Agglomeration Heap Leaching of Precious Metals.
14th Annu Hydrometall Mtg Timmins Ontario Canada 1984 (11):1-15
The Bureau of Mines developed a particle agglomeration technique to improve the flow of leaching solution through heaps of low-grade gold and silver ores that contain clays. Bench-scale experiments and industrial practice show that the percolation rate of cyanide leaching solution is greatly enhanced by mixing the ore with portland cement as a binder, moistening the mixture, mechanically tumbling to form agglomerates, and aging before heap building and leaching. A slight modification of the technique allows its application to precious-metal-bearing tailings, which cannot normally be treated by heap leaching because they are too fine.
14th Annu. Hydrometall. Mtg, Timmins,Ontario, Canada, No. 11, 1984, PP. 1-15