贵州某铜尾矿铜金回收浮选试验

贵州某铜尾矿-200目含量为40.17%,主要金属矿物有黄铜矿、黄铁矿、磁黄铁矿、斑铜矿,并伴生有少量的金、银。黄铜矿与黄铁矿、磁黄铁矿等共生关系密切,呈细粒、微细粒不均匀嵌布,部分粒度极细,难以单体解离;金主要为裸露金和黄铜矿包裹金。为了高效开发利用该二次资源,进行了铜金综合浮选回收试验。结果表明,在磨矿细度为-200目占80%的情况下采用1粗2精2扫、精矿2再磨至-325目占85%后2次精选、中矿顺序返回流程处理该试样,最终获得了铜、金、银品位分别为13.05%、18.75 g/t、229.62 g/t,铜、金、银回收率分别为58.70%、56.66%、43.72%的铜金精矿。

Recovery Flotation of Copper and Gold from Copper Tailings in Guizhou Province

For a copper tailing in Guizhou with fineness of 40.17% passing 200 mesh，its valuable minerals are mainly chalcopyrite，pyrite，pyrrhotite and bornite，with a small amount of gold and silver associated.Chalcopyrite，closely associated with pyrite，pyrrhotite，exists in fine or micro-fine form，some of which are too fine to be liberated.Gold mainly exists in form of natural gold or enclosed by chalcopyrite.In order to high-efficiently develop and utilize the secondary resources，the experiment on recovery of copper-gold is carried out.The results show that，at the grinding fineness of 80% passing 200 mesh，through the processes of one roughing-two cleanings-two scavengings，concentrate 2 regrounded to 85% passing 325 mesh and then through two cleanings，and middlings back to the flow-sheet in order，Cu-Ag concentrate with copper，gold，silver grade of 13.05%，18.75 g/t，229.62 g/t，and recovery of 58.70%，56.66%，43.72% is achieved respectively.