多硫化物微细粒浸染型金矿回收金试验研究  

Experimental study on gold recovery from polysulfide fine-grained disseminated gold mines

作　　者：周光浪 周东云[1] ZHOU Guanglang;ZHOU Dongyun(Yunnan Gold Mining Group Co.Ltd.,Kunming 650200)

机构地区：[1]云南黄金矿业集团股份有限公司,昆明650200

出　　处：《贵金属》2023年第1期47-53,共7页Precious Metals

摘　　要：为回收某含碳高砷高硫微细粒复杂难处金矿中的金,分别开展了全泥氰化浸出、浮选、焙烧、酸浸试验研究。结果表明,采用常规的全泥氰化浸出和浮选工艺,对金的回收效果均不好。采用“焙烧-全泥氰化浸出”工艺,受矿石焙烧后新产生的金属氧化物包裹金的影响,金浸出率仅有72.25%。经研究发现,采用酸溶方法,对焙砂进行加温酸浸预处理,可有效打开其被包裹的金,从而提高对金的回收。采用矿石“焙烧-酸浸-水洗-碱浸-全泥氰化浸出”联合工艺,金浸出率88.52%。In order to recover gold from a complex and refractory gold ore containing carbon,high arsenic and high sulfur,different processing methods including all-slime cyanidation leaching,flotation,roasting and acid leaching were adopted.The results show that sactisfactory recovery of gold can not be achieved via the conventional all-slime cyanidation leaching and flotation processes.Moreover,by using the process of“roasting-all-slime cyanidation leaching”,the gold leaching rate is only 72.25%,due to the influence of the newly generated metal oxides which will encapsulate gold after ore roasting.However,in this study,it has been found that this encapsulated problem can be overcome by acid-dissolving method to pre-treat calcine.Therefore,a combined process of“roasting-acid leaching-water washing-alkali leachingfull-slime cyanidation leaching”has been proposed to recover gold from a complex and refractory gold mines,with a gold leached rate of 88.52%.

关 键 词：难处理金矿 全泥氰化浸出 焙烧 酸浸 

分 类 号：TD953[矿业工程—选矿]