Increased Cement Grinding Efficiency by Using High-Efficiency Separators

High-efficiency classifiers improve the grain size distribution of the finished cement and reduce grinding power requirements. Theoretical calculations indicate potential power savings of up to one-third at the main mill motor when applying high-efficiency classifiers instead of conventional separators at a cement fineness of 15 percent residue at 0.030 mm. The most commonly used separators of conventional and high-efficiency design are presented and briefly characterized. Data on actual performance of grinding systems are stated which indicate that some 15 percent of the grinding system´s power consumption can be saved when applying high-efficiency classifiers instead of conventional separators at 3500-4000 cm2/g (Blaine) cement fineness.