摘要
针对某含铜1.13%、锌1.98%、硫17.85%、银71 g/t、镉90 g/t、铟21 g/t,目的矿物主要为黄铜矿、闪锌矿、黄铁矿的高硫铜锌矿,进行了组合抑制剂低碱度浮选回收黄铜矿、闪锌矿和重选回收黄铁矿试验.试验结果表明:在磨矿细度-0.074 mm占 90%条件下,铜浮选作业采用氧化钙+硫化钠抑制黄铁矿、硫酸锌+焦亚硫酸钠抑制锌矿物,锌浮选作业采用腐殖酸钠+氧化钙抑制黄铁矿,获得铜品位 23.59%、铜回收率 92.85%,含银、镉、铟分别为 328 g/t、228 g/t、142 g/t的铜精矿;锌品位 45.81%、锌回收率 80.60%,含银、镉、铟分别为 796 g/t、2 000 g/t、287 g/t的锌精矿;摇床试验获得硫品位 42.34%、作业回收率 68.04%的硫精矿;黄铁矿组合抑制剂发挥协同作用减少了氧化钙用量,浮选pH值降至 10以下.研究成果为该类型矿石的工业开发奠定了基础.
Abstract
A low-alkalinity beneficiation is studied on a high sulfur copper-zinc ore containing 1.13%copper,1.98%zinc,17.85%sulfur,71 g/t silver,90 g/t cadmium and 21 g/t indium,which the main target minerals are chalcopyrite,sphalerite and pyrite.A gravity concentration is carried out.The results show that at the grinding fineness of-0.074 mm 90%,copper flotation operation using CaO+NaS2 to inhibit pyrite,taking ZnSO4+Na2S2O5 as zinc minerals'inhibitors,and zinc flotation operation using C9H8Na2O4+CaO to inhibit pyrite.The copper concentrate with 23.59%of Cu grade and 92.85%of Cu recovery rate,which containing 328 g/t Ag,228 g/t Cd,and 142 g/t In.The zinc concentrate with 45.81%of Zn grade and 80.60%of Zn recovery rate,which containing 796 g/t Ag,2 000 g/t Cd,and 287 g/t In.The shaking table test obtains sulfur concentrate with a sulfur grade of 42.34%and an operational recovery rate of 68.04%.The synergistic effect of pyrite combination inhibitors reduce the CaO dosage,and the flotation pH value drops below 10.The research results lay a good foundation for the industrial development of this ore.
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