Dissolution behavior of CeAlO3 inclusion in the tundish flux
ZHENG Xiang1,2, QI Jie1,2, ZHENG Yi-hao1,2, LIU Cheng-jun1,2
1. Key Laboratory for Ecological Metallurgy of Multimetallic Mineral (Ministry of Education), Northeastern University, Shenyang 110819,Liaoning,China; 2. School of Metallurgy, Northeastern University, Shenyang 110819,Liaoning, China
Abstract：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 CeAlO3 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 CeAlO3. With the increase of dissolution time, the dissolution of CeAlO3 became more serious, and the size of the CaCeAl3O7 formed in interfacial layer increased gradually. SHTT in-situ observation experimental showed that the apparent size of CeAlO3 particle first decreased, then increased and finally remained relatively stable during the dissolution process. The CeAlO3 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 CeAlO3 was indirect dissolution in the current slag.
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2022, Vol. 41 
