Flotation separation of pyrite from chalcopyrite by tetrazinan-thione collectors

Abstract

To effectively separte pyrite from chalcopyrite, tetrazine thione group and hydrocarbon chain were combined to synthesize tetrazine thione collectors. The flotation performance of tetrazine thione collectors on chalcopyrite and pyrite was investigated, and the influence of different hydrophobic groups on the flotation performance was revealed. UV tests indicated that HxMTT was easy to bond with Cu⁺ and Cu²⁺, which accompanied by the release of H⁺ into solution, while HxMTT was not easy to bond with Fe²⁺ and Fe³⁺. AFM and contact angle measurements implied that HxMTT adsorption on chalcopyrite increased the surface hydrophobicity of chalcopyrite. The results of FTIR indicated HxMTT chemisorption on chalcopyrite surface, and XPS analysis further indicated HxMTT chemisorption on chalcopyrite surface by Cu—N and Cu—S bonds.

Keywords

flotation separation / chalcopyrite / pyrite / tetrazine thione

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