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J. Korean Ceram. Soc. > Volume 38(9); 2001 > Article
Journal of the Korean Ceramic Society 2001;38(9): 822.
화학제품용 및 금속제련용 수산화알루미늄 제품 특성
김대웅, 백용혁
전남대학교 세라믹공학과${\cdot}$신소재 기술연구소
Properties of Chemical Grade and Smelting Grade Aluminium Trihydroxide
Dae-Woong Kim, Yong-Hyuck Baik
Department of Ceramic Engineering Advanced Materials Research Institute, Chonnam National University
Bayer process is based on the extraction of aluminium trihydroxide from bauxite. The process is operated with the several criteria such as primary crystal size, particle size distribution and yield etc.. In this study basing on the previous results, an investigation on the effect of chemical grade and smelting grade aluminium trihydroxide precipitation condition were undertaken. As a result, particle size was 42∼44${mu}$m form chemical grade product and 74∼77${mu}$m for smelting grade product. The yield and solubility by acid of chemical grade product was higher than smelting grade product. The attrition index of smelting grade product was lower than that of other commercial product because primary crystal size of the smelting grade product was small.
Key words: Aluminium trihydroxide, Sodium aluminate, Attrition index
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