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Title: Disc separation: the effect of disc geometry

Source: Tappi Journal, August 1987. pp. 107-110

Author(s)Klungness, John H.; Evans, James W.

Publication Year: 1987  View PDF »

Category: Journal Articles

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

Keywords: Adhesives, Angular velocity, Impurities, Kraft pulps, Power, Recycling, Rotating discs, Rotational velocity, Separation, Stock preparation, Velocity measurment

File size: 798 kb(s)

Date posted: 01/20/2012
Current FPL Scientist associated with this product
Evans, James W.
Mathematical Statistician
  

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