青海某难选金锑矿石综合回收选矿试验研究  

Beneficiation Research on Comprehensive Recovery of a Refractory Au-Sb Ore in Qinghai

作　　者：孙晓华[1] 吴天娇[2] 王勇海[2] 陈维青[2] 

机构地区：[1]青海省地质矿产测试应用中心,青海西宁810008 [2]西北有色地质研究院,陕西西安710054

出　　处：《矿产综合利用》2011年第5期19-23,共5页Multipurpose Utilization of Mineral Resources

摘　　要：青海某金矿石属少硫化物石英斑岩型微细浸染状金矿石,金粒度小于0.005mm,主要包裹在硅酸盐、碳酸盐以及含砷黄铁矿等硫化物中,有害元素砷含量较高,属于难选冶矿石。针对该矿石性质进行了原矿直接氰化浸金,原矿氧化焙烧-氰化浸金及浮选等工艺流程的对比试验。结果表明,锑金优先浮选-金精矿抑砷浮选是处理该矿较为合理的工艺。锑、金分别经过两次粗选、两次扫选、两次精选,可获得锑品位为57.00%,锑回收率为62.70%的锑精矿,金品位为32.35g/t,金回收率为73.28%的金精矿。A fine-grained disseminated gold ore in Qinghai belongs to quartz porphyry type ore with low content of sulphide,the gold size of which is less than 0.005mm,mainly wrapped in silicate,carbonate and arsenic pyrite,furthermore,the content of toxic arsenic element is very high.Therefore,it′s a refractory ore.Directed at these properties,contrastive experiments of direct cyanide leaching of gold from raw ore and oxidizing roasting raw ore—cyanide leaching of gold and floatation were carried out.The results show that the technology of selective flotation of Au-Sb—flotation of depressing arsenic was the suitable one.Through two roughing flotation,two scavenging flotation and two cleaning flotation,the antimony concentrate of 57.00%Sb with the recovery of 62.70% and the gold concentrate of 32.35g/t Au with the recovery of 73.28% were obtained respectively.

关 键 词：难选金矿 包裹金 微细粒浸染状 金精矿抑砷 

分 类 号：TD952[矿业工程—选矿]