Dependence of Granular Matrix Demagnetizing Factor on the Matrix Relative Size

Alexander V. Sandulyak; Anna A. Sandulyak; Petr N. Shkatov

doi:10.4028/www.scientific.net/AMR.1083.32

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Dependence of Granular Matrix Demagnetizing Factor on the Matrix Relative Size

Abstract:

We note that for a wide range of porous, especially granular, ferromagnetics used as matrices of magnetic filter-separators, there is still an issue of defining their demagnetizing factor N which has a dramatic effect on the values of average magnetic permeability of these operating units of filter-separators. The work aims at filling the existent gaps in the issue, we supply N values depending on the relative size of such magnets as well as a respective generalizing phenomenological dependence which is characterized by an exponential realtion between the demagnetizing factor and relative size radical. The established relation allows obtaining real values of magnetic permeability of a short filter matrix thus providing an unbiased comparative estimate of its technological workability.