Refining plate obtaining mechanical pulp having refining curved bars with serrated sidewalls and method for designing front plates

摘要

A plate refiner (10, 34, 47, 50, 60, 70, 130) for a mechanical refining of lignocellulosic material, the plate having refining (10, 34, 47, 50, 60, 70, 130) having a surface refining it comprising a plurality of bars (20, 148) emerging from a substrate plate refining (10, 34, 47, 50, 60, 70, 130), where the bars (20, 148) extending outwardly toward an outer periphery (25) of the plate refiner (10, 34, 47, 50, 60, 70, 130), the bars (20, 148) they are straight or curved, and the refining surface further includes slots (21) between the bars (20, 148), where each of the bars (20, 148) includes a front side wall (28, 36, 146) having an irregular surface in the radially outer section, characterized in that each bars (20, 148) has a radially outer section having a locking angle in the outer periphery of the bars (20, 148) of at least 30 degrees from a radial line at a DIRECTION n rotation refining plate.