朝鲜某地细粒级隐晶质石墨矿,原矿品位较低,石墨颗粒细小,与石英呈蜂窝状均匀嵌布,分离较困难.针对该矿石性质,对该矿进行选矿试验研究,通过采用一次粗磨一次扫选,粗精矿五次再磨七次精选,中矿(1-4)合并再选,中矿(5-8)集中返回再磨Ⅱ的浮选工艺流程进行开路、闭路试验,以及碳酸钠作调整剂,煤油作捕收剂,2#油作起泡剂,最终可获得品位为93.18％,回收率为91.23％的石墨精矿.%A beneficiation test of a refractory fine graphite ore in Korea area was studied. An open and closed trials were conducted by a flotation flowsheet, which consists one rough grinding,one scavenge, then five regrinding and seven cleanings to the crude concentrate,one more election to the merges of the middling(1-4) ,and the middling ( 5 - 8 ) returns to the regrinding Ⅱ.Taking the sodium carbonate as modifier, the coal oil as collector and the 2# oil as foaming agent,and eventually fixed carbon content of the graphite was increased from 21.07% to 93. 18% and the recovery rate of graphite was 91.23%.
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