Surface Deterioration of Refiner Plates for Thermomechanical Pulping, 1994 Pulping Conference Proceedings
D. Christensen, Y. Jia, M. Scholl, P. Clayton, S. Abubakr
Used refiner plates were subjected to scanning electron and optical microscopy examination to characterize the surface damage and generate insights to the deterioration processes. Eight plates of different materials were examined, taken from different refiner types (some primary, some secondary) after 1,000 to 2,000 h of service. While useful information was generated, the wide range of variables involved made it difficult to define the relationship between plate deterioration and increasing operating service.
A series of controlled experiments provided a more systematic approach. Plates of a single material, all cast in the same pattern, were used to refine white wood in a Bauer 4852 counterrotating primary refiner. They typical plate life was determined to be 1,000 to 1,200 h. New sets of plates were run for 147, 550, 772, and 1,166 h before being removed from the refiner.
Surface Deterioration of Refiner Plates for Thermomechanical Pulping, 1994 Pulping Conference Procee
