Method and device for concentrating substances in solid particle state
AssigneeGenimin Sprl
InventorPol Huart
Life of this patent
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Abstract
A method for concentrating a particulate matter, comprising at least two constituents of different densities, in which a slurry of particulate matter is subjected to centrifugation and to centripetal pulses in a centrifugation chamber. A dense fraction of the slurry and a light fraction of the slurry are drawn off separately from the centrifugation chamber. In order to produce the centripetal pulses, a fluid is injected into the slurry, in a direction oblique or tangential to the direction of centrifugation. The fluid is injected substantially continuously into the slurry.
Claims24
A method for concentrating by densimetry a particulate matter, comprising at least two constituents of different densities, in which a slurry of said particulate matter is subjected to jigging by centrifugation and to centripetal pulses in a centrifugation chamber having a length and a stationary and substantially cylindrical peripheral wall, and a dense fraction of the slurry and a light fraction of the slurry are drawn off from the centrifugation chamber through the peripheral wall of the chamber, wherein, in order to produce the centripetal pulses, a fluid is injected into the slurry through the peripheral wall of the chamber in a direction oblique or tangential to the peripheral wall such that a pulsing force is imparted to the slurry in the direction of centrifugation, the fluid being injected substantially continuously into the slurry.
An apparatus for concentrating a particulate matter, comprising at least two constituents of different densities, said apparatus comprising a centrifugation chamber provided with a stationary and substantially cylindrical peripheral wall extending along a length, a device for introducing a slurry of said particulate matter into the centrifugation chamber, a device for generating centripetal pulses in the slurry in the centrifugation chamber, a device for drawing off a dense fraction of the slurry and a device for drawing off a light fraction of the slurry, wherein the device for drawing off a dense fraction of the slurry and the device for drawing off a light fraction are arranged in the peripheral wall to draw off liquid through the peripheral wall, and the device for generating centripetal pulses in the slurry comprises a duct which opens into the centrifugation chamber through the peripheral wall in a direction oblique or tangential to the peripheral wall, and which communicates with a pressure source, said pressure source being designed such that the injection of the fluid is continuous and at a substantially constant flow rate and/or speed, and the duct for injection of impulse generating fluid is arranged downstream of the duct for introducing the slurry and upstream of the device for drawing off a dense fraction and the device for drawing off a light fraction, with respect to the direction of flow.
Dependencies are inferred from the claim text.