Heap leaching definitions

Heap leaching

1) Metallurgical process
Found on https://www.crosswordclues.com/clue/heap-leaching

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Heap leaching

Heap leaching is an industrial mining process to extract precious metals, copper, uranium, and other compounds from ore via a series of chemical reactions that absorb specific minerals and then re-separates them after their division from other earth materials. Similar to in situ mining, heap leach mining differs in that it places ore on a liner, t...
Found on http://en.wikipedia.org/wiki/Heap_leaching

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heap leaching

[3 related articles]
Found on http://www.britannica.com/eb/a-z/h/28

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heap leaching

a process whereby gold is extracted by 'heaping' ore on sloping impermeable pads and applying, to the heaps, a weak cyanide solution which dissolves the gold content. The gold-laden solution is collected for gold recovery and recycled to the heaps
Found on http://www.encyclo.co.uk/visitor-contributions.php

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Heap leaching

A process for recovering metal, most commonly copper, from oxide or low grade ore or residues. Material is heaped up on an impermeable surface and sprayed with acid which picks up metal and is collected and sent for refining. The process may be bacterially assisted. See also Cement copper and SX/EW.
Found on http://www.metalbulletin.com/Glossary.html

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Heap leaching

A process whereby copper or gold is extracted by “heaping” broken ore on sloping impermeable pads and continually applying to the heaps a weak cyanide solution which dissolves the contained copper or gold. The copper or gold laden solution is then collected for copper or gold recovery and recycled to the heaps.
Found on https://copperfoxmetals.com/investors/glossary-of-terms/

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heap leaching

Generally, an industrial mining process in which a valuable metal is extracted from a heap, or pile, of crushed ore. For copper oxide ore, heap leaching is the first stage in the process of hydrometallurgy, in which a chemical solution is applied to a heap of crushed ore, through which it percolates, dissolving the copper. The resulting pregnant le...
Found on https://superfund.arizona.edu/resources/modules/copper-mining-and-processin

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Heap leaching

A process whereby valuable metals (usually gold and silver) are leached from a heap, or pad, of crushed ore by leaching solutions percolating down through the heap and are collected from a sloping, impermeable liner below the pad.
Found on https://www.encyclo.co.uk/local/22734

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