| 摘要 |
A method for refining material between opposing discs in a refiner including feeding the material to an inlet of at least one of the discs rotating one disc with respect to the other disc while the material moves radially outward between the discs, and subjecting the material to impacts caused by rows of teeth on the rotating disc intermeshing with rows of teeth on the other disc, wherein a feed angle formed by a leading edge of a tooth in a first row of teeth on at least one of the disc differs from a second feed angle formed by a leading edge of a tooth in a second row of teeth on the at least one of the disc and the difference between feed angles is in a range of 20 to 90 degrees, and a third feed angle formed by a leading edge of a tooth in a third row of teeth which differs from the feed angles for the first and second rows and the third row is intermediate the first and second rows, wherein the difference between the feed angles for the first and second rows is in a range of 20 to 90 degrees, and wherein the second row of teeth is one of an outer four rows of teeth on the plate and the second feed angle is at least 5 degrees.
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