Despite its apparent simplicity, the screening of materials of materials into different sizes as a very complex task. First of all, two main functions have to be fulfilled for a successful screening process. In order to achieve a successful classification, the feed materials has to be distributed over the entire screen width and the material has to be transported over the screen. Furthermore, the feed materials has to be loosened (break-up phase) so that fines can move to the screen for calassifying phase). During the final stage of the screening process, When the screening of near-size particles takes place. particles takes place. Particles are screened that are just slightly smaller than the mesh width. This phase is very important for high selectivity.
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