内蒙古柴胡栏子金矿石的工艺矿物学研究

为给柴胡栏子金矿原选矿流程中全泥氰化工艺的改造提供可行的理论支撑,采用化学分析、矿物自动分析仪分析、扫描电子显微镜分析、X射线能谱分析、光学显微镜分析等测试手段,对内蒙古赤峰柴胡栏子金矿进行详细的工艺矿物学研究,明确其化学组成、矿物组成、粒度分布及有用矿物的嵌布特征关系。结果表明:该金矿中金品位为2.83 g/t。金主要以银金矿的形式存在,主要脉石矿物为石英、绿帘石、绿泥石、绢云母、方解石。金矿中的矿物组成十分复杂且脉石矿物嵌布粒度极细,属于细粒石英脉型金矿。银金矿以包裹金、粒间金和裂隙金的形式产出。黄铁矿和磁黄铁矿为金的主要载体矿物,分布率分别为41.61%、23.77%。综合工艺矿物学结果,最终提出了采用分段磨矿,重—浮联合回收金的绿色环保选矿工艺流程。

Study on Process Mineralogy of Gold Ore in Chaihulanzi in Inner Mongolia

In order to provide theoretical support for a modification of the original process of cyanidation leaching process,the chemical composition,mineral composition,particle size distribution and dissemination characteristics of gold ore in Chaihulanzi were detailed using chemical analysis,microscopy，automatic mineral analyzer,scanning electron microscopy,X-ray energy spectrum analysis and optical microscope analysis.The results indicated that the Au contents of the ore was 2.83 g/t,and the gold mainly exists in the form of electrum.The main gangue minerals were quartz,epidote,chlorite,sericite and calcite.The mineral composition of gold ore was complexed,and the distribution of gangue minerals was very fine,which belonged to quartz vein type gold deposits.The occurrences of electrum in the gold mine was wrapped gold,intergranular gold and fissure gold.Pyrite and pyrrhotite were the main gold bearing minerals with the relative content of 41.61% and 23.77%,respectively.Based on the results of process mineralogy analysis,an environmental protection process of stage grinding with gravity separation flotation combined process was proposed.