B - Operations – Transporting – 02 – C
Patent
B - Operations, Transporting
02
C
241/136
B02C 23/36 (2006.01)
Patent
CA 1087145
PROCESS AND APPARATUS FOR DISINTEGRATING WASTE PAPER WHILE SEPARATING METALLIC PARTICULATE MATERIAL PRESENT IN THE PAPER ABSTRACT OF THE DISCLOSURE Process and apparatus are provided for disintegrating waste paper containing metallic and similar particulate material appreciably heavier than the paper, and separating the heavier material from an aqueous slurry of disintegrated paper fibers and particles by centrifugal force and gravity settling, comprising disintegrating waste paper in the presence of water while imparting a vortical flow to the resulting slurry of a velocity sufficient to throw relatively heavy particulate material towards the outer periphery of the resulting vortex while lighter waste paper fibers and particles move towards the inner periphery of the vortex; establishing a relatively quiescent zone below the outer periphery of the vortex; permitting the heavier particulate material in that zone to settle out and collect; and withdrawing a slurry of waste paper fibers and particles from an inner peripheral portion of the vortex relatively free from heavier particulate material. The apparatus comprises, in combination, a housing; a disintegra- tion chamber in the housing; a rotatable disintegrator mounted in the chamber for disintegrating waste paper in the presence of water and imparting a vortical flow to the resulting slurry of a velocity sufficient to throw relatively heavy particulate material towards the outer periphery of the resulting vortex while waste paper fibers and particles move towards the inner periphery of the vortex; at least one outlet in the chamber adjacent the inner periphery of the vortex and below the rotor for withdrawing a slurry of waste paper fibers and particles; a filter across the outlet permitting only waste paper fibers and particles below a predetermined size to escape from the chamber; and a well in the chamber below the level of the outlet and of the rotatable disintegrator and extending beneath at least the outer periphery of the vortex, radially outward from the outlet, for collection of heavier particulate material thrown to the outer periphery of the vortex, and settling out by gravity in a relatively quiescent zone within the well.
288321
Kvaerner Pulping Aktiebolag
Macrae & Co.
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