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J. Korean Ceram. Soc. > Volume 44(6); 2007 > Article
Journal of the Korean Ceramic Society 2007;44(6): 331.
doi: https://doi.org/10.4191/kcers.2007.44.6.331
내화물 응용을 위한 산화물 재료들과 탄소와의 고온 반응거동
최도문, 이진석, 김남훈, 최성철
한양대학교 신소재공학과
High Temperature Reaction Behaviors of Oxide Materials with Carbon for Refractory Application
Do-Mun Choi, Jin-Seok Lee, Nam-Hoon Kim, Sung-Churl Choi
Department of Advanced Materials Science and Engineering, Hanyang University
ABSTRACT
High temperature reaction behaviors of various oxide materials (such as bauxite, pyrophyllite, mullite and fused silica powders) used in the refractory materials for tap-hole plugging of blast furnace were investigated with varying temperature in the carbon surrounding. Kinetics of carbothermal reduction of $SiO_2$ for forming SiC with high corrosion resistance were strongly dependent on it's crystalline phase. SiC generation yield increased with increasing catalyst amount in oxide regardless of generated SiO gas amount at temperature of $<1500^{circ}C$. However, in case of fused silica over $1500^{circ}C$, SiC generation yield was dominantly influenced by SiO amount without catalyst effect. Bauxite showed the most effective carbothermal reduction reaction, since bauxite have a large amount of catalyst and well-dispersed $SiO_2$ phase in oxide matrix.
Key words: Carbothermal reduction, Silicon carbide, Corrosion resistance, High temperature reaction, Refractory
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