针对腾冲某氧化锌矿嵌布粒度细、含泥量高的技术难题进行了选矿实验研究. 结果表明，该矿中锌品位为6.65%、铁品位为12.31%，锌氧化率达92.83%，锌主要以异极矿形式存在，铁主要以磁铁矿形式存在. 经多个实验流程对比分析，采用预先洗矿(洗去小于37 mm粒级的颗粒)、沉砂磨矿后先磁选后浮选的流程，确定最佳磨矿细度为小于75 mm的颗粒达91.74%，弱磁选电流为4 A，粗选药剂用量为碳酸钠2 kg/t、六偏磷酸钠2 kg/t、硫化钠13 kg/t、KPR 2 kg/t. 采用闭路选矿流程，得到锌品位为27.89%、回收率75.26%的氧化锌精矿和铁品位为61.25%、回收率51.65%的铁精矿. 通过Zeta电位分析捕收剂KPR与异极矿的作用机理.

Tengchong zinc oxide ore was studied for the technological problems of fine mineral dissemination and high content slime. The results show that the grade of zinc in the ore is 6.65% and the iron 12.31%. The oxidation date of zinc is up to 92.83%, calamine is the main existing form of the zinc and iron mainly in the form of magnetite. After comparative experiments of multiple trials processes, it is determined that the processes of washing are used in advance for removing the particles less than 37 μm, and the sand grinding and magnetic flotation separation are followed. The optimum particle fineness of 91.74% less than 75 μm is fixed, and the current of low intensity magnetic separation is 4 A. The roughing reagent system consists of sodium carbonate 2 kg/t, sodium hexametaphosphate 2 kg/t, sodium sulfide 13 kg/t and KPR 2 kg/t. By the closed circuit experiments, the zinc concentrate of zinc grade 27.89% and the recovery rate of 75.26%, and the iron concentrate of iron grade 61.25% and the recovery rate of 51.65% are obtained. And the functional mechanism of KPR with calamine is also analyzed based on the Zeta potential measurement.