Figure 3 – Process egories based on leach recovery vs ore gold grade (McNab, B., 2006) 3. LEACHING IN THE NATURAL ENVIRONMENT Water is a universal lowpolarity solvent in action in the nature: Water soluble salts in ores tend to dissolve in percolating rainwater and .
· Goldprocessing operations derive their water supplies from a variety of sources. The water is mostly used in the milling and/or heapleach operations. Minor uses include service water, water within the backfill (for underground mines), dust control, .