Influence of metal ions on muscovite and calcite flotation: With respect to the pre-treatment of vanadium bearing stone coal
Influence of metal ions on muscovite and calcite flotation: With respect to the pre-treatment of vanadium bearing stone coal
复制标题
金属离子对白云母和方解石浮选的影响——以含钒石煤预处理为例
DOI：
10.1016/j.colsurfa.2018.12.036
复制
发表时间：
2019
期刊：
影响因子：
--
通讯作者：
Cai Zhenlei
中科院分区：
文献类型：
--
作者：
Wang Xingjie;Zhang Yimin;Liu Tao;Cai Zhenlei
本文研究了用浮选法脱除脱碳石煤中的方解石。通过微浮选实验、水相形态计算、Zeta电位和XPS测试，研究了Al3+、Fe3+、Ca2+对白云母和方解石浮选行为的影响。微浮选结果表明，以油酸钠为捕收剂时，Ca~(2+)对白云母和方解石的可浮性影响不大，而Al~(3+)和Fe~(3+)显著减小了白云母和方解石的可浮性差异。在Al~(3+)和Fe~(3+)存在下，白云母被激活，方解石被抑制。水相形态计算结果表明，金属离子的存在形式决定了它们对矿物可浮性的影响程度。Zeta电位和XPS测试表明，金属离子在白云母表面的吸附依赖于pH，但吸附的金属离子并不随pH的变化而完全解吸。
This work focused on the removal of calcite from the decarburized stone coal using flotation. The influence of Al3+, Fe3+, and Ca2+on the flotation behavior of muscovite and calcite was studied by micro-flotation experiments, aqueous speciation calculation, zeta potential and XPS measurements. The micro-flotation results showed that the Ca2+exhibited little impact on muscovite and calcite floatability with sodium oleate as collector, while the Al3+and Fe3+remarkably reduced the floatability differences between muscovite and calcite. In the presence of Al3+and Fe3+, the muscovite was activated, and the calcite was depressed. The aqueous speciation calculation results showed that the existing form of metal ions determined the extent of their influence on mineral floatability. Zeta potential and XPS measurements demonstrated that the adsorption of metal ions on muscovite surface was pH dependent, but the adsorbed metal ions did not entirely desorb with the pH adjustment.