青海某少硫化物难选金矿选矿实验  

Test of Flotation Technology for a Low-sulfide Refractory Gold Ore from Qinghai

作　　者：明平田 马生萍 丁超 王振[3] MING Pingtian;MA Shengping;DING Chao;WANG Zhen(The Engineering and Technology Research Center for the Development of Gold Mining Resources in Qinghai Province,Dulan 816100,Qinghai,China;Dulan Jinhui Mining Co.,Ltd.,Golmud 816100,Qinghai,China;Southwest University of Science and Technology,Mianyang 621010,Sichuan,China)

机构地区：[1]青海省金矿资源开发工程技术研究中心,青海都兰816100 [2]都兰金辉矿业有限公司,青海格尔木816000 [3]西南科技大学,四川绵阳621010

出　　处：《矿产综合利用》2024年第6期161-168,共8页Multipurpose Utilization of Mineral Resources

基　　金：国家重点研发计划国际合作项目(2023YFE0104100);四川省区域创新合作项目(2022YFQ0074)。

摘　　要：这是一篇矿物加工工程领域的论文。青海某微细-超微细含碳、砷难选金矿为糜棱岩中的挤压性构造破碎带中的中高温热液蚀变岩型金矿石,主要硫化物为黄铁矿(含量3.51%),其次为毒砂(含量1.10%),泥质矿物含量37%。金主要呈显微、超显微分散状态包裹于黄铁矿、毒砂等硫化矿物中,脉石及褐铁矿包裹金分别占14.43%、8.20%,小于0.005 mm的金粒占81.04%。本文以工艺矿物学研究为基础,进一步优化浮选工艺参数及药剂制度,并开展了强力搅拌和选择性磨矿联合工艺研究,一定程度减轻了矿石细磨与泥化的矛盾问题,获得了金精矿金品位33.06 g/t、金回收率为85.70%实验指标,在原工艺指标上实现较大突破。This is an article in the field of mineral processing engineering.A microfine-ultramicron refractory gold ore containing carbon and arsenic is a medium-high temperature hydrothermal altered rock type gold ore in the compressive structural fracture zone of mylonite in Qinghai Province.The main sulfide is pyrite(3.51%content),followed by arsenopyrite(1.10%content)and argillaceous mineral content 37%.Most of the gold is microscopically or ultramicroscopically dispersed in sulfide minerals such as pyrite and arsenopyrite.Gangue and limonite contain 14.43%and 8.20%of gold,respectively,and 81.04%of gold less than 0.005 mm.Based on the research of process mineralogy,this paper further optimized the flotation process parameters and reagent system,and carried out the research of the combined process of strong agitation and selective grinding,which alleviated the contradiction between fine grinding and slime of ore to a certain extent,and obtained the test indexes of gold grade of 33.06 g/t and gold recovery of 85.70%,achieving a great breakthrough in the original process index.

关 键 词：矿物加工工程 难选金矿 少硫化物 强力搅拌 中矿再磨再选 金回收率 

分 类 号：TD953[矿业工程—选矿]