Flotation de-silicating from diasporic-bauxite with cetyl trimethylammonium bromide

来源期刊：中南大学学报(英文版)2003年第4期

论文作者：王毓华 胡岳华 刘晓文

文章页码：324 - 328

Key words：aluminum-silicate; bauxite; reverse flotation; cetyl trimethylammonium bromide

Abstract: Using cetyl trimethylammonium bromide (CTAB) as collector, the flotation de-silicating from diasporic-baux-ite was investigated. And the Zeta potentials and contact-angles of silicate minerals and diaspore were also stu-died.The results show that in the presence of 2×10^-4mol·L^-1CTAB, the surface charges of pyrophyllite, kaolinite and illite become more positive, and the contact angles of these three silicates also increase evidently in the pH range of 2-8, but the Zeta potentials and contact angles of diaspore change little. So, the floatability of the four minerals is in the following order: pyrophyllite>kaolinite≈illite>diaspore. The open-circuit flotation results also show that a bauxite concentrate with m(Al₂O₃)/m(SiO₂) over 9.3 and Al2O3recovery over 76% can be obtained from diasporic-bauxite ore. The result of XRD of the bauxite concentrate shows that pyrophyllite is easier to be removed from diasporic-bauxite than illite and kaolinite due to its better floatability.