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通过辉钼矿浮选实验、Zeta电位测试、Al~(3+)溶液化学分析及X射线光电子能谱分析(XPS),研究了选钼回水中的Al~(3+)对辉钼矿可浮性的影响及其作用机制.结果表明,铝离子会恶化辉钼矿的浮选指标,并导致其表面Zeta电位显著偏移,表明辉钼矿表面有Al~(3+)吸附;Al~(3+)在溶液中主要以铝离子、羟基铝离子、氢氧化铝沉淀形式存在,后两者具有极强的极性,能吸附在辉钼矿活泼的“棱”上,铝离子与辉钼矿“棱”氧化生成的MoO_4~(2-)反应生成钼酸铝沉淀;由于辉钼矿“棱”的面积比“面”的面积小很多,而铝离子主要吸附在“棱”上,因此铝元素含量不多,但其确实能吸附在辉钼矿表面,且既有物理吸附也有化学吸附.
The molybdenite flotation experiment, Zeta potential test, Al 3+ solution chemical analysis and X-ray photoelectron spectroscopy (XPS) The results show that aluminum ions can aggravate the flotation index of molybdenite and lead to a significant shift of Zeta potential on the surface of molybdenite, indicating that there is Al 3+ adsorption on the surface of molybdenite. (3+) mainly exists in the form of aluminum ions, aluminum hydroxide ions and aluminum hydroxide precipitates. The latter two have extremely strong polarities and can adsorb on the active edge of molybdenite. MoO_4 ~ (2-) generated by the oxidation of the “edge” of molybdenum ore reacts to form aluminum molybdate precipitate. Because the area of “edge” of molybdenite is much smaller than the area of “face”, aluminum ions are mainly adsorbed on the " Therefore, aluminum content is small, but it does adsorb on the molybdenite surface, and both physical adsorption and chemical adsorption.