Assertion: heap leaching | /r/HasProperty | an extraction process
Facets:
value: from ore
type: OTHER
Source sentences:
text: Heap leaching is an extraction process by which chemicals (usually sulfuric acid) are used to extract the economic element from ore which has been mined and placed in piles on the surface.
text: Heap leaching is an extraction process from ore which has been mined and placed in piles on the surface.