Abstract：
Sulphidisation, an electrochemical process for conversion of a non-sulphide, oxide or oxidised sulphide, to a sulphide surface that facilitates efficient adsorption of thiol collectors to impart hydrophobicity, offers a way to improve the enrichment of oxide and oxidised sulphide ores by flotation. Although it has shown great potential, it has equally proved to suffer from drawbacks such as low efficiency, difficulty to sulphidise minerals that are prone to surface oxidation and the chemistry at play remains insufficiently understood. These drawbacks hinder the full potential of the sulphidisation process as a remediation strategy for flotation of oxide and oxidised sulphide ores. A holistic understanding of the process is crucial in identification of the underpinning phenomena that render the process inefficient and will be a stepping stone in the quest to modify it for an improved efficiency. Therefore, this paper seeks to review the sulphidisation reactions and products at the mineral-solution interfaces of oxide and oxidised sulphide minerals. The influence and implications of the sulphidisation conditions on adsorption of thiol collectors on mineral surfaces to impart hydrophobicity necessary for flotation are also highlighted. Finally, it makes recommendations on how to circumvent the drawbacks and provides guidelines for future research and industrial application.
摘要：
硫化,非硫化物转化的电化学过程，氧化物或氧化硫化物，到硫化物表面，促进硫醇捕收剂的有效吸附，以赋予疏水性，提供了一种通过浮选提高氧化物和氧化硫化物矿石富集的方法。虽然已经显示出巨大的潜力,它同样被证明存在效率低下等缺点，难以硫化易于表面氧化的矿物和发挥作用的化学性质仍然没有得到足够的理解。这些缺点阻碍了硫化过程作为氧化物和氧化硫化物矿石浮选的补救策略的全部潜力。对过程的整体理解对于识别使过程效率低下的基础现象至关重要，并且将成为寻求修改过程以提高效率的垫脚石。因此,本文旨在回顾氧化物和氧化硫化物矿物的矿物溶液界面处的硫化反应和产物。还强调了硫化条件对硫醇捕收剂在矿物表面上吸附以赋予浮选所必需的疏水性的影响和意义。最后,它就如何规避这些缺点提出了建议，并为未来的研究和工业应用提供了指导方针。
