Assertion: mineral's oxygen | /r/CapableOf | yield impure lead
Facets:
value: with antimony
type: OTHER
Source sentences:
text: The Isasmelt process is a more recent smelting method that may act as an extension to primary production; battery paste from spent lead–acid batteries (containing lead sulfate and lead oxides) has its sulfate removed by treating it with alkali, and is then treated in a coal-fueled furnace in the presence of oxygen, which yields impure lead, with antimony the most common impurity.