在美国西部,许多低品位的金银矿床和过去采矿留下的尾矿都是潜在的贵金属资源。对于这类品位太低或储量太小、不足以为之投资建设常规氰化工厂的资源,可采用氰化堆浸法回收其中的贵金属。为了提高金银的回收率,美国矿业局研究了许多种方法,制粒堆浸法即是其一。堆浸欲求成功,破碎的矿石堆必须使其有良好的渗透性,使氰化物溶浸液可以通过 In the western United States, many low-grade gold and silver deposits and tailings from past mining are potential precious metal resources. For such grade is too low or too small reserves, not enough investment for the construction of conventional cyanidation plant resources, cyanidation heap leaching method can be used to recover the precious metals. In order to improve gold and silver recovery rate, the United States Bureau of Mines studied many methods, granulation and heap leaching method is one of them. Heap immersion desire success, broken ore heap must make it have good permeability, cyanide infiltration solution can be passed