B - Operations – Transporting – 03 – B
Patent
B - Operations, Transporting
03
B
B03B 7/00 (2006.01) B03B 5/28 (2006.01) B03B 5/52 (2006.01)
Patent
CA 2101109
ABSTRACT OF THE DISCLOSURE An apparatus for separating material of differing specific gravities while allowing for the collection of graded waste material which includes at least one elongate trough of decreasing volume disposed in a spiral configuration such that the exterior of the trough bottom forms the interior surface walls of a tubular body. The trough has a first end, a second end and sidewalls which converge inwardly from the first end toward the second end. A drive motor is provided for rotating the tubular body such that material is moved along the bottom portion of the trough from the first end toward the second end. One of the sidewalls diminishes in height from the first end toward the second end, forming a spillway located relative to the lowest point of rotation of the tubular body. Separation occurs through differing specific gravities with heavier product bearing material remaining in the trough while waste material and waste water is deposited over the spillway in a continuous separation process. Material is loaded onto the trough by means of a feed channel that is located in the first part of the trough and is part of the trough. The material may be sorted for size by a series of screens. Water may be supplied to assist in separation. Waste is removed from the tubular body and the trough by means of drains. Product bearing material is collected from the second end of the elongate trough for removal.
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