Aluminum-silicates flotation with
quaternary ammonium salts
quaternary ammonium salts
(School of Resources Processing and Bioengineering,
Central South University, Changsha 410083, China)
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