STUDY ON MAGNETIC FLUIDIZATION OF GROUP-C POWDERS

The fluidization behavior of Geldart's group C powders has been studie d and the experiments demonstrate that channels and bubbles can be eli minated effectively. Theoretical analysis shows that the fluidization quality is improved due to the formation of a chain structure. Two opt ical fiber probes are used to measure the size of the bubble in the be d and it shows that the bubble size decreases with increasing magnetic field intensity and magnetic powder fraction. The length of the chain , obtained by using a CA5300 board and modular system, has been found to be strongly influenced by the magnetic field intensity. A mathemati cal model has been derived through theoretical analysis and the calcul ated results are in agreement with experimental data. A dimensionless number M(h) is developed to forecast the magnetically condensed state.