Extensive material-processing and metrological studies have made it possible safely to design roller grinding mills with raw meal throughputs in excess of 600 t/h and drive capacities higher than 4000 kW. The inclusion of the material distribution above the louvre air ring and the internal material cycles has opened out new possibilities of saving energy. Roller grinding mills can now also be used for materials with a high grinding resistance, a low propensity to form a bed of material, widely varying component properties and high abrasiveness. Preliminary studies carried out on the grinding rolls can provide important information about material behaviour. Efficient mill operation is also assisted by the use of material baffles, water injection and optimized geometric configuration of the grinding elements. Calculation of the temperature curves in the mechanically highly stressed components and the acquisition of measurement data on the corresponding sets of loads are absolutely fundamental to the construction of large-capacity roller grinding mills.
