The expansion would see the plant in northern Chile process additional sulfide material and achieve higher levels of copper recovery. According to Freeport, El Abra’s large sulfide resource could support a major mill project similar to facilities constructed in 2015 at Cerro Verde in Peru.
A parliamentary bill to increase royalties on Chilean miners has emerged in recent weeks amid higher commodities prices
and continuing social and economic hardship in the country.
“Technical and economic studies...