Heap Leaching
nounPronunciation: /hiːp ˈliːtʃɪŋ/
An ore processing method where crushed ore is stacked in heaps and treated with chemical solvents that percolate through the material to extract valuable minerals, leaving behind residual waste rock. The resulting leachate and spent ore pose significant environmental reclamation challenges including contamination risk.
Plain English
Mining ore is stacked in piles and sprayed with chemicals to extract metals, leaving toxic waste behind.
Etymology & History
Usage
"Remediation of the abandoned heap leaching site required containment of sulfuric acid leachate and stabilization of the spent ore stockpile."
Style guide notes: Spell as two words 'heap leaching'; specify solvent type (sulfuric acid, cyanide) when precision is needed.
Also known as
Contrasted with
Related Terms
Frequently Asked Questions
What environmental issues result from abandoned heap leach operations?
Contaminated leachate seepage, acidification of groundwater, and unstable waste rock piles threaten ecosystems.
How is a heap leach site reclaimed?
Containment systems, leachate capture, waste stabilization, and capping or vegetation are typical remediation approaches.
Why Test Candidates on This?
Key concept for environmental impact assessment and reclamation planning in precious metals mining closure.
Required skill level: Mid