中文摘要：

黄金是重要的战略资源,金矿的选矿技术一直是重要的研究课题,近年来得到了极大的发展。以云南含金黄铁矿为研究对象,通过化学分析、物相分析、X射线衍射（XRD）分析和光学显微镜（OM）分析对原矿的工艺矿物学进行了研究。结果表明：原矿中金的品位为5.0g·t^-1,主要以硫化矿物包裹金的形式存在,硫化矿物主要是黄铁矿,脉石矿物主要是石英、云母和绿泥石。将黄铁矿作为金的载体矿物,通过浮选方法进行回收,在磨矿细度-0.074 mm占70%,碳酸钠调浆至矿浆p H 8左右,丁基黄药和25号黑药组合用量为140 g·t^-1的条件下,采用一次粗选一次扫选两次精选的浮选流程,获得的精矿金品位为30.59 g·t^-1,回收率为95.12%。金精矿的化学分析结果表明：银品位为191.75 g·t^-1,得到了综合回收;硫和铁的总量达到95.56%;砷品位为0.27%,相对较低。XRD分析表明,主要特征峰是黄铁矿的特征峰,含金黄铁矿得到了很好的富集。

英文摘要：

Gold is a kind of significant strategic resource. Gold mineral processing technology has been an important research topic and developed greatly in recent years. The process mineralogy of pyrite containing gold in Yunnan was investigated by chemical analy- sis, phase analysis, X-ray diffraction （XRD） analysis and optical microscopy （OM） analysis. The results showed that the grade of Au in the raw ore was 5.0 g·t^-1, and the gold mainly existed in sulfide minerals. The main sulfide mineral was pyrite and gangue minerals were quartz, mica and chlorite. Pyrite, a carrier mineral of gold, was recovered by flotation. The optimum flotation conditions were that occupancy of -0. 074 mm was 70% , pulp pH was near 8 with Na2 CO3 adjustment, the dosage of combined collectors butyl xan- thate and 25# aerofloat was 140 g·t^-1. A gold recovery of 95.12% with a concentrate grade of 30.59 g·t^-1 was achieved by a flow sheet of ＂one-stage roughing flotation, one-stage scavenging flotation and two-stage cleaning flotation＂. The chemical analysis results of gold concentrate indicated that the silver grade was 191.75 g·t^-1 , which was comprehensively recovered; the total amount of sulfur and iron reached 95.56% ; arsenic grade was 0.27% , which was relatively low. XRD analysis showed that the main characteristic peaks were pyrite, which meant that pyrite, the carrier mineral of gold, was well enriched.