低品位双重难处理金矿石工艺矿物学及浸金影响因素  

Process Mineralogy of Low-Grade Double Refractory Gold Ore and Influencing Factor on Gold Leaching

作　　者：杨洪英[1] 巩恩普[2] 杨立[1] 

机构地区：[1]东北大学材料与冶金学院,辽宁沈阳110004 [2]东北大学资源与土木工程学院,辽宁沈阳110004

出　　处：《东北大学学报（自然科学版）》2008年第12期1742-1745,共4页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金资助项目(5067402950274024);国家高技术研究发展计划项目(2006AA06Z127);教育部高等学校博士学科点专项科研基金资助项目(20060145015);辽宁省自然科学基金资助项目(20052030)

摘　　要：试验所用矿石来自我国云南某金矿,该矿含金2.4 g/t,砷0.97%,碳1.47%.它是典型的低品位含碳双重难处理金矿石,浮选精矿-氰化提金,金浸出率为10.43%;浮选精矿-焙烧-氰化工艺,金浸出率为46.52%,属于极难浸金矿.矿石主要金属矿物为黄铁矿、毒砂.脉石矿物主要为石英、绢云母、白云石、方解石、伊利石黏土矿物等.金的赋存状态绝大多数是"不可见金",主要为次显微、超显微的包裹金以及胶体金.金主要包裹于毒砂和黄铁矿晶体中.矿石中金矿物主要为自然金,少为银金矿.矿石金回收率低的原因主要是包裹金,矿石含砷、碳质以及黏土矿物.The samples used were from a gold mine in Yunnan Province, which are all of the typical of low-grade double refractory gold ore containing 2.4 g/t Au, 0.97 wt% As and 1.47 wt% C. The leaching rate of gold as a result of flotation concentrates and extraction by cyanidation is 10.43 %, and it becomes 46.52 % if the extraction process is roasting-cyanidation, which is thus referred to as extraordinary refractory gold ore in which the metallic minerals are mainly the pyrite and arsenopyrite and gangue minerals mainly cover the quartz, sericite, dolomite, calcite, illtie and clay mineral. Most of the occurrence state of gold in such a low-grade double refractory ore is invisible, i.e. mainly the inclusion gold or colloidal gold in sub-micro or super-micro state, the natural gold particles included in the pyrite and arsenopyrite crystals are the majority with electrum in minority. The influencing factors on low gold recovery are the inclusion gold, ore containing arsenic, carbonaceous matter and clay minerals.

关 键 词：低品位 双重难处理金矿石 碳质 工艺矿物学 浸金 

分 类 号：TF831[冶金工程—有色金属冶金]