作者：LIU Yu1LI Guangqiang1,2,3ZHANG Zhao2WANG Li2

作者单位：1. The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology2. Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education Wuhan University of Science and Technology3. Collaborative Innovation Center of Steel Technology, University of Science and Technology Beijing

刊名：China’s Refractories

ISSN：1004-4493

出版年：2018-09-15

卷：27

期：3

起页：32-37

止页：

分类号：TF341;TQ175.7

语种：英文

关键词：

内容简介

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.