A scale-up method for multi-compartment dry ball mills used in cement industry

In this study, a new scale-up method was proposed for the design of cement grinding circuits. The proposed method depends on Morrell & Man's (1997) original idea to combine modelling approach with the Bond grindability test. After the breakage rate parameter (r/d) of Bond mill was calculated, it was scaled for design and operating variables between Bond mill and selected full-scale mill. Plant data was used for air classifiers and diaphragms separates two compartments. Then, the proposed method was verified for the data taken from a cement plant in Turkey. The predicted performance was found to be satisfactory in terms of tonnages and size distributions of the streams. The effect of changes in feed size and diaphragm design in the design stage were also evaluated.