云南某含铜多金属锡矿石选矿试验研究

云南某含铜多金属锡矿石中含铜0.79%、银38 g/t、铟43.6 g/t和锡0.56%，其主要矿物有黄铜矿、黄铁矿、斑铜矿和锡石。根据矿样性质，对其进行试验研究，最终确定采用优先浮铜—浮选脱硫—磁选除铁—重选选锡的联合工艺流程。结果表明：浮铜工艺可获得含铜21.98%、银694.5 g/t、铟265.17 g/t，回收率分别为93.14%、65.76%和19.31%的铜精矿。浮锡工艺可获得含锡35.58%、铟465.24 g/t，回收率分别为77.42%和46.52%的锡精矿，实现了铜、银、铟和锡的综合回收利用。

Experimental Research on Beneficiation of Copper-bearing Tin Polymetallic Ore in Yunnan

A tin-copper-bearing polymetal tin ore in Yunnan contains 0.79% of copper, 38 g/t of silver, 43.6 g/t of indium, and 0.56% of tin. Its main minerals are chalcopyrite, pyrite, bornite and cassiterite. According to the properties of ore samples, the exploration and experimental study were carried out. The combined process of copper floatation-desulfurization flotation-magnetic separation iron removal-gravity tin separation was finally determined. The results show that the copper float process can obtain copper concentrates containing 21.98% copper, 694.5 g/t silver, and 265.17 g/t indium, and recovery rates of 92.92%, 66.2%, and 19.62%, respectively. The gravity separation can obtain tin concentrates containing 35.58% tin and 465.24 g/t indium, and the recovery rates of 77.42% and 46.52%, respectively, which realizes the comprehensive recycling of copper, silver, indium and tin.