Apparatus for comminuting fibrous materials

摘要

The present disclosure relates to a comminution apparatus including a rotational reducing unit that is rotatable about an axis of rotation. The rotational reducing unit includes a plurality of material reducing components that are mounted to a carrier. The material reducing components are rotated by the carrier in a first direction about the axis of rotation. The comminution apparatus also includes a screen at least partially surrounding the rotational reducing unit. The screen defines a plurality of sizing slots that have slot lengths and slot widths. The slots are elongated along the slot lengths such that the slot lengths are longer than the slot widths.

主权项

1. A screening component for a comminution apparatus comprising:
a screen for at least partially surrounding a rotational reducing unit of the comminution apparatus, the screen including a screening region having an upstream-most boundary separated by a downstream-most boundary by an upstream-to-downstream screen dimension, the screening region including a plurality of first sizing slots having continuously open slot lengths and slot widths, the continuously open slot widths of the first sizing slots include first widths adjacent to the upstream-most boundary and second widths adjacent the downstream-most boundary, the first widths being smaller than the second widths, the continuously open slot lengths being longer than the slot widths, the continuously open slot lengths of the first sizing slots extending between the upstream-most boundary and the downstream-most boundary, the continuously open slot lengths traversing more than 50 percent of the upstream-to-downstream screen dimension.