Abstract
The incorporation of a fine coal circuits (1.4 to 0.1 mm size fraction) into plants has raised the issue of the efficiency of size classification at separation sizes in the region of 0.1 mm. Recent work with centrifuges with laser cut screens has indicated they have shown not only good dewatering capabilities but also provide potential for rapid size classification in the size range of interest. An Australian Coal Association Research Program funded project resulted in a detailed investigation of this potential. The experimental results suggest that this type of unit provides a different classification capability that could assist in particular plant situations. The results have been able to be analyzed and described with a general model for size classification that has incorporated the possibility of particle capture in the bed of oversize particles.
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