有色金属硫化矿矿石性质复杂，且含有多种有价元素，使用单一捕收剂难以获得理想指标。而组合捕收剂能够发挥协同作用，有利于实现复杂多金属硫化矿资源的高效分离与综合回收。针对某低品位金矿石开展了详细的工艺矿物学分析，并进行提金试验研究。研究结果表明，该矿石中金矿物粒度细且分散分布于载金矿物中。采用机柱联合浮选工艺处理该低品位难选矿石，添加组合捕收剂 XTB和组合起泡剂 XTQ可显著提高金的浮选指标。在闭路试验中，磨矿细度为-0.074 mm条件下，获得精矿金品位为 38.00 g/t、金回收率为 76.41 %。该工艺实现了矿石中有价元素的高效回收和矿产资源的综合利用。

Non⁃ferrous metal sulfide ores exhibit complex mineralogical properties and contain multiple valuableelements, making it difficult to achieve ideal indicators using a single collector. Combined collectors can produce syner⁃gistic effects, facilitating the efficient separation and comprehensive recovery of complex polymetallic sulfide oreresources. In this study, a detailed process mineralogy analysis was conducted on a low⁃grade gold ore, followed byexperimental research on gold extraction. Results indicate that the gold minerals in the ore are fine⁃grained anddispersed within gold⁃bearing minerals. By employing a combined machine-column flotation process to treat thislow⁃grade refractory ore, along with the addition of the combined collector XTB and the combined frother XTQ, theflotation performance of gold is significantly improved. In closed⁃circuit tests with a grinding fineness of −0.074 mm, agold concentrate with a grade of 38.00 g/t and a recovery of 76.41 % is obtained. This process achieves efficient re⁃covery of valuable elements and maximizes the utilization of mineral resources.