Refiner plates

Details Refiner plates Refiner plates

D - Textiles, Paper

21

D

92/43

D21D 5/18 (2006.01) B02C 7/12 (2006.01)

Patent

CA 1151926

ABSTRACT OF THE DISCLOSURE An improvement in refiner discs for mechanical pulping of wood and other material is disclosed which increases wood pulp production. The improvement has at least one refiner plate set mounted on a disc to form a pair of opposing refiner plate sets. The one refiner plate set has a series of hard spots placed at different radial distances on the surface. In one process of manu- facturing the plate set, a series of locations are hardened, preferably by spot welding or spot hardening on at least one raised portion of the plate set.

361531

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