A method and device for the separation of particles

B - Operations – Transporting – 03 – B

Patent

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B03B 5/10 (2006.01) B03B 5/24 (2006.01)

Patent

CA 2438021

The invention relates to a method of in a liquid separating a mixture of particles that within chosen limits have different physical property values, wherein the particles to be separated are supplied via a feeder to a screen upon which a layer of facilitating particles is disposed, the size of the facilitating particles being too large to fit through the openings in the screen, wherein particles to be separated are passed through the layer of facilitating particles and through the openings in the screen and collected under the screen, the density of the particles being greater than that of the liquid, and wherein a repetitive vertical movement is provided between the particles and the liquid, respectively. The invention is characterized in that all particles to be separated are passed through the layer of facilitating particles and the screen, and wherein the particles having a high density will move faster through the layer of facilitating particles and the screen than the particles having a lower density. The invention also relates to a device for carrying out such a method.

L'invention concerne un procédé destiné à séparer, dans un liquide, un mélange de particules présentant différentes valeurs de propriétés physiques comprises dans des limites prédéfinies. Les particules à séparer sont acheminées par l'intermédiaire d'un appareil d'alimentation vers un tamis sur lequel une couche de particules auxiliaires est disposée. La dimension des particules auxiliaires est trop importante pour qu'elles traversent les ouvertures du tamis. Les particules à séparer, quant à elles, peuvent traverser la couche des particules auxiliaires et les ouvertures du tamis avant d'être recueillies sous ce tamis. La densité des particules est supérieure à celle du liquide, un mouvement vertical répété étant respectivement produit entre les particules et le liquide. L'invention se caractérise en ce que toutes les particules à séparer traversent la couche de particules auxiliaires et le tamis, les particules présentant une densité élevée se déplaçant plus rapidement à travers la couche de particules auxiliaires et le tamis que les particules présentant une faible densité. L'invention concerne également un dispositif destiné à mettre en oeuvre ce procédé.

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