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J. Korean Ceram. Soc. > Volume 18(3); 1981 > Article
Journal of the Korean Ceramic Society 1981;18(3): 182.
규산염 알루미나 광으로부터 알루미나 추출에 관한 연구
신병식, 맹중재
한양대학교 공업화학과
Alumina Extraction from Aluminium Silicates
The extraction of $Al_2O_3$ from the backed mixture of grinded aluminium silicates with $H_2SO_4$ and required heating energy for the baking process has been investigated. The extraction ration of $Al_2O_3$ from baked kaolin and alunite being mixed with 70-80% $H_2SO_4$ at 12$0^{circ}C$ for 3 hours was more than 90%, the yield was based on alumina component in the ore by extracted with water. The required heating energy was 1782 cal/300gr (Alunite), that is, when alunite ore treated with equivalent amount of 80% $H_2SO_4$, also left it for 75 minites at 12$0^{circ}C$, The required heating energy was 22, 553 cal/200gr(Alunite) when the above sample was heated again at 15$0^{circ}C$ for 2 hours.
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