Fe3+对水玻璃体系下萤石、方解石浮选分离的影响

    Effect of Fe3+ on Flotation Separation of Fluorite and Calcite in Sodium Silicate System

    • 摘要: 这是一篇矿物加工工程领域的论文。萤石和方解石都属于含钙矿物,具有相似的物理和化学性质,这两种矿物的浮选分离一直是选矿界的难题之一。通过浮选实验、吸附量测试、Zeta电位测量以及浮选溶液化学计算,引入Fe3+,研究了Fe3+对水玻璃体系下萤石、方解石浮选分离的影响及其机理。浮选实验结果表明,相较于水玻璃,Fe3+的加入对方解石浮选产生较强的抑制作用,而对萤石浮选影响较小,达到两种矿物的选择性分离。吸附量测试、Zeta电位测量和浮选溶液化学计算结果表明,水玻璃体系中引入Fe3+后,溶液中生成的Fe-(OH)x、Fe3+-水玻璃聚合物以及Si(OH)4选择性吸附在方解石表面,阻碍了捕收剂油酸钠的进一步吸附,从而达到萤石和方解石的浮选分离。

       

      Abstract: This is an essay in the field of mineral processing engineering. Fluorite and calcite are calcium-bearing minerals with similar physical and chemical properties. Flotation separation of the two minerals has always been one of the difficult problems in the ore processing field. The effect of Fe3+ on flotation separation of fluorite and calcite in sodium silicate system and its mechanism was studied by flotation test, adsorption amount measurement, Zeta potential measurement and chemical calculation of flotation solution. The flotation test results show that, compared with sodium silicate, the addition of Fe3+ has a stronger inhibition effect on the flotation of calcite, but little effect on the flotation of fluorite, which can achieve the selective separation of the two minerals. The results of adsorption amount measurement, Zeta potential measurement and chemical calculation of flotation solution showed that after introducing Fe3+ into the sodium silicate system, Fe-(OH)X, Fe-sodium silicate polymer and Si(OH)4 were selectively adsorbed on the surface of calcite, which hindered the further adsorption of sodium oleate as collector, thus achieving the separation of fluorite and calcite.

       

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