In this study, the flotation separation performances of malachite from calcite were investigated using a new chelating collector S-carboxymethyl-O, O’-dibutyl dithiophosphate (CMDTP) by micro-flotation tests, which showed that CMDTP exhibited a stronger collecting power and a better selectivity on malachite than octyl hydroxamic acid (OHA), 8-hydroxyquinoline (HQ) and sodium isobutyl xanthate (SIBX). In the flotation separation of artificially mixed minerals, malachite could be separated successfully from calcite at pH around 9.0 when using Na₂S as a regulator. Its adsorption mechanism was also studied by FT-IR, zeta potential and XPS measurements, all of which confirmed that CMDTP showed a better affinity to malachite surface than to calcite surface. Furthermore, XPS provided obvious evidence that CMDTP could easily react with Cu²⁺ sites on malachite surface, and only a tiny adsorption occurred on calcite surface without Cu²⁺ ions.

在这项研究中，通过微浮选试验，使用新型螯合捕集剂S-羧甲基-O，O'-二丁基二硫代磷酸酯（CMDTP）研究了孔雀石与方解石的浮选性能，结果表明CMDTP具有更强的捕集能力和孔雀石的选择性优于辛基异羟肟酸（OHA），8-羟基喹啉（HQ）和异丁基黄原酸钠（SIBX）。在人工混合矿物的浮选中，使用Na ₂时，在9.0左右的pH下，孔雀石可以成功地从方解石中分离出来。S作为调节器。还通过FT-IR，ζ电势和XPS测量研究了其吸附机理，所有这些都证实CMDTP对孔雀石表面的亲和力比对方解石表面的亲和力好。此外，XPS提供了明显的证据，表明CMDTP可以很容易地与孔雀石表面的Cu ²⁺位点反应，并且在没有Cu ²⁺离子的方解石表面仅发生了很小的吸附。