Assertion: ore's mineral | /r/HasProperty | concentrated to the level of 10–15% copper
Facets:
value: by bioleaching
type: MANNER
value: from crushed ores
type: OTHER
value: by froth flotation
type: CAUSE
Source sentences:
text: These minerals are concentrated from crushed ores to the level of 10–15% copper by froth flotation or bioleaching.