Abstract This work focuses on the organic depressant, disodium bis(carboxymethyl) trithiocarbonate (DBT), as a selective depressant in copper-molybdenum sulfide flotation separation. Micro-flotation, Zeta potential, FTIR and XPS measurements were carried out to investigate the selective depression mechanism of DBT on chalcopyrite. Zeta potential and FTIR measurements revealed that DBT had higher affinity for chalcopyrite than molybdenite and the XPS results of chalcopyrite before and after treatment with DBT further proved that DBT adsorbed on chalcopyrite surface. The investigation indicates that the mechanism of DBT adsorbing on chalcopyrite is mainly physical adsorption. Locked circuit experiments were carried out and the results showed that DBT could be considered as a cleaner option in commercial Cu-Mo flotation separation circuits.

中文翻译：

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双（羧甲基）三硫代碳酸二钠对黄铜矿和辉钼矿分离的抑制行为及其机理

摘要这项工作着眼于有机抑制剂双（羧甲基）三硫代碳酸二钠（DBT），作为硫化铜-钼钼浮选中的选择性抑制剂。进行了微浮选，Zeta电位，FTIR和XPS测量，以研究DBT对黄铜矿的选择性抑制机理。Zeta电位和FTIR测量结果表明，DBT对黄铜矿的亲和力比辉钼矿高，并且黄铜矿在DBT处理前后的XPS结果进一步证明DBT吸附在黄铜矿表面。研究表明，DBT在黄铜矿上的吸附机理主要是物理吸附。进行了锁定电路实验，结果表明，DBT可以被认为是商用Cu-Mo浮选分离电路中的一种更清洁的选择。