Influence of particle shape on forces in magnetic separators

Author

Lileg, Klemens ; Schnizer, Bernhard

Author_Institution

Inst. fuer Theor. Phys., Tech. Univ. Graz, Austria

Volume

25

Issue

5

fYear

1989

fDate

9/1/1989 12:00:00 AM

Firstpage

4292

Lastpage

4297

Abstract

The solution obtained by J.A. Stratton (1941) for an ellipsoidal paramagnetic particle in a homogeneous magnetic field is adapted for easy numerical evaluation. This is done to estimate the influence of the shape of particles on forces in magnetic separation. Calculations are carried out for a particle with a uniform volume susceptibility of 0.1; the susceptibility of the surrounding medium is zero. The ratios of the semiaxes of the ellipsoid do not exceed 1:10. Under these assumptions, the direction of the interior field differs from that of the primary field by a few degrees at the most. The magnetic moment differs from that of a sphere of equal volume by about 5% at the most. Also, torque is rather small

Keywords

magnetic separation; magnetic susceptibility; paramagnetism; ellipsoidal paramagnetic particle; homogeneous magnetic field; interior field; magnetic moment; magnetic separators; particle shape; primary field; torque; uniform volume susceptibility; Boundary value problems; Ellipsoids; Magnetic fields; Magnetic moments; Magnetic separation; Magnetostatics; Paramagnetic materials; Particle separators; Shape; Torque;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.42595

Filename

42595