Method and apparatus for the continuous centrifugal classifying

Details Method and apparatus for the continuous centrifugal classifying Method and apparatus for the continuous centrifugal classifying

1976-08-27

1979-05-08

Lutter, Frank W.

Classifying, separating, and assorting solids

Fluid suspension

Gaseous

209210, 209146, B07B 7086

Patent

active

041535413

ABSTRACT:
A continuous flow of material is separated in a continuous centrifugal classifying method into at least one fraction of coarse material and at least one fraction of fine material using a deflected flow with the stream of material introduced in a thin layer into a classifying flow which is deflected in a classifying region, the classifying flow being internally adjacent a curved inner deflection wall having an inner deflection angle greater than approximately 45.degree. and, the classifying flow also extending externally along a smaller outer deflection angle which is not defined by a wall but along which an outer flow for discharging the fraction of coarse material is established flowing substantially parallel to the inner deflection wall with the ratio between the radii of the outer and inner curvature being less than approximately 5 to 1, with the material to be classified introduced in the neighborhood of the beginning of the curvature of the inner deflection wall with a speed component in the direction of classifying flow which is at least half the speed of the classifying flow and which is in a direction which does not deviate by more than 45.degree. from the direction of the classifying flow with the fine material being primarily discharged with the outflowing classifying flow after being fanned out and the coarse material discharged with the external flow.

REFERENCES:
patent: 3311234 (1967-03-01), Rumpf et al.
patent: 3315806 (1967-04-01), Sigwart et al.
patent: 3520407 (1970-07-01), Rumpf et al.

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