甘肃某细粒浸染型金矿石选矿试验研究

摘要

甘肃某细粒浸染型金矿石中金主要以包裹金形态存在,且载金矿物黄铁矿与脉石矿物连生关系复杂.针对该矿石的性质,进行了选矿试验研究.其结果表明:在最佳试验条件下,采用阶段磨矿-阶段浮选工艺,可获得金品位30.17 g/t、金回收率81.23%的较好指标;硫精矿经氧化焙烧—氰化浸出,金对原矿的回收率为6.96%,金总回收率达88.19%.%Mineral processing test was carried out for a fine grain disseminated gold ore from Gansu Province.The gold-carrying mineral is pyrite and it is connected with gangue minerals in a complex way.The test results under opti-mal test conditions,a stage grinding-stage flotation process can obtain a gold grade of 30.17 g/t and a gold recovery rate of 81.23 %.Sulfur concentrates go through roasting-cyanide leaching process,the recovery of primary gold ores is 6.96 %and the total recovery rate of gold is 88.19 %.