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东北寨金矿的金以次显微状分散在硫化矿物和粘土矿物中,连电子显微镜和电子探针都见不到,还含较高的有害杂质砷、硫和有机炭,属极难选冶矿石。 为了从该矿中回收金,制定了原矿焙烧—磨矿—炭浆(浸)法和浮选—精矿焙烧—碎散—炭浆(浸)法等两种选冶工艺,前者金回收率81.6～83.9％,后者79.6～81.2％。混合矿扩大连续试验的回收率分别为80.3％和74.6％。本试验的成功,为东北寨式金矿的开发利用开辟了道路。
The gold of Dongbei Zhai gold deposit is slightly dispersed in sulphide minerals and clay minerals, which can not be observed by electron microscope and electron probe. It also contains arsenic, sulfur and organic carbon which are harmful impurities, which is very difficult to choose Ore ore. In order to recover the gold from the mine, two ore dressing and smelting processes have been established, including ore roasting, grinding ore-carbonization (leaching) method and flotation-concentrate roasting-disintegration-carbonization (leaching) method. The former gold recovery rate 81.6 ~ 83.9%, the latter 79.6 ~ 81.2%. The recovery rate of the mixed ore expanded continuous test was 80.3% and 74.6% respectively. The success of this experiment has opened the way for the development and utilization of the Zhaigou Gold Mine in Northeast China.