NDLI: Electromagnetic separation techniques in metal casting. II. Separation with superconducting coils

Content Provider	IEEE Xplore Digital Library
Author	Markarov, S. Ludwig, R. Apelian, D.
Copyright Year	1965
Abstract	The second part of this paper is devoted to the use of dc superconducting coils for electromagnetic separation of small nonconducting inclusions in metal casting. We theoretically analyze two methods: 1) magnetohydrodynamic separation with an electric current induced by a mean flow (conical separator) and 2) electromagnetic separation with an externally injected electric current (helical separator). First, the paper develops a model of the conical separator proposed by Gillon and Pillin in 1998 and compares it with experiments. It states that the main reason for poor separation efficiency can be flow inhomogeneity and turbulence in the separation channel. Second, the paper introduces a model of the electromagnetic separator with an injected current. Such a model has a number of advantages including better performance and higher flow homogeneity. It is capable of separating of nonconducting inclusions on the order of 10 /spl mu/m in size in a magnetic field of 8 T with a flow rate of 1 kg/s. Power efficiency of the electromagnetic separation is studied with respect to the accompanying Joule's heating of molten metal. It is found that the electromagnetic separator with a superconducting coil and an injected current has the highest power coefficient, at least 100 times greater than the efficiency of conventional separation devices.
Sponsorship	IEEE Magnetics Society
Starting Page	1024
Ending Page	1031
Page Count	8
File Size	148656
File Format	PDF
ISSN	00189464
Volume Number	37
Issue Number	2
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2001-03-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Casting Particle separators Superconducting coils Current Electromagnetic analysis Magnetic analysis Magnetohydrodynamic power generation Electromagnetic modeling Magnetic fields Electromagnetic heating
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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