Solid material comminution or disintegration – Processes – With application of fluid or lubricant material
Patent
1993-05-03
1994-03-29
Seidel, Richard K.
Solid material comminution or disintegration
Processes
With application of fluid or lubricant material
241 21, 241 23, 241 24, 241DIG38, 162 4, 162 55, 209 11, B02C 2310
Patent
active
052977420
ABSTRACT:
A method an apparatus for treating waste, such as domestic garbage, industrial waste and the like, in which the waste is suspended in a liquid such as to obtain a slurry or a pulp. The constituents of the pulp or slurry are separated into different fractions in accordance with their density and/or magnetic properties or like features. Subsequent to having sorted (18, 24, 26) and removed objects from the pulp or slurry, the pulp or slurry is fed to a wet dryer (32) in which the pulp or slurry is kneaded. As a result, the composite material is separated into its respective constituents; for instance, plastic coatings are separated from their respective substrates, such as paper. The pulp or slurry is washed (36) downstream of the wet grinder (32), in order to remove plastic debris (40). The thus obtained fibre suspension is then led away for further treatment (44) or use. When producting the waste/liquid suspension, the suspension is heated to a temperature of at least 60.degree. C., by delivering hot water or steam thereto. Hot water or steam may also be delivered to the wet grinder, in order to maintain the material therein at a temperature of at least 60.degree. C.
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Grunditz Leif
Karlsen Odd
Peterson Kenneth E.
Seidel Richard K.
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