Tricarboxystarch (sodium salt), also known as TCSS, has been studied as a selective depressant of pyrite in chalcopyrite flotation using xanthate as a collector. In microflotation, tricarboxystarch achieved strong and selective depression of pyrite flotation than chalcopyrite under weakly acidic conditions. In this study, the performance of tricarboxystarch as a pyrite depressant was further investigated by using it in batch flotation experiments on sulfur-rich copper sulfide ore. The effects of the addition of tricarboxystarch on improving Cu grade and reducing S grade were investigated at different pH of solution and different doses of reagent. The overall batch experiment consisted of bulk roughing and cleaning flotation, followed by the removal of pyrite with the addition of depressant. Using tricarboxystarch as a depressant, a new environmentally friendly closed-circuit beneficiation process for a sulfur-rich copper ore was also designed in this work. The results of batch flotation experiments show that the addition of a low dose of tricarboxystarch under weakly acidic conditions (pH 6) yields a very high grade copper concentrate containing approximately 21.85% Cu and 33.78% S. As an inexpensive and eco-friendly polymer, tricarboxystarch usage may significantly reduce the reagent cost and potential environmental impact in the mineral industry.

三羧基淀粉（钠盐），也称为TCSS，已被研究为使用黄药作为捕收剂的黄铜矿浮选中黄铁矿的选择性抑制剂。在微浮选中，在弱酸性条件下，三羧基淀粉比黄铁矿对黄铁矿浮选的抑制作用强且选择性强。在这项研究中，通过在富硫硫化铜矿石的分批浮选实验中使用三羧基淀粉来进一步研究其作为黄铁矿抑制剂的性能。研究了在不同pH值溶液和不同剂量试剂下，添加三羧基淀粉对提高Cu等级和降低S等级的影响。整个批处理实验包括批量粗磨和清洁浮选，然后通过添加抑制剂去除黄铁矿。用三羧基淀粉作为抑制剂 在这项工作中，还设计了一种用于富硫铜矿的新型环保闭路选矿工艺。批量浮选实验的结果表明，在弱酸性条件下（pH 6）加入低剂量的三羧基淀粉可得到非常高品位的铜精矿，其中铜含量约为21.85％，S含量为33.78％。作为一种廉价且环保的聚合物，三羧基淀粉的使用可以显着降低试剂成本并降低矿物行业的潜在环境影响。