Comparative study on interaction between rare earth oxide refractories and rare earth treated steel

作者：Meng, Ze; Li, Guang-qiang; Yuan, Cheng; Zhao, Yi-jiang; Zheng, Qing; Zeng, Bin; Liu, Yu^*

来源：JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL, 2023.

DOI：10.1007/s42243-023-01123-z

• CeAlO3 refractory
• Steel
• Cleanliness
• Interaction
• Rare earth

Refractories have an important effect on the cleanliness of molten steel. The interaction between CeAlO3 refractories and Ce treated steel was explored and compared with that between Al2O3 refractories and Ce treated steel. The results show that the Ce content in steel decreases sharply after contact with Al2O3 refractories and the pick-up of dissolved Al occurs. Compared with the test of Al2O3 refractories, the loss of Ce content is less in the test of CeAlO3 refractory, and the total oxygen content and dissolved Al content in steel increase less. The dense and continuous Ce2O2S interface layer is observed at the CeAlO3 refractories/steel interface, which can serve as the metallurgical isolation layer and hinder the further interaction between refractories and steel. Therefore, the higher steel cleanliness and less penetration of refractories by molten steel are obtained in the test of CeAlO3 refractories. The CeAlO3 refractories show a promising prospect in the production of clean Ce treated steel.

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