HEAP LEACHING TECHNIQUE in MINING
decreases profitability, making beneficiation processes uneconomical below certain grades. 4 0 Figure 1 – Relationship Between Excavation Quantity and Average Grade of Mined Ore as a function of "cutoff grade" (modified from McNab, B., 2006) In response to global increases in metal commodity prices, the low grade base metal and precious metal ores (<1% copper, <1g/ton gold, < % ...