Effect of Tundish Lining on Steel Cleanliness  

作　　者：LIU Yu LI Guangqiang ZHANG Zhao WANG Li 

机构地区：[1]The State Key Laboratory of Refractories and Metallurgy,Wuhan University of Science and Technology,Wuhan 430081,China [2]Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education,Wuhan University of Science and Technology,Wuhan 430081,China [3]Collaborative Innovation Center of Steel Technology,University of Science and Technology Beijing,Beijing 100083,China

出　　处：《China's Refractories》2018年第3期32-37,共6页中国耐火材料（英文版）

基　　金：the Major State Basic Research Development Program of China(Grant No.2014CB660800)

摘　　要：To clarify the effect of the tundish lining on the steel cleanliness,the MgO based and Al2 O3 based gunning materials（ GM） were used as the lining of the alumina crucibles,respectively,in which about 200 g of ultra-low carbon steel was charged at 1 823 K for 2 h in pure argon atmosphere. The chemical analysis was carried out to investigate the change of chemical composition of steel in contact with GM after high temperatures holding experiments. The steel cleanliness in terms of inclusion number density,inclusion size and inclusion size distribution was evaluated by SEM and EDS. It was found that the MgO GM provided more oxygen and showed a stronger oxidizing capacity due to its higher content of reducible oxides（ 10. 5 mass% SiO2＋ 2 mass%Fe2 O3）. The use of Al2 O3 GM resulted in an improved steel cleanliness and consequently Al2 O3 GM could be a promising refractory material in the tundish lining.To clarify the effect of the tundish lining on the steel cleanliness,the MgO based and Al2 O3 based gunning materials（ GM） were used as the lining of the alumina crucibles,respectively,in which about 200 g of ultra-low carbon steel was charged at 1 823 K for 2 h in pure argon atmosphere. The chemical analysis was carried out to investigate the change of chemical composition of steel in contact with GM after high temperatures holding experiments. The steel cleanliness in terms of inclusion number density,inclusion size and inclusion size distribution was evaluated by SEM and EDS. It was found that the MgO GM provided more oxygen and showed a stronger oxidizing capacity due to its higher content of reducible oxides（ 10. 5 mass% SiO2＋ 2 mass%Fe2 O3）. The use of Al2 O3 GM resulted in an improved steel cleanliness and consequently Al2 O3 GM could be a promising refractory material in the tundish lining.

关 键 词：tundish lining STEEL CLEANLINESS PENETRATION 

分 类 号：TF341[冶金工程—冶金机械及自动化] TQ175.7[化学工程—硅酸盐工业]