某金矿石为少硫化物金矿石，矿石中金矿物粒度细小，微细粒金矿物占89．15％。金矿物与脉石和黄铁矿关系十分密切，其中脉石矿物粒间金占62．19％，黄铁矿与脉石粒间金占17．82％，有13．58％的金矿物包裹于脉石矿物中。浮选试验磨矿细度为－0．075 m m占75％，捕收剂采用S K和丁基黄药优化组合，一次粗选，二次扫选，二次精选，在原矿金品位为1．88 g／t时，试验获得金精矿金品位45．05 g／t ，金回收率为82．35％。%There are a small amount of sulfide minerals in a gold ore , the dissemination particle of gold min‐erals in the ore is relatively fine , micro -grained gold minera content is accounted for 89 .15% . Gold min‐erals is closely relationship with gangue and pyrite , gangue minerals of intergranular gold accounted for 62 .19% , pyrite and gangue intergranular gold accounted for 17 .82% , 13 .58% of the gold content package in the gangue minerals .The grinding fineness reaches -0 .075 mm 75% of flotation test ,SK and butyl xan‐thate optimization are collector , a roughing floatation , twice scavenging floatation , twice cleaning floata‐tion , gold grade of 1 .88 g/t in the run of mine ,the results of tests show that the gold concentrate with 45.05 g/t gold grade and 82 .35% gold recovery is achieved .
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