The effect of the number of contact points between grinding elements on the rate of grinding in ball mills
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Technical University of Lodz
Publication date: 2004-01-01
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Tomasz P. Olejnik   

Technical University of Lodz, Faculty of Process and Environmental Engineering, 90-924 Lodz, Stefanowskiego 12/16, Poland
Physicochem. Probl. Miner. Process. 2004;38(1):147–155
Results of studies aiming at the determination of the effect of the number of contact points of grinding media on the rate of grinding in ball mills are discussed in the paper. Studies covered batch mills operating in industrial conditions. Wet grinding in a water solution with the addition of anti- emulsifiers was carried out for typical raw materials applicable in industrial production of ceramic tiles. The process of grinding was investigated for three industrial ball mills with different numbers and sizes of corundum grinding media. In the tested mills the rate of grinding of particular size groups was specified. The change of ground material particle size distribution in time was analysed, and the effect of ball size, frequency of drum revolutions and the number of grinding media on the process rate was reported. This rate is variable during grinding and the effect of the above mentioned factors is different in consecutive periods of the process.