Mantos Blancos is an open-pit mine located in the Antofagasta region of Chile. The mine is located within a one hour drive of port facilities at Antofagasta and Mejillones, and the Glencore-owned Altonorte copper smelter. There is no on-site accommodation as all staff live off-site, mainly in Antofagasta. The mine currently mines and processes both sulfide and oxide ores; going forward, the mine will primarily treat sulfide ore in an expanded concentrator.
The current sulphide concentrator has a capacity of 4.2 million tonnes of sulphide ore per year, with three stage crushing followed by ball milling and flotation plant. The oxide run-of-mine ore ore is leached on dumps, and the solution sent to an SX-EW plant with a production capacity of 60 thousand tonnes per year of high purity copper cathodes.
Mantos Blancos produces in the range of approximately 40 to 50 thousand tonnes of copper in concentrates and cathodes per year.