B - Operations – Transporting – 03 – B
Patent
B - Operations, Transporting
03
B
B03B 5/40 (2006.01) A01D 33/04 (2006.01) B03B 5/30 (2006.01) B03B 5/46 (2006.01)
Patent
CA 2062825
A method and apparatus for sorting articles (30, 32) with small density differences utilizing a flotation stream (93) which continuously flows through a trough (88) to effect the separation of a mixture (28) of articles (30, 32) having small density differ- ences into several groups (30a, 30b, 30c, 30d). Each density group (30a, 30b, 30c, 30d) of the mixture (28) of articles to be separat- ed is introduced at the head of the flotation stream (93) at a selected depth. In one embodiment, the flotation stream (93) may be comprised of a fluidized bed (94) which is created by forcing a gas upwardly through a fluidization medium (96) such as sand. Once the mixture (28) of articles (30, 32) is introduced at the selected depth into the flotation stream (93) near the head of the stream, since the density of the flotation stream (93) is greater than the density of the articles (30), the articles of lesser density (30a, 30b, 30c, 30d) begin to ascend toward the top of the flotation stream (93) while at the same time the articles (30, 32) are car- ried downstream by virtue of the velocity of the flotation stream (93), thereby effecting a spacial separation of the articles (30, 32) based upon their differing densities.
Camas International Inc.
Cassan Maclean
LandOfFree
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