Trends in der Minenindustrie - Mineral Processing
1 Introduction. Ore deposits with high content of recoverables are becoming increasingly rare. For some ores, the decrease in metal content is so significant that grinding to particle sizes smaller than 80 micrometres (µm) and below is necessary to ensure sufficient liberation of the ore [1]. Fig. 1 shows an overview of the average copper content in the ore beneficiation plants worldwide ...