“…The presented model can be used to model the process of coal cleaning, where a classification is one of the most important stages (Benović et al, 2012). It should be noted that the waste, generated in the process of coal wet cleaning, can be used for combustion in the coal-water slurry (KijoKleczkowska, 2012;Mochalov et al, 2012). The application of other equations of Tromp's curve (Napier-Munn, 1991;Wang et al, 1999;Benzer, 2005, Kis et al, 2006Mohanta & Mishra, 2009;Lanzerstorfer, 2011) and the consideration of particles dynamics (Brożek & Surowiak, 2010).…”