Abstract

The effect of slurry density on the dynamics and grinding behavior of a batch ball mill was studied using quartz as a test material. It was found that slurry density determined the distribution of solid charge in the mill, with migration of particles from the tumbling zone to the mill periphery as solid concentration was progressively increased. This effect caused a change in the circulation path of moving balls, as reflected by the variation in mill power. The interaction between grinding media slurry charge under changing slurry density gave rise to various grinding characteristics inherent with wet systems. Hypotheses were proposed and tested to provide physical reasons for these grinding behaviors.

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