SAETT ATT ANRIKA MALMSUSPENSION MED HJAELP AV KRAFTIG FOERBEREDANDE BLANDNING OCH SAMTIDIG FLOTATION SAMT ANORDNINGAR FOER GENOMFOERANDE AV DETTA.

摘要

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.