影响新疆萨瓦亚尔顿金矿中金氰化浸出效果的矿物学因素

Mineralogical Factors Influencing Gold-Cyanide Leaching Performance in Sawaya'erdun Gold Mine Located in Xinjiang Uygur Autonomous Region

新疆萨瓦亚尔顿金矿属穆龙套型金矿,具有储量大、品位低、含碳质及难处理的特点。运用综合手段阐明了矿石的主要工艺矿物学特征,证明金矿物粒度细小及硫化物、砷化物本身载有显著数量的金是影响金氰化浸出效果的主要因素,而方金锑矿及碳质的存在对氰化指标的影响是次要的。因此,采用细磨浮选以尽可能回收金及硫化物、砷化物等载金矿物,然后采用金精矿焙烧以暴露为硫化物及砷化物包裹的金,所得焙砂进行氰化浸出,是提高金提取率的正确途径。

Sawaya＇erdun gold mine, located in the Xinjiang Uygnr Autonomous Region, belongs to the type of Mulongtao gold deposit with the common features of large reserve, low grade, being carbonaceous and refractory. The primary process mineralogical characteristics of the ore are revealed by comprehensive investigation. It is proved that the extreme fineness of gold mineral particle size and a remarkable amount of gold carried by sulfide and arsenide are the most important factors affecting cyanidation performance, while other factors are less significant. Thus, in order to improve gold recovery, it is a correct process route to adopt floatation under fine grinding to recover more gold minerals and gold--carrier minerals at first, then to roast the gold concentrate to expose the gold included in sulfides and arsenide, and finally to have the calcine go through the process of cyanide leaching.