Assertion: oxygen | /r/HasProperty | injected into the melt
Facets:
value: to scavenge impurities
type: PURPOSE
value: during the copper smelting process
type: TEMPORAL
value: deliberately
type: MANNER
Source sentences:
text: During the copper smelting process, oxygen is deliberately injected into the melt to scavenge impurities that would otherwise degrade conductivity.