US20040238415A1 - High efficiency two-stage dynamic ...
A two-stage dynamic classifier ( 30, 30 ′) for classifying a pulverized feed material ( 34, 34′, 38 ) entrained in an air flow ( 31 ) includes a vertically extending housing having a lower feed material inlet (18), an upper feed material outlet ( 24 ), a processing section ( 47, 47 ′) disposed between the feed material inlet and the feed material outlet, and a lower tailings discharge ...
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