Binder Effect on Properties of Cr2O3-bearing Corundum-based Refractory Castables

doi:10.19691/j.cnki.1004-4493.2023.03.008

China's Refractories ›› 2023, Vol. 32 ›› Issue (3): 36-41.DOI: 10.19691/j.cnki.1004-4493.2023.03.008

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Binder Effect on Properties of Cr₂O₃-bearing Corundum-based Refractory Castables

ZHANG Hongrui, CHEN Liugang^*

Henan Key Laboratory of High Temperature Functional Ceramics, School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450052, China

Online:2023-09-15 Published:2023-11-07
Contact: *e-mail: lgchen@zzu.edu.cn
About author:Zhang Hongrui, born in 1998, obtained his bachelor’s degree from Shenyang Aerospace University in 2020, majoring in functional materials. He is currently studying for his master’s degree in Henan Key Laboratory of High Temperature Functional Ceramics, School of Materials Science and Engineering, Zhengzhou University. His research focuses on the preparation and application of reactive MgO bonded Cr₂O₃-containing refractory castables.

Abstract

Abstract: Cr₂O₃-bearing castables bonded with reactive MgO (RM) or calcium aluminate cement (CAC) were studied to evaluate the binder effect on their performance in corrosive environments. The properties of the as-prepared castables were compared with respect to the differences in phase composition and microstructure. The corrosion behavior of the as-prepared castables by CaO-Al₂O₃-Fe₂O₃-SiO₂-based slag was systematically compared via refractory cup testing at 1 600 ℃ with respect to the differences in phase composition and microstructure. The analysis indicates that RM bonded castables show higher apparent porosity, lower bulk density and strengths after drying at 110 ℃ and firing at 1 300 ℃, and higher permanent linear change after firing at 1 300 ℃, but better slag corrosion and infiltration resistance compared with CAC bonded castables.

Key words: corrosion resistance, Cr₂O₃-bearing castables, refractories, reactive MgO, Mg(Al,Cr)₂O₄ spinel

ZHANG Hongrui, CHEN Liugang. Binder Effect on Properties of Cr₂O₃-bearing Corundum-based Refractory Castables[J]. China's Refractories, 2023, 32(3): 36-41.

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Binder Effect on Properties of Cr₂O₃-bearing Corundum-based Refractory Castables

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