Solid material comminution or disintegration – Processes – With application of fluid or lubricant material
Patent
1977-10-07
1980-04-22
Lazarus, Richard B.
Solid material comminution or disintegration
Processes
With application of fluid or lubricant material
241 24, 241 4617, B02C 1318, B02C 13282, B02C 13284
Patent
active
041991109
ABSTRACT:
Process and apparatus are provided for disintegrating waste paper containing metallic and similar particulate material appreciably heavier than the paper, and separating the heavier material from an aqueous slurry of disintegrated paper fibers and particles by centrifugal force and gravity settling, comprising disintegrating waste paper in the presence of water while imparting a vortical flow to the resulting slurry of a velocity sufficient to throw relatively heavy particulate material towards the outer periphery of the resulting vortex while lighter waste paper fibers and particles move towards the inner periphery of the vortex; establishing a relatively quiescent zone below the outer periphery of the vortex; permitting the heavier particulate material in that zone to settle out and collect; and withdrawing a slurry of waste paper fibers and particles from an inner peripheral portion of the vortex relatively free from heavier particulate material.
REFERENCES:
patent: 2340511 (1944-02-01), Cowles
patent: 3722832 (1973-03-01), Seifert
patent: 3946951 (1976-03-01), Danforth
patent: 4030671 (1977-06-01), Coature
Lazarus Richard B.
Mo och Domsjo Aktiebolag
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