Chilean State-owned Codelco, the world's largest copper miner, on Tuesday confirmed to Reuters that it will extend maintenance work at its Chuquicamata smelter to 135 days, from an initially planned 90-day stoppage.
Codelco has warned of further operational issues because of the planned work, after its accumulated copper output from January to September fell 10% year-on-year partly due to issues at Chuquicamata's refinery and smelter.
