Method for concentrating ore slurries by means of intensive...

B - Operations – Transporting – 03 – D

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B03D 1/14 (2006.01) B03D 1/22 (2006.01)

Patent

CA 2070146

The present invention relates to a method for concentrating a certain mineral fraction attached to air bubbles from a slurry to the foam layer accumulated on the surface, so that the concentration takes place in three different mixing zones. The apparatus of the invention is formed of a colon-like flotation arrangement and of flow guides, a flow attenuator and an agitator belonging thereto. The flotation reactions are created in the bottom zone, wherefrom air bubbles and mineral particles carried by them are directed in a controlled fashion onto the surface of the apparatus. The flotation apparatus is so designed, that a strong agitation in the bottom zone can be used without causing harmful separation of the foam in the bottom part of the apparatus.

Méthode de concentration d'une certaine fraction de minéraux fixés aux bulles d'air d'une boue liquide à une couche de mousse accumulée sur la surface, de façon que la concentration se produise à trois différentes zones de mélange. L'appareil visé par cette invention est constitué d'un dispositif de flottation et de guides d'écoulement, d'un atténuateur de débit ainsi que d'un agitateur. Les réactions de flottation sont créées dans la zone inférieure, où les bulles d'air transportant les particules minérales sont dirigées de façon contrôlée sur la surface de l'appareil. L'appareil de flottation est conçu de manière à ce qu'une forte agitation dans la zone inférieure puisse se produire sans entraîner une séparation néfaste de la couche dans la partie inférieure de l'appareil.

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