Effect of C@SiC Composite Powder Addition on Properties of Al2O3-SiC-C Castables for Iron Trough

doi:10.19691/j.cnki.1004-4493.2022.04.008

China's Refractories ›› 2022, Vol. 31 ›› Issue (4): 39-44.DOI: 10.19691/j.cnki.1004-4493.2022.04.008

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Effect of C@SiC Composite Powder Addition on Properties of Al₂O₃-SiC-C Castables for Iron Trough

LIU Zhenglong, DENG Chengji, YU Chao, DING Jun^*, ZHU Hongxi

The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, China

Online:2022-12-15 Published:2022-12-23
Contact: * e-mail: dingjun@wust.edu.cn
About author:Liu Zhenglong is a doctoral student at Wuhan University of Science and Technology. His main research interests are preparing modified carbon materials and optimizing the structure and properties of carbon composite refractories and carbon-containing castables.

Abstract

Abstract: Al₂O₃-SiC-C castables were prepared using C@SiC composite powder modified by molten salts to replace ball pitch gradually. The effects of the C@SiC composite powder addition (0, 1%, 1.5%, and 2%, by mass) on the water requirement, the flow value, the physical properties, the thermal shock resistance, the oxidation resistance, and the corrosion resistance of castables were studied. The results show that with the C@SiC addition increasing, the amount of water added to the castable increases, but the apparent porosity of the samples after heat treatment first increases and then decreases, and the cold modulus of rupture increases significantly. After completely replacing the ball pitch, the cold modulus of rupture of the sample increases by 51.2%, and the residual strength ratio increases by 28.7%. In addition, the sample with 2% C@SiC has the best oxidation resistance, and the sample with 1.5% C@SiC composite powder has the smallest corrosion depth.

Key words: alumina-silicon carbide-carbon castables, oxidation resistance, thermal shock resistance

LIU Zhenglong, DENG Chengji, YU Chao, DING Jun, ZHU Hongxi. Effect of C@SiC Composite Powder Addition on Properties of Al₂O₃-SiC-C Castables for Iron Trough[J]. China's Refractories, 2022, 31(4): 39-44.

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Effect of C@SiC Composite Powder Addition on Properties of Al₂O₃-SiC-C Castables for Iron Trough

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