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 conditions is considered. Resonance excitation via drive and flow pulsation variations is achieved enabling optimum torsional oscillatory behaviour to be attained. The effect of this action on the reciprocal shredding and shearing performance of the machine is commented upon and simulated response characteristics are presented.