山东某矿次显微-超次显微金选矿的实验研究  

Study on submicroscopic-ultra submicroscopic gold deposit in Shandong Province

作　　者：杨晓峰 汪仁建 李光岩 张传柱 Yang Xiaofeng;Wang Renjian;Li Guangyan;Zhang Chuanzhu(School of Mining Engineering,Heilongjiang University of Science&Technology,Harbin 150022,China;Shandong Gold Jinchuang Group Co.Ltd.,Penglai 265600,China)

机构地区：[1]黑龙江科技大学矿业工程学院,哈尔滨150022 [2]山东黄金金创集团有限公司,山东蓬莱265600

出　　处：《黑龙江科技大学学报》2019年第6期648-652,共5页Journal of Heilongjiang University of Science And Technology

摘　　要：针对山东某碳质板岩型含Au 3.8 g/t的矿石,采用常规氰化钠浸出金率仅为5.20%的现象,运用电子探针及电子显微镜等手段分析金的赋存状态,通过调整剂和捕收剂的遴选实验研究载金矿物的回收效果。结果表明:金呈次显微-超次显微结构存在,金集合体粒度仅为0.065~0.044μm,且矿石中裸露的自然金仅占11.87%,其余部分被硫化物及氧化物包裹;采用硅酸钠+硫化钠作为调整剂,730作为载金矿物的捕收剂,获得浮选金精矿含Au 50.40 g/t,回收率85.13%,精矿品位和回收率得到显著提高。This paper is aimed at addressing the leaching rate of Au of only 5.20%as occurs when conventional sodium cyanide solution is used to heap-leach gold deposit of carbonaceous slate type with content of Au 3.80 g/t in Shandong Province.Research shows that Au included by gold-bearing mineral,and submicroscopic-ultra submicroscopic structure of Au are main contributor to the lower leaching rate.Native gold with bare state in the ore is 11.87%,and the others are included by sulfide and oxide.Pyrite,the main gold-bearing mineral,has an occupation rate of Au of 92.06%,and the size of Au aggregates of 0.065-0.440μm,together with more clay minerals and a little amorphous carbonaceous.The study involves enriching gold-bearing minerals using flotation process according to ore properties;performing detailed research on regulator and collector;and thereby obtaining the concentrate content of Au 50.40 g/t and recovery rate of 85.13%by using sodium silicate and sodium sulfide for regulator,730 for collector.

关 键 词：金矿 品位 回收率 次显微-超次显微 

分 类 号：TD953[矿业工程—选矿]