Formation of ferrospinel layer at the corroded interface between Al2O3‐spinel refractory and molten steel in RH refining ladle

Journal of the American Ceramic Society - Tập 104 Số 11 - Trang 6044-6053 - 2021
Junfeng Chen1, Yaping Cheng1, Yuanyuan Li2, Junli Xiao1, Yu Zhang1, Guangping Liu2, Yaowu Wei1, Guangqiang Li1, Shaowei Zhang3, Nan Li1
1The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan, China
2Zili Refractories Group Co., Ltd. Zhejiang China
3College of Engineering, Mathematics and Physical Sciences, University of Exeter, Exeter, UK

Tóm tắt

AbstractRefining ladle is generally the last inclusion‐removal vessel before the continuous casting of steel, so, it has a vital effect on the final steel quality. In this work, degradation process of a cement‐free Al2O3‐MgAl2O4 refractory in contact with molten steel/slag in the metal bath area of a Ruhrstahl Heraeus (RH) refining ladle was investigated. A reaction product layer with the formation of ferrospinel (hercynite) and Fe‐rich phases was observed, suggesting that the interactions/reactions between the refractory lining and the molten steel should also be considered to have a better understanding of overall degradation mechanism of the refractory served under the RH refining conditions. The two types of alumina grains in the refractory, sintered and fused alumina, were attacked in an active way and a passive way, respectively. The effect of the crack generation and steel infiltration on degradation of the refractory was also discussed in detail, based on the microstructural characterizations.

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Thông tin xuất bản

Journal of the American Ceramic Society

Tập 104 Số 11

6044-6053

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