Flotation apparatus for separating impurities from a fiber suspe

Details Flotation apparatus for separating impurities from a fiber suspe Flotation apparatus for separating impurities from a fiber suspe

1980-02-20

1981-07-07

Cuchlinski, Jr., William A.

Classifying, separating, and assorting solids

Fluid suspension

Liquid

261 87, 2102211, B03D 120

Patent

active

042773288

ABSTRACT:
The invention concerns a flotation apparatus for separating impurities, such as printing ink, or the like, from a fiber suspension that has been formed from waste paper. The apparatus includes a container for flotation of the suspension. A drive shaft extends into the container, either from above or below. A feed opening for suspension is defined at the bottom of the container. On the drive shaft is a pump impeller for impelling suspension into the container and downstream along the drive shaft. From the pump impeller there is a rotor located on the drive shaft for dispersing air that is introduced to the container by an air feed conduit which emits air into the region of the rotor. The drive shaft itself may serve as the air feed conduit and it may have air outlets at either or both of the pump impeller and the rotor. A foam withdrawal means for withdrawing the foam of impurities generated in the flotation apparatus has an inlet positioned at the axis of the cylinder which is at the axis of the rotor.

REFERENCES:
patent: 2061564 (1936-11-01), Drake et al.
patent: 3050188 (1962-08-01), Nisser et al.
patent: 3070229 (1962-12-01), Benozzo
patent: 4028229 (1977-06-01), Dell
patent: 4078026 (1978-03-01), Fallenius

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