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Agglomeration heap leaching of precious metals.
CIM Bull 1987 Jun; 80(902):31-34
This paper describes a particle agglomeration technique to improve the flow of leaching solution through heaps of low-grade gold-silver ores that contain clays. Bench-scale experiments and industrial practice have shown 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 it to form agglomerates, and aging it before heap building and leaching. A slight modification of the technique allows its application to tailings containing precious metals, which cannot normally be treated by heap leaching because they are too fine.
OP; Journal Article
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Page last reviewed: September 2, 2020
Content source: National Institute for Occupational Safety and Health Education and Information Division