In this paper description of particle distribution obtained in laboratory a
nd industrial scale batch and continuous granulator is shown by hyperbolic
tangent distribution function. The number of adjustable parameters of the g
eneral hyperbolic tangent distribution function was decreased making an eas
ily usable form of the general hyperbolic tangent distribution function for
fitting to measured particle distributions. The parameters of this distrib
ution function were determined by the measured particle distributions, the
expressions obtained by the fitting procedure may be well used for describi
ng the particular process taken place. Moreover by the evaluation of experi
mental distributions, connections between the operating parameters of granu
lators are determined as well.