B - Operations – Transporting – 24 – B
Patent
B - Operations, Transporting
24
B
B24B 13/00 (2006.01) B02C 7/12 (2006.01)
Patent
CA 2085625
GRINDING PLATE WITH ANGLED OUTER BARS Abstract of the Disclosure A grinding plate (10) for the face (104) of a refiner disc (100) having a center and a substantially circular periphery (102), comprises a plurality of grinding plate segments (12) arranged side-by-side on the face (104) of the disc to form a substantially annular refining region (14) having an inner edge (22) near the center and an outer edge (24) near the periphery of the disc. Each plate segment (12) extends substantially radially and has a pattern of bars and grooves between bars, whereby material to be refined and steam produced during refining, can flow in the grooves in the general direction from the inner edge (22) toward the outer edge (24) of the refining region (14). The pattern includes an inner pattern (18) of substantially radially oriented inner bars (30) and inner grooves (32), substantially each inner groove having dam structure (34) for interrupting radial flow of material therethrough and an outer pattern (20) of outer bars (36) and outer grooves (38), defining flow channels (48) extending from the inner pattern (18) to the outer edge (24) of the plate segment (12) at an angle of at least about 45 degrees relative to the general direction of flow through the inner grooves (32). The flow channels (48) do not have surface dams.
Andritz Sprout-Bauer Inc.
Smart & Biggar
LandOfFree
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