Experimental Research on Granulation-heap Leaching for a Low-grade Gold Ore

Researches on granulation-heap leaching of low-grade gold fine ores were carried out in this paper, granulation factors such as bonder, consumption, water dosage, and curing time were investigated, and heap-leaching tests were taken to identify leaching performance of pellet ores. Results indicated that the best conditions of granulation are as follow: consumption of cement is 7kg/t, water dosage is 30L/t, pellet size between 2.36mm and 20mm, curing time above 24h. Permeability of pellet ores improved greatly, leaching tailings of column leaching and heap leaching are 0.06g/t, 0.089g/t, respectively.