Abstract
High-frequency screen tests of a number of different fine slurries are analyzed to determine the effect of slurry feed rate and weight per cent solids on screen size selectivity values. Results of this analysis indicate that for the screen cloths tested, slurry feed rate has a negligible effect on size selectivity values but that increasing the feed solids concentration causes finer but less efficient particle size separation. The size selectivity data are analyzed to give values for the d 50 , the sharpness index and apparent bypass parameters of a screen size selectivity equation. Approximate empirical relationships between these parameters and screen aperture size and slurry feed solids concentration are given, and an example of the use of the size selectivity equation in grinding-circuit simulations is presented.
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