印尼某难处理金矿的金赋存状态研究  

Gold deportment study of a refractory gold ore in Indonesia

作　　者：苏妤芸 Su Yuyun(State Key Laboratory of Comprehensive Utilization of Low Grade Refractory Gold Resources,Shanghang 364200,Fujian,China;Xiamen Zijin Mining and Technology Co,Ltd,Xiamen 361101,Fujian,China)

机构地区：[1]低品位难处理黄金资源综合利用国家重点实验室,福建上杭364200 [2]厦门紫金矿冶技术有限公司,福建厦门361101

出　　处：《有色金属（选矿部分）》2023年第3期10-16,共7页Nonferrous Metals（Mineral Processing Section）

摘　　要：印尼某金矿,金品位8.61g/t,选矿浮选金回收率仅为56%,为查明金难选原因,对样品进行金赋存状态研究。结果表明:主要的载金矿物黄铁矿有多种产出形态,不同类型黄铁矿的含Au特征不同,其中微细卵状黄铁矿含Au极高,约250~1000g/t;针状黄铁矿含Au量100~300g/t;其他类型黄铁矿(草莓状、胶状、五角十二面体及立方体黄铁矿)含Au量仅0~25g/t。因此,微细卵状黄铁矿是最重要的载金矿物,其粒度微细,仅0~3μm,难解离难回收,是导致浮选金回收率低的主要原因。A gold mine in Indonesia with high gold grade is 8g/t,but gold flotation recovery rate only 56%,in order to find the cause of gold flotation difficulty,gold deportment was studied.The results show that,as the main gold-bearing mineral,pyrite has different forms.Fine-oval pyrite contains extremely high Au,about 250~1000g/t;needle pyrite contains Au 100-300 g/t;and other types of pyrite contain Au only between 0 and 25 g/t.Therefore,the fine-oval pyrite is the most important gold-bearing mineral,it has very fine particle size,only between 0-3 micron,difficult to dissociation,resulting in low flotation recovery rate,but using roasting preoxidation-cyanide method can get an ideal gold recovery effect.

关 键 词：难处理金矿 黄铁矿 LA-MC-ICPMS 金赋存状态 

分 类 号：TD91[矿业工程—选矿]