Classifying – separating – and assorting solids – Sifting – Combined type
Patent
1986-05-05
1989-05-02
Cherry, Johnny D.
Classifying, separating, and assorting solids
Sifting
Combined type
209269, 209275, 210388, 210389, B07B 900, B07B 128, B01D 3300
Patent
active
048260177
ABSTRACT:
A vibratory screening device for dressing, sizing, desliming, and dewatering feed streams of fine particulate material is comprised of a vibratory sieve bend screen and a vibratory planar screen deck. The sieve bend screen is positioned at the feed end of the planar screen deck and is arranged so that linear vibratory motion acting on the sieve bend screen is substantially tangential to the arcuate midsection of the sieve bend. Advantageously, the two units can be mounted on a single frame so that only a single vibratory drive is required for imparting linear vibratory motion to both the sieve bend and the planar screen deck. The linear vibratory motion is preferably at an angle of about 40.degree. to the main planar deck and imparts a counter-current force to the fine particulate material flowing across the mid-section of the sieve bend. This vibratory motion will tend to impede the flow of the feed stream along the sieve bend, thereby increasing the resident time of the solids on the sieve bend and thereby achieve improved screening efficiency.
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De Klerk Graham
Du Bourg Noel J.
Cherry Johnny D.
Velmet (Proprietary) Limited
Wacyra Edward M.
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