The Hierro Atacama Concentrator is located in the Atacama region of Chile. It is majority owned by the vertically integrated Chilean steel producer Compañía de Acero del Pacífico (CAP) and operated by an owned subsidiary Compañía Minera del Pacífico (CMP). The concentrator began production in 2008 and primarily uses tailings from the Freeport Candelaria copper mine. Since 2011 it has also processed some tailings from the Los Colorados mine.The tailings from both Candelaria and Los Colorados are extremely low in iron resulting in low mass recovery rates. Therefore the cost of processing this material to a saleable quality product is very high.