DocumentCode :
958649
Title :
Magnetic separation of the second kind: Magnetogravimetric, magnetohydrostatic, and magnetohydrodynamic separations
Author :
Khalafalla, S.E.
Author_Institution :
Bureau of Mines, Twin Cities, Minnesota
Volume :
12
Issue :
5
fYear :
1976
fDate :
9/1/1976 12:00:00 AM
Firstpage :
455
Lastpage :
462
Abstract :
Magnetogravimetric, magnetohydrostatic, and magnetohydrodynamic separation techniques can be classified as magnetic separations of the second kind. Magnetic separation of the first kind (ordinary magnetic separation) relies on the inherent magnetic susceptibility of the material to be separated. When the medium of separation rather than the separated particles is made magnetizable, a new system of gravity separations can result (magnetic separation of the second kind). In magnetogravimetry, a colloidal solution of a ferro- or ferrimagnetic substance (magnetic fluid) acts as the separation medium. Magnetohydrostatic separations are conducted in an aqueous solution (or melt) of a strongly paramagnetic salt. Magnetohydrodynamics applies the Faraday effect (mutual orthogonality of the force thrust, electric, and magnetic fields) on suspended conducting minerals in an electrolytic solution placed in crossed electric and magnetic fields. The first technique was pioneered mainly in the United States, while the last two techniques were pioneered by Bunin and Andres in the Soviet Union and introduced to the West by Andres. The principles underlying the three separation techniques will be discussed.
Keywords :
MHD; Magnetic separation; Faraday effect; Ferrimagnetic materials; Gravity; Magnetic levitation; Magnetic liquids; Magnetic materials; Magnetic separation; Magnetic susceptibility; Magnetohydrodynamics; Paramagnetic materials;
fLanguage :
English
Journal_Title :
Magnetics, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9464
Type :
jour
DOI :
10.1109/TMAG.1976.1059074
Filename :
1059074
Link To Document :
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