeAlO_(3)particle first decreased,then increased and finally remained relatively stable during the dissolution process.The CeAlO_(3)reacted with CaO in the slag to form a product layer in the current slag,and then the formed product layer was dissolved into the slag.Therefore,the dissolution method of CeAlO_(3)was indirect dissolution in the current slag.

关 键 词：CeAlO_(3) 夹杂物 溶解 CaO-Al2O3基覆盖剂 热丝法 

分 类 号：TF777[冶金工程—钢铁冶金]