Size-frequency distribution grinding

The product from industrial grinding circuits oscillates due to variation in hardness and particle size distribution of feed. Heiskanen and Niemelia [47] demonstrated that, using automatic sampling, on-line analysis and autocorrelation procedures, they could map out a frequency of oscillation. 

The Sweco vibro-energy mill (Fig. 18) applies high frequency, three-dimensional vibrations to the grinding chamber that contains small cylindrical grinding media. This helps produce an ultrafine product with a narrow particle size distribution. 

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