%0 Journal Article
%T Sulphidisation of oxides and oxidised sulphides and adsorption of thiol collectors on the sulphidised products-a critical review.
%A Moimane T
%A Peng Y
%A Moimane T
%A Peng Y
%A Moimane T
%A Peng Y
%J Adv Colloid Interface Sci
%V 305
%N 0
%D Jul 2022
%M 35609399
%F 15.19
%R 10.1016/j.cis.2022.102697
%X 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.