Heap leaching Heap and dump leaching processes are approximately identical although they differ in the type and amount of leached material In heap leaching the ore is crashed and piled up into a relatively small heaps up to approximately 100 000 t on an impervious base or concrete or asphalt surface with drainage channels and blow holes
Leaching of porphyry copper mine strip wastes and lowtenor ores provides a substantial part of U S copper needs Dump leaching requires years to extract part of the copper and leach dumps often become impermeable owing to precipitation of iron salts which greatly reduces the copper leaching rate
Enhanced Heap Leaching – I Insights Shlomo Orr Abstract Flow in heaps and dumps is essentially a twophase flow phenomenon though for many appliions it could be simplified as unsaturated flow Unlike saturated flow typical of groundwater flow where flow and their importance for heap leaching heap rinsing and closure with
Proc of XXII World Mining Congress Vol II Istanbul Turkey 2011 pp 271276 HEAP AND DUMP LEACH PROCESS AT THE BUCHIM COPPER PROJECT METALLURGICAL TESTWORK
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