云南某含铜多金属锡矿石选矿试验研究

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

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。

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.