国外对矿岩坚硬的金银矿床,多采用堆浸法开采,因为它较普通的采选冶工艺简单灵活、投资少、成本低,储量大小、品位高低均宜,还有利于环境保护。据已发表的资料称,已知的金属中,除少数几种外,均可用此法回收。美国用该法生产的铜和铀占其总产量的20％左右。下面只介绍金、银的堆浸技术及典型实例。 (一)堆浸系统简述典型的贵金属堆浸作业流程是:把从矿床中采出的矿石,堆在不渗透的垫板上,在浸堆上面铺设管路, Foreign gold and silver ore deposits on the hard rock, and more heap leaching method mining, mining and metallurgy because it is more simple and flexible technology, less investment, low cost, the size of the reserves, the level is appropriate, but also conducive to environmental protection. According to published data, known metal, except for a few, can be recovered by this method. The U.S. copper and uranium produced by this method make up about 20% of its total output. The following describes only gold, silver heap leaching technology and typical examples. (A) a brief description of the heap leaching A typical precious metal heap leaching operation process is: ore from the ore bed, piled in the impermeable pad plate, laid in the immersion pile above the pipeline,