为了提高青海某难选半氧化金矿的选矿回收率，在原矿工艺矿物学研究的基础上，开展了原矿浸出、浮选和浮选尾矿CIL浸出试验，并进行了环保提金剂和NaCN浸出对比试验研究。结果表明，在磨矿细度（-74 μm含量）为91.81%条件下，分别采用1#、2#环保提金剂和NaCN堤金，金的浸出率分别为80.07%、79.71%和80.80%；在磨矿细度（-74 μm含量）为83.64%条件下，采用浮选和浮选尾矿CIL浸出，获得浮选金精矿品位为125.94×10-6，浮选回收率为73.72%，浮选尾矿采用1#、2#环保提金剂和NaCN，选矿总回收率分别达到92.67%、93.62%和94.99%。

In order to improve the recovery of a certain refractory half oxidized gold ore in Qinghai Province，based on the process mineralogy research，the ore leach test，flotation and flotation tailings CIL experiment was carried out，then the environmental gold agent and sodium cyanide contrast leach test.The results show that respective used 1#，2# environmental leaching gold agent and the sodium cyanide，the gold leach rate was 80.07%，79.71% and 80.80% when the -74 microns content is 91.81%.Used flotation and then CIL leach process，the grade of the flotation concentrate is 125.94×10-6，the recovery of flotation is 73.72%，the flotation tailings leach test used 1#，2# environmental leaching gold agent and the sodium cyanide，the dressing comprehensive recovery respectively reached 92.67%，93.62% and 94.99%，when the -74 microns content is 83.64%.