Classifying – separating – and assorting solids – Special applications
Patent
1995-08-31
1998-10-13
Bollinger, David H.
Classifying, separating, and assorting solids
Special applications
209725, B03B 900
Patent
active
058199454
ABSTRACT:
The present invention provides a method for separation of fine particles in a bimodal (two component) dense medium. In accordance with the present invention, the dense medium comprises ferromagnetic particles that have a relative density range from about 4.0 to 7.0 suspended in water and are characterized by a bimodal size distribution. Such a medium exhibits high stability and favourable rheological properties. The use of such a bimodal magnetite dense medium in cleaning fine coal in a dense medium cyclone or dynamic dense medium separator results in optimum separation efficiency when the medium contains approximately 20-40% fine and 60-80% coarse magnetite, and when the size ratio of coarse-to-fine magnetite is in the range of 5 to 10.
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He Ying Bin
Laskowski Janusz S.
Bollinger David H.
University of British Columbia
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