青海省祁连县红土沟-川刺沟金矿床矿石特征及其加工技术研究

Study on the ore features and processing technologies of HongtugouChuancigou gold deposit in Qilian county,Qinghai province

红土沟-川刺沟金矿床矿石矿物组成较简单,主要金属矿物为毒砂和黄铁矿,微量自然金及自然银,脉石矿物主要有绢云母、白云石、白云母和石英,金主要以可见金与次显微金存在,而又以次显微金为主,且多与黄铁矿、毒砂,石英等矿物密切连生。采用浮选→焙烧→氰化浸出联合流程试验,结果浮选金精矿经焙烧后氰化浸出率分别为70.45%和78.43%,浸出效果仍不能令人满意。但从不同提金工艺的试验结果看,该联合提金是比较好的一种工艺。

The major ore minerals in the Hongtugou-Chuancigou gold deposit are arsenopyrite and pyrite,with a small amount of native gold and native silver.The gangue minerals are mainly sericite,dolomite,muscovite and quartz.Gold is mainly present as invisible gold and submicroscopic gold,with the submicroscopic gold mainly existent in pyrite,arsenopyrite and quartz.According to the Flotation-RoastingCyanide Leaching experimental results,Cyanide Leaching rate of 70.45% and 78.43% respectively after gold concentrateroasting.The leaching effect is still unsatisfactory,but view of different gold extraction experimental results,this process is better.