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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 13    No. 3    June 2003

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Aluminum-silicates flotation with
quaternary ammonium salts
WANG Yu-hua(王毓华), HU Yue-hua(胡岳华), CHEN Xiang-qing(陈湘清)

School of Resources Processing and Bioengineering,
Central South University, Changsha 410083, China

Abstract:The zeta potential measurements show that the flotation separation of diaspore from kaolinite, illite and pyrophyllite could be achieved in the range of pH 4-6.5 with cationic collectors. A special quaternary ammonium salts(DTAL) shows better selectivity than that the dodecyl amine(DDA) does for the flotation of three silicates. The closed-circuit flotation results show that the reverse flotation de-silicate can be achieved with DTAL as collector, a new inorganic reagent(SFL) as depressant and MIBC as frother to obtain a bauxite concentrate m(Al2O3)/m(SiO2)>10, Al2O3 recovery>86%).

 

Key words:  aluminum-silicates; diasporic-bauxite; reverse flotation; quaternary ammonium salts

ISSN 1672-7029
CN 43-1423/U

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