Disc separation: the effect of disc geometry

Net cleaning value is the economic value added to the KEYWORDS wastepaper pulp by removing the contaminants, corrected for the fiber lost to Adhesives the rejects, minus the cost of the energy consumed in the separation process. Angular velocity This study was undertaken to determine whether changing the geometry of a Impurities 152-mm-diameter disc surface from that of a flat surface to one having a Kraft pulps concave indentation would improve the net cleaning due. Hot-melt Power adhesive contaminant was removed from a simulated pulp furnish composed Recycling of corrugated fiberboard. At optimum operating condtions, a net cleaning Rotating discs due of $129/metric ton was obtained for a flat disc, compared to a Rotational velocity measured $l25/meuic ton for the indented disc. The energy saved from the Separation reduced speed requirement for the indented disc was more than offset by an Stock preparation increase in fiber loss, from 5.9% for the flat disc to 9.9% for the indented disc. Velocity Contaminant removal was slightly higher for the indented disc. measurement