A novel small molecule depressant (M-DEP) was used to separate chalcopyrite and molybdenite via flotation. The results showed that M-DEP had an excellent selective depression on molybdenite, while had little effect on the flotation of chalcopyrite. The adsorption capacity of M-DEP on the surface of molybdenite was greater than that on chalcopyrite surface. The adsorption of M-DEP reduced the floatability of molybdenite and had less effect on the floatability of chalcopyrite, which was due to its different adsorption modes on the surface of the two minerals. Furthermore, the interaction between chalcopyrite and M-DEP was mainly chemical interaction, and almost all of the adsorbed M-DEP molecules were removed and replaced by sodium butyl xanthate (SBX). By contrast, hydrophobic interaction was the main way in which M-DEP was adsorbed on the molybdenite surface with little chemical interaction, which was less interfered by SBX addition. Therefore, M-DEP had a super selective depression on molybdenite. The study provided a novel depressant and approach for the deep separation of chalcopyrite and molybdenite via flotation.

中文翻译：

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一种新型辉钼矿抑制剂，用于黄铜矿和辉钼矿的高效选择性浮选分离


使用一种新型小分子抑制剂 （M-DEP） 通过浮选分离黄铜矿和辉钼矿。结果表明，M-DEP 对辉钼矿具有优异的选择性凹陷作用，而对黄铜矿的浮选影响很小。M-DEP 在辉钼矿表面的吸附能力大于黄铜矿表面。M-DEP 的吸附降低了辉钼矿的可浮性，对黄铜矿的可浮性影响较小，这是由于其在两种矿物表面的吸附模式不同。此外，黄铜矿与 M-DEP 之间的相互作用主要是化学相互作用，几乎所有吸附的 M-DEP 分子都被丁基黄原酸钠 （SBX） 去除并取代。相比之下，疏水相互作用是 M-DEP 吸附在辉钼矿表面的主要方式，化学相互作用很小，受 SBX 添加的干扰较小。因此，M-DEP 对辉钼石具有超选择性抑制。该研究为通过浮选深层分离黄铜矿和辉钼矿提供了一种新颖的抑制剂和方法。