摘要
考察了高岭土、绿泥石、白云石和褐铁矿4种常见易泥化矿物对氰化浸出过程的影响,发现褐铁矿和白云石在细磨时形成的次生矿泥比原生矿泥具有更强的吸附已溶金能力,使浸出率降低。研究了原矿经粗磨-磁选后易泥化矿物的分布,对云南某金铁氧化矿采用"粗磨-分类磁选-分组氰化浸出"的新工艺,有效减少了次生矿泥的生成,与"细磨-氰化浸出-磁选"的传统工艺相比,金浸出率由85.26%提高到93.05%,铁精矿回收率由41.20%提高到70.86%。
The influence of four common clay minerals,kaoline,chlorite,dolomite and limonite,on goldcyanidation were investigated.The results indicated that the adsorption contributed to the total loss of goldfor the over-grinded limonite and dolomite clays.The distribution of the clay minerals after coarsegrinding and magnetic separating process was tested.A novel combination process involving coarsegrinding,classifying by magnetic separation,leaching,was proposed to eliminate the adverse effects ofsecondary slimes.Compared with the traditional process of fine grinding-cyanidation-magnetic separation,this new technique increased the gold extraction rate from85.26%to93.05%and the iron recovery ratefrom41.20%to70.86%.
作者
宋宝旭
邱显扬
胡真
李沛伦
邹坚坚
付华
SONG Baoxu;QIU Xianyang;HU Zhen;LI Peilun;ZOU Jianjian;FU Hua(State Key Laboratory of Rare Metals Separation and Comprehensive Utilization,Guangdong Provincial Key Laboratory of Development and Comprehensive Utilization of Mineral Resource,Guangdong Institute of Resources Comprehensive Utilization, Guangzhou 510651, China)
出处
《贵金属》
CAS
CSCD
北大核心
2017年第1期53-59,共7页
Precious Metals
关键词
有色金属冶金
矿泥
磨矿细度
氰化浸出
金
铁
回收
nonferrous metallurgy
clay minerals
grinding fineness
cyanidation
gold
iron
recovery
