Classifying – separating – and assorting solids – Fluid suspension – Gaseous
Patent
1990-01-03
1991-07-16
Hajec, Donald T.
Classifying, separating, and assorting solids
Fluid suspension
Gaseous
209 32, 209146, 209154, B07B 402
Patent
active
050322567
ABSTRACT:
The application disclosed a granular material classifying device comprising a horizontally disposed, transversely unrestricted wind tunnel, having an upstream end, a downstream end, a top end and a bottom end, for directing a horizontal airflow from the upstream end to the downstream end thereof; an air forcing assembly operatively mounted on the wind tunnel for inducing the horizontal airflow therethrough; a particle injection assembly operatively associated with the wind tunnel for free fallingly injecting a flow of granular particles to be classified into the horizontal airflow at an upstream, top end portion of the wind tunnel; and a bottom skirt assembly mounted at a bottom portion of the wind tunnel; the bottom skirt assembly defining at least one transversely unrestricted skirt cavity in fluid communication with the wind tunnel and having a downwardly and inwardly tapering cross sectional configuration adapted to provide a low velocity airflow interface between the wind tunnel horizontal airflow and the atmosphere; the at least one skrit cavity comprising a longitudinally extending slit in a bottom portion thereof adapted to enable discharge of granular particles therethrough. A granular material separating device and various methods of operating the classifying device and separating device are also disclosed.
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Chapter 9, Taggart, Handbook of Mineral Dressing, John Wiley & Sons, New York (1964).
Hajec Donald T.
Klaas Bruce G.
O'Meara William P.
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