国外某难选高砷铜金矿石选冶联合工艺研究  

Combined Beneficiation and Metallurgical Process Study of a Refractory Copper-Gold Ore Bearing High Arsenic Abroad

作　　者：李绍英 赵留成[1,2,3] 于晓东 赵礼兵[1,2,3] 白丽梅 LI Shaoying;ZHAO Liucheng;YU Xiaodong;ZHAO Libing;BAI Limei(School of Mining Engineering,North China University of Science and Technology,Tangshan 063210,China;Key Laboratory of Mining Development and Safety Technology of Hebei Province,Tangshan 063210,China;Collaborative Innovation Center of Green Development and Ecological Restoration of Mineral Resources,Tangshan 063210,China)

机构地区：[1]华北理工大学矿业工程学院,河北唐山063210 [2]河北省矿业开发与安全技术重点实验室,河北唐山063210 [3]矿产资源绿色开发与生态修复协同创新中心,河北唐山063210

出　　处：《金属矿山》2023年第2期101-106,共6页Metal Mine

基　　金：河北省高等学校科学技术研究项目(编号:ZD2020132,ZD2022128);河北省自然科学基金项目(编号:E2021209084,E2022209079)。

摘　　要：国外某高砷铜金矿石金、铜、砷品位分别为3.46 g/t、1.028%、1.16%,为高效开发利用该矿石资源,进行了系统的浮选试验以及加压预氧化、氰化浸金试验研究,确定采用混合浮选—铜砷(硫)分离—硫砷精矿加压预氧化氰化浸金—尾矿直接氰化的选冶联合工艺。试验结果表明:原矿在磨矿细度为-0.074 mm占85%时,经1粗2扫混合浮选,混浮精矿再磨至-0.038 mm占85%,经1粗2精1扫铜砷(硫)分离获得铜、金、砷品位分别为22.49%、27.43g/t、0.42%,铜、金、砷回收率分别为87.99%、35.12%、1.88%的铜精矿以及铜、金、砷品位分别为0.47%、9.03 g/t、5.90%,铜、金、砷回收率分别为6.03%、37.93%、86.57%的硫砷精矿;采用加压预氧化—氰化浸金工艺处理硫砷精矿,金对原矿的回收率达到36.19%;采用直接氰化浸金工艺处理混合浮选尾矿,金对原矿的回收率为10.77%;铜和金的选冶综合回收率分别达到87.99%、82.08%,实现了矿石中铜和金的有效回收。The grade of Au,Cu and As of a copper-gold ore is 3. 46 g/t,1. 028% and 1. 16% respectively. It belongs to refractory copper-gold ore bearing high arsenic. In order to develop the ore high efficiently,systematic tests of flotation,pressure pre-oxidation and gold cyanidation were carried out. Finally,the combined beneficiation-metallurgy process of bulk flotationcopper and arsenic(sulphur) separation-pressure pre-oxidation-cyanidation of arsenic and sulphur concentration-cyanidation of flotation tailings,is adopted to treat the copper-gold ore bearing arsenic. The results show that,when grind fineness is 85% less than 0. 074 mm,through bulk flotation with one rougher and two scavenger,regrinding of bulk concentrate(-0. 038 mm 85%),separation of copper and arsenic(sulphur) with one rougher,two cleaning and one scavenger,the final flotation concentrate is achieved,the grade of Cu,Au and As is 22. 49%,27. 43 g/t,0. 42% respectively,and the recovery of Cu,Au and As is 87.99%,35. 12%,1. 88% respectively. In addition,sulphur and arsenic concentrate is also obtained,the grade of Cu,Au and As is 0. 47%,9. 03 g/t,5. 90% respectively,and the recovery of Cu,Au and As is 6. 03%,37. 93% and 86. 57% respectively. The pressure peroxidation-cyanidation process is adopted to treat concentrate of arsenic and sulphur,the gold recovery for raw ore achieves to 36. 19%. Direct cyanidation is adopted to treat flotation tailings,the gold recovery for raw ore achieves to 10. 77%.The copper and gold recovery of combined beneficiation-metallurgy process is 87. 99% and 82. 08%. The effective recycling of copper and gold is realized.

关 键 词：高砷金铜矿 混合浮选 加压预氧化 氰化浸出 选冶联合工艺 

分 类 号：TD923[矿业工程—选矿]