| 摘要 |
A pair of co-operating refining elements (10, 11) intended for a disc refiner to disintegrate and refine lignocellulosic material in a refining gap between two opposed refining discs rotating relative to each other. The refining elements (10, 11) are intended to be placed directly in front of each other on opposed refining discs. Both refining elements are formed with bars (12) and intermediate grooves (13), which in the outer portion (16) of the refining elements (10, 11) are arranged in a number of limited zones (17-24) located radially outside each other. Each refining element (10, 11) comprises at least one zone (18, 20 and, respectively, 21, 23) where the bars (12) are placed more densely than in an adjoining zone (17, 19 and, respectively, 22, 24). These more densely patterned zones (18, 20) on one refining element (10) shall be radially offset without overlapping in relation to the more densely patterned zones (21, 23) on the other refining element (11).
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