河南某微细粒复杂难选金矿高效回收技术研究  

Research on efficient recovery technology for a microfine-grained complex refractory gold ore in Henan

作　　者：高迟明 梁毅 王卫军 张晓林 闫星昊 Gao Chiming;Liang Yi;Wang Weijun;Zhang Xiaolin;Yan Xinghao(Henan First Geological and Mineral Survey Institute Co.,Ltd.;Songxian Miaoling Gold Mine Co.,Ltd.)

机构地区：[1]河南省第一地质矿产调查院有限公司 [2]嵩县庙岭金矿有限公司

出　　处：《黄金》2024年第9期41-45,共5页Gold

基　　金：中国地质调查局发展研究中心项目(中地调研合同[2020]第296号);河南省地矿局地质科研类项目。

摘　　要：河南某微细粒复杂难选金矿原矿品位1.2 g/t左右,选矿回收率较低。为提升选矿回收率,提高经济效益,对浮选尾矿进行工艺矿物学研究。研究发现,浮选尾矿中载金矿物主要为黄铁矿,其次为石英和长石等硅酸盐矿物,黄铁矿粒度多小于0.038mm,主要呈细粒与脉石矿物连生或包裹于脉石矿物中,偶尔呈单体产出,单体解离度仅为4.60%,说明可以提高磨矿细度以进一步回收尾矿中金。开路试验和闭路试验发现,当磨矿细度-0.074 mm占比提高至85%,且对浮选药剂制度优化调整后,选矿回收率提高至85.86%,经济效益较好。A microfine-grained complex refractory gold ore in Henan has a grade of 1.2 g/t,but the recovery rate by beneficiation is low.To improve the recovery rate and economic benefits,a process mineralogy study was conducted on the flotation tailings.The study revealed that the gold-bearing minerals in the tailings are primarily pyrite,followed by silicate minerals such as quartz and feldspar.The pyrite particles are mostly smaller than 0.038 mm,typically occurring as fine particles intergrown with gangue minerals or encapsulated within them,with occasional monomeric occurrences.The monomer liberation degree is only 4.60%,indicating that increasing the grinding fineness could further recover the gold from the tailings.Open-circuit and closed-circuit tests showed that when the grinding fineness was increased to-0.074 mm accounting for about 85%,and the flotation reagent regime was optimized and adjusted,the recovery rate increased to 85.86%,leading to significant economic benefits.

关 键 词：微细粒 金矿 黄铁矿 磨矿细度 药剂制度 回收率 工艺矿物学 

分 类 号：TD953[矿业工程—选矿]