Ultra-fine grinding mechanism of inorganic powders in a stirred ball mill |
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Authors: | Hee?Kyu?Choi Email author" target="_blank">Woo?Sik?ChoiEmail author |
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Affiliation: | (1) Department of Chemical Engineering, University of Istanbul, Avcilar, Istanbul, 34320, Turkey; |
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Abstract: | Recently, in various industrial processes, the need for fine particles, especially submicron-sized particles, has increased
in the field of preparing raw powders such as fine ceramics and high value added products. Therefore, the research in fine
grinding has gained more importance, especially, in submicron grinding. In the previous paper, a series of wet grinding experiments
using inorganic powders by a stirred ball mill were performed. The grinding consumption power was measured, and the grinding
rate constant, K, in the grinding kinetics equation was examined, based on a grinding kinetics analysis of experimental specific
surface area with particle size distribution of ground products obtained under various grinding conditions. Also the effect
of grinding aids on grinding rate constant K was investigated. It was confirmed that the grinding rate constant K, when using
grinding aids improved by 1.95% and 25.6% for a 60 wt% and 70wt% slurry concentrate, respectively, when compared with the
case of the absence of grinding aids. It was found that grinding aids have an important effect on increasing the grinding
rate, especially for a slurry of high concentration. |
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