四嗪硫铜捕收剂浮选分离黄铜矿和黄铁矿

Flotation separation of pyrite from chalcopyrite by tetrazinan-thione collectors

黄药对硫化矿具有很强的捕收性能,但其对黄铜矿和黄铁矿的分离效果不佳。为了有效地从黄铜矿中分离出黄铁矿,本文将四嗪硫铜官能团和疏水烃基结合,设计出一种新型的捕收剂-四嗪硫铜捕收剂。探究了四嗪硫铜捕收剂对黄铜矿和黄铁矿的浮选性能,并研究了四嗪硫铜捕收剂中不同的疏水烃链对浮选性能的影响。紫外实验结果表明,6-己基-6-甲基-1,2,4,5-四嗪-3-硫铜(HxMTT)易于与铜离子和亚铜离子结合,并在结合过程中释放氢离子进入溶液,但不易与铁离子和亚铁离子结合。原子力和接触角实验结果表明,HxMTT吸附在黄铜矿的表面,增加了黄铜矿表面的疏水性。红外和XPS实验结果进一步表明,HxMTT通过形成Cu—N和Cu—S键化学吸附在黄铜矿表面。

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 Cu^(2+),which accompanied by the release of H^(+)into solution,while HxMTT was not easy to bond with Fe^(2+)and Fe^(3+).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.