工艺矿物学自动分析仪(BPMA)在影响金氰化浸出的工艺矿物学因素研究中的应用  

Application of automated process mineralogy analyzing system in the study of process mineralogical factors affecting gold cyanide leaching

作　　者：温利刚 付强 贾木欣 王清 蔡明明 WEN Ligang;FU Qiang;JIA Muxin;WANG Qing;CAI Mingming(BGRIMM Technology Group,Beijing 102628,China;State Key Laboratory of Process Automation in Mining&Metallurgy,Beijing 102628,China;Beijing Key Laboratory of Process Automation in Mining&Metallurgy,Beijing 102628,China;Metallurgical Laboratory Branch of Shandong Gold Mining Technology Co.,Ltd.,Yantai 261441,China)

机构地区：[1]矿冶科技集团有限公司,北京102628 [2]矿冶过程自动控制技术国家重点实验室,北京102628 [3]矿冶过程自动控制技术北京市重点实验室,北京102628 [4]山东黄金矿业科技有限公司选冶实验室分公司,山东烟台261441

出　　处：《中国矿业》2021年第S02期195-200,共6页China Mining Magazine

基　　金：国家科技支撑计划项目资助(编号:2012BAB19B01);国家自然科学基金项目资助(编号:51734005)。

摘　　要：金的赋存状态和工艺矿物学特性是提高金回收率的根本因素。青海某氰渣浮选尾矿中金品位偏高,达3.2 g/t,损失严重。为查明金损失的原因,利用BPMA-SEM-EDS等手段对尾矿进行了深入的研究。结果表明:金矿物种类相对简单,主要为自然金,含少量银金矿;金矿物的嵌布粒度微细,绝大多数嵌布粒度在5μm以下;裸露金占有率为15.26%,包裹金占有率为84.11%,且绝大多数被黄铁矿包裹;样品中存在少量砷酸盐类矿物,可能会影响金的浸出。研究结果说明,提高磨矿细度和适当延长浸出时间,有利于金的浸出;通过浮选富集黄铁矿可以富集金,再进一步细磨,有利于金的进一步回收;重视脱除砷的影响,有利于提高金的浸出指标。The occurrence state and process mineralogical characteristics of gold are the fundamental factors to improve gold recovery.The gold grade in a cyanide residue flotation tailings in Qinghai is high,up to 3.2 g/t,the loss is serious.In order to find out the cause of gold loss,the tailings are deeply studied by means of BPMA-SEM-EDS.The results show that the types of gold deposits are relatively simple,mainly natural gold,with a small amount of silver gold.The embedded particle size of gold ore is fine,and most of the embedded particle size is less than 5 microns.The percentage of bare gold is 15.26%,and that of wrapped gold is 84.11%,and most of them are wrapped by pyrite.There is a small amount of arsenate minerals in the sample,which may affect the leaching of gold.The results show that increasing grinding fineness and appropriately prolonging leaching time are conducive to gold leaching.The enrichment of pyrite by flotation can enrich gold,and then further fine grinding is conducive to the further recovery of gold.Paying attention to the effect of arsenic removal is conducive to improve the leaching index of gold.

关 键 词：工艺矿物学 微细粒金 赋存状态 矿物定量 BPMA 

分 类 号：P618.11[天文地球—矿床学]