Levitational melting of several kilograms of metal with a cold crucible

Author

Tadano, Hideaki ; Fujita, Michiru ; Take, Tatsuo ; Nagamatsu, Katsuaki ; Fukuzawa, Akira

Author_Institution

Fuji Electr. Corp. Res. & Dev. Ltd., Chiba, Japan

Volume

30

Issue

6

fYear

1994

fDate

11/1/1994 12:00:00 AM

Firstpage

4740

Lastpage

4742

Abstract

A cold crucible is useful for contactless melting of metals. Metals and alloys can be refined to high degrees of purity with cold crucibles. The construction of a crucible strongly influences the melting conditions of molten metal. In this paper, crucible construction is examined in experimental investigations and electromagnetic analyses. The results obtained demonstrate that a crucible with many slits is good for melting metals, and that a crucible with a cone-shaped inside and coils equidistant from the molten metal in the crucible is best for levitational melting. We have successfully levitated and melted 2.3 kg of Ti with an improved crucible in two to three minutes

Keywords

magnetic levitation; melting; titanium; 2.3 kg; Ti; cold crucible; cone-shaped inside; contactless melting; electromagnetic analyses; levitational melting; melting conditions; metals; Coils; Eddy currents; Electromagnetic analysis; Frequency; Infrared spectra; Magnetic analysis; Magnetic forces; Research and development; Shape memory alloys; Temperature distribution;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.334207

Filename

334207