JOHANNESBURG (miningweekly.com) – Mining major Anglo American’s copper production increased by 32% to 207 300 t in the three months ended September 30, driven by improved operating performances and grades at its Los Bronces and Collahuasi operations.
n at the group’s Collahuasi copper mine, in Chile, increased 130% year-on-year to 63 600 t for the third quarter.
“This significant increase reflects the ball mill breakdown and semiautogenous mill (SAG) 3’s underperformance in 2012. Following the SAG 3 stator motor replacement and repowering in the second quarter of this year, mill throughput has increased, with performance for the quarter in line with expected capacity,” Anglo said in a statement on Friday.
Further, production at the group’s Los Bronces copper mine, in Chile, increased by 22% year-on-year to 106 400 t, owing to the continued strong performance of the Confluencia plant.
The miner added that reduced mine congestion and debottlenecking at Los Bronces’ primary crushers had improved continuity of ore supply and throughput at both processing plants, while improvements implemented in the Confluencia milling and flotation processes had also resulted in higher recoveries.
Meanwhile, Anglo’s export metallurgical coal production increased by 9% to a record 4.9-million tons in the quarter, owing to continued longwall performance improvements, which offset the planned closure of the group’s Aquila coal mine, in Australia, which was put on care and maintenance at the end of July.