An analysis of fine dry grinding in ball mills - ScienceDirect
Jan 01, 1981· The large-scale mills used for grinding coal or cement are airswept and usually operate in closed circuit with a size classifier- Thus the size distribution of the mill hold-up is considerably coarser than the final product- Also, in the case of cement it is common practice to use grinding additives which improve the flowability of 50 <5~ i - I ...