Classifying – separating – and assorting solids – Magnetic – Paramagnetic
Patent
1976-01-29
1977-09-06
Lutter, Frank W.
Classifying, separating, and assorting solids
Magnetic
Paramagnetic
209223A, 209225, B03C 114
Patent
active
040466809
ABSTRACT:
A magnetic separator in which the substance to be treated is passed in one direction through a body of foraminous, magnetically susceptible material of significant extent, while traversing in another direction a magnetic field extending in still another direction, the directions being substantially orthogonal. Vibration is applied to the body, preferably linear and preferably in generally the direction of the field. The field opposes the passage of magnetic particles though the body while the vibrator promotes the passage of non-magnetic particles, so that they emerge from the body at different locations for separate collection. The body is conveniently a hollow cylinder built up of sections of magnetic stainless steel screening folded and shaped, and the movement of the body is preferably rotation, the substance being applied to an outer cylindrical surface of the body and emerging from an inner, concentric cylindrical surface. A structure comprising a plurality of such hollow cylinders spaced axially along a hollow drum is shown, with means for feeding the substance individually to the several cylinders: the cylinders pass between fixed magnets during a portion of their rotation. The substance to be fed may be dry or in a slurry: when the slurry is used, certain modifications of the apparatus are desirable to improve its efficiency, and are also disclosed.
REFERENCES:
patent: 3409139 (1968-11-01), Jackson et al.
patent: 3487941 (1970-01-01), Haapamaki
patent: 3947349 (1976-03-01), Fritz
Hill Ralph J.
Itasca Magnetics, Inc.
Lutter Frank W.
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