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- W138599453 abstract "Heap leaching is one of several alternative process methods for treating precious-metal ores and is selected primarily to take advantage of its low capital cost relative to other methods. Heap leaching involves stacking of metal-bearing ore into a heap on an impermeable pad, irrigating the ore for an extended period of time with a chemical solution to dissolve the sought-after metals, and collecting the leachant as it percolates from the base of the heap. Heap leaching is performed in different configurations, each with certain advantages and disadvantages. Gold and silver are leached with a dilute alkaline solution of sodium cyanide. The recovery is dependent on the type of ore being processed. It is important to base the design of a heap leach on the results of a comprehensive program of laboratory testing. A heap leach can be operated in all climate types with proper design and water balance considerations. The mining, ore preparation. and stacking methods should vary. Where run-of-mine ore is to be leached it may be blasted heavily; fine crushed ore that is high in clays may be mined with minimal stockpiles. The environmental requirements for reclamation and closure vary widely and should be considered during the design phase of the heap. In operations, there are some common problems that can often be prevented. Operating costs are less sensitive to the size of the operation than capital costs." @default.
- W138599453 created "2016-06-24" @default.
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- W138599453 date "2016-01-01" @default.
- W138599453 modified "2023-09-26" @default.
- W138599453 title "Heap Leaching of Gold and Silver Ores" @default.
- W138599453 cites W576605665 @default.
- W138599453 doi "https://doi.org/10.1016/b978-0-444-63658-4.00025-6" @default.
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