Fundamentals of a magnetically stabilized fluidized bed for coal separation

The performance of a magnetically stabilized fluidized bed is strongly affected by the properties of the air-fluidized dense medium, especially for the dry fine coal separation. The successful design and operation of a magnetically stabilized fluidized bed system for dry coal separation depend on the ability to accurately predict the fundamental properties of the fluidized bed, particularly the fluidized bed's rheological properties and density. These properties are controlled and modified by magnetic field intensity and medium composition. The composition variables include medium density, magnetite particle size distribution, particle shape, and level of contamination. Some of these fundamentals of a magnetically stabilized fluidized bed for dry coal separation are described in this paper.