秦岭地区大桥金矿金的赋存状态及难选性因素探讨  

Discussion on the Occurrence State and Refractory Factors of Gold in Daqiao Gold Deposit,Qinling Area

作　　者：常静 石磊[1] 李玺 钟财丽 王艳[1] Chang Jing;Shi Lei;Li Xi;Zhong Caili;Wang Yan(Sichuan Xi Ye Testing Technology Co.,Ltd(SIMGE),Chengdu,Sichuan,China)

机构地区：[1]四川西冶检测科技有限公司(四川省冶金地质勘查院),四川成都610000

出　　处：《矿产综合利用》2023年第3期175-180,共6页Multipurpose Utilization of Mineral Resources

摘　　要：这是一篇工艺矿物学领域的论文。大桥金矿为秦岭地区发现的超大型金矿,但在开采原生矿过程中发现,采用传统选矿工艺进行选矿,金的回收率极低,确定其为难选性矿床,本文旨在探究矿床内金的赋存状态及难选性因素。通过显微镜下鉴定、扫描电镜(SEM)、电子探针(EPMA)及化学分析等,结合选矿实验,发现金主要以自然金、银金矿形式存在于硅质角砾岩中。金和载金矿物粒度均极为细小,使得在选矿过程中,在研磨粒度极细的情况下,两者仍不能高程度完全解离,成为了制约矿床可选性的主要原因,另见该矿含较多碳质存在,成为了制约矿床可选性的另一原因。This is a paper in the field of process mineralogy.Daqiao gold mine is a super-large gold mine discovered in the Qinling region,but in the process of mining primary ore,it is found that the recovery rate of gold is very low by using the traditional beneficiation process,so the refractory pre-deposit is determined,this paper aims to investigate the occurrence state and refractory factors of gold in the deposit.Through microscopic identification,SEM,EPMA,and chemical analysis,combined with mineral processing tests,it is found that gold mainly exists in siliceous breccia in the form of natural gold and silver gold.The granularity of gold and gold-bearing minerals is very small,so that in the process of beneficiation,the sandal can not be dissociated to a high degree under the condition of very fine grinding granularity,which is the main reason that restricts the beneficiability of the ore deposit,it is also found that the ore contains more carbon,which is another reason restricting the ore beneficiability.

关 键 词：工艺矿物学 大桥金矿 自然金 赋存状态 难选性因素 

分 类 号：TD982[矿业工程—选矿]