Electrical energy consumption characterization of open-pit mining and mineral processing operations towards the use of renewable energy sources

Abstract

The mining sector is increasing its electrical energy consumption to face falling ore grade and more complex ore deposits. This scenario has meant a higher carbon footprint and high energy cost. Mining and mineral processing operations are energy intensive, and therefore, the identification of opportunities for reducing the cost associated with energy is of paramount importance. In this context, the characterization of electrical energy consumptions of the different processes in mining and mineral processing operations is a crucial task towards the development of strategies for increasing energy efficiency and the evaluation of renewable energy sources. This work, based on real data obtained from different Chilean open-pit mining sites, presents the characterization of key electrical energy consumptions for major mining and mineral processing operations. Several initiatives for energy management and the use of renewable energy are identified and analyzed by using this information.