为充分了解某金矿矿石性质，制订合理的选矿方案，通过化学分析、偏光显微镜、人工重砂、电子探针等手段对矿石进行系统的工艺矿物学研究。结果表明：矿石中有价元素主要为金，品位为4.08 g/t。金属矿物主要为黄铁矿、胶状黄铁矿、白铁矿、毒砂等，非金属矿物主要为石英。金主要为自然金，并以包裹金为主，其次为粒间金和裂隙金；与黄铁矿嵌布关系密切，脉石矿物次之。金矿物粒度多小于 0.037 mm，该矿石属微细粒浸染型金矿石。基于工艺矿物学研究结果，制订了2种浮选方案，通过对比发现，原矿粗磨—粗精矿再磨方案优于原矿一段细磨。闭路试验获得金品位为43.39 g/t、金回收率为95.08 %的选别指标。  

To fully understand the characteristics of a certain gold ore and develop an appropriate beneficiation scheme, a systematic process mineralogical study was conducted using chemical analysis, polarized light mieroscopy. manual panning, and electron probe techniques. The results showed that the valuable element in the ore is gold, with a grade of 4.08 g/t. The metallic minerals are mainly pyrite, colloform pyrite, marcasite, and arsenopyrite, while the non-metallic mineral is mainly quartz. Gold occurs mainly as native gold, predominantly in the form of inclusion gold. followed by intergranular gold and fissure gold; it is closely associated with pyrite, and to a lesser extent with gangue minerals. Most of the gold particles are smaller than 0.037 mm, classifying the ore as a microfine-grained disseminated gold ore. Based on the results of the process mineralogical study, 2 flotation schemes were developed. A comparison showed that the scheme involving coarse grinding of the raw ore followed by regrinding of the roughing concentrate performed better than one-stage fine grinding of the raw ore. The closed-circuit test produced gold concentrate with a grade of 43.39 g/t and a gold recovery rate of 95.08%.