Magnetic separator

US4272365A · kind A · utility

Assignee

• Klockner-Humboldt-Deutz AG · DE

Inventors

• Guenter Ries · Erlangen, DE
• Klaus-Peter Juengst · Blankenloch, DE
• Siegfried Foerster · Karlsruhe, DE
• Franz Graf · Burghausen, DE
• Wolfgang Lehmann · Bempflingen, DE
• Karl-Heinz Unkelbach · Neunburg vorm Wald, DE
• Gottfried Duren · Cologne, DE

Key dates

• Filing date: Feb 5, 1979
• Grant date: Jun 9, 1981
• Expiry date: Feb 5, 1999

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B03C1/035
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A magnetic separator, in particular a drum separator, includes a magnetic system having a plurality of magnets. Each of the magnets produces an open field directed toward a separation zone which, in a drum separator, extends axially of the drum outside of the surface of the drum. The magnets may include conductive coils, preferably superconducting coils, which are traversed in the same direction by current and which include an iron-free core. The average center-to-center spacing of the coils is a maximum of 25 times the spacing between the coils and the separating zone and is preferably in the range of 15:1 to 10:1. The coils are elliptical and have major and minor axes which decrease from the outermost coil winding to the innermost coil winding, with the distances between the windings being greater along the major axes than along the minor axes. This is a continuation of application Ser. No. 843,737, filed Oct. 19, 1977, now abandoned.