B - Operations – Transporting – 03 – B
Patent
B - Operations, Transporting
03
B
209/10
B03B 5/56 (2006.01)
Patent
CA 1059950
ABSTRACT OF THE DISCLOSURE: A wet-type classifier comprising: a rotary drum which has a front outlet at its front end and a rear outlet at its rear end, a feeding means for feeding muddy water containing sand into the drum, the feeding means being enclosed by the drum, disposed concentrically within the drum and attached to the drum for ro- tation therewith, the feeding means having an inlet opening adjacent to the front outlet of the drum and an outlet opening adjacent to the rear outlet of said drum, a classifying means for causing sand which is contained in the muddy water to settle onto the bottom of the drum and trans- ferring the settled sand towards the rear end of the drum, the classifying means being fixedly secured to the interior surface of the drum and covering substantially the entire length of the drum. A discharging means is fixedly secured to the rear end of the drum for expelling the transferred sand from the rear outlet of the drum comprising a plurality of paddles fixed to the inte- rior of the drum, each paddle having apertures for separating the water from the sand before the sand is discharged from the clas- sifier, the discharging means being disposed at the rear end of said drum and cone-shaped member being fixed to the inner ends of paddles for discharging the water-separated sand from the drum. The cone-shaped member has an exterior inclined surface and is disposed at the center of the plurality of paddles, whereby subs- tantially water-free classified sand of a desired size range is produced by the rotation of the drum with minimum wear on the classifier due to the friction from the sand. This single drum classifier has all the classifying elements integral with the drum such that they are all rotated with the drum.
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