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首页> 外文期刊>Journal of Central South University of Technology >Flotation de-silicating from diasporic-bauxite with cetyl trimethylammonium bromide
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Flotation de-silicating from diasporic-bauxite with cetyl trimethylammonium bromide

机译：十六烷基三甲基溴化铵从渗水铝土矿浮选脱硅

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摘要

Using cebyl trimethylammonium bromide (CTAB) as collector, the flotation de-silicating from diasporic-bauxite was investigated. And the Zeta potentials and contact-angles of silicate minerals and diaspore were also studied. The results show that in the presence of 2 X 10~(-4) mol·L~(-1)CTAB, the surface charges of pyrophyllite, kaolin-ite 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(Al_2O_3)/m(SiO_2) over 9. 3 and Al_2O_3 recovery 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.
机译：以十六烷基三甲基溴化铵（CTAB）为捕收剂，研究了从水铝土矿浮选脱硅作用。并研究了硅酸盐矿物与辉石的Zeta电位和接触角。结果表明，在2 X 10〜（-4）mol·L〜（-1）CTAB的存在下，叶蜡石，高岭石和伊利石的表面电荷变得更正，并且这三种硅酸盐的接触角也变大。在2-8的pH范围内明显增加，但Zeta电位和渗铝的接触角变化不大。因此，四种矿物的可浮性按以下顺序排列：叶蜡石>高岭石≈伊利石>水辉石。开路浮选结果还表明，可以从流散铝土矿中获得m（Al_2O_3）/ m（SiO_2）大于9. 3，Al_2O_3回收率超过76％的铝土矿精矿。铝土矿精矿的X射线衍射结果表明，叶蜡石比伊利石和高岭石更容易从流散铝土矿中去除，因为叶绿石具有更好的漂浮性。

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