采用多层重叠堆浸法，矿堆总高度大，容易降低溶液的渗透性或产生偏析。为了保证矿堆长时间具有好的渗透性并防止产生偏析，所有入堆矿石都应进行严格筛分。筛出的粉矿和矿泥必须制粒并在固化后单独筑堆浸出（或将粉矿和矿泥送搅拌浸出处理），因制粒的颗粒机械强度小，堆矿高度最多不能超过4～7.5m。
Multi-layer overlap heap leaching, the total height of the heap large, easy to reduce the permeability of the solution or segregation. In order to ensure a long heap with good permeability and prevent segregation, all the ore heap should be strict screening. Screen out of fine ore and slime granulation and after curing must build a separate heap leach (or the powder ore and slime send agitation leaching process), the mechanical strength due to the small particle granulation, ore pile height no more than 4 ~ 7.5m.
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