Pulp refining at resonance

A disc refiner model for stock preparation for paper and board manufacture, is derived. The torsional response of the machine under operating conditio ns is considered. Resonance excitation via drive and flow pulsation variati ons is achieved enabling optimum torsional oscillatory behaviour to be atta ined. The effect of this action on the reciprocal shredding and shearing pe rformance of the machine is commented upon and simulated response character istics are presented. (C) 1999 Academic Press.