Industrial electric heating furnaces – Induction furnace device – Coreless
Patent
1984-01-06
1985-10-29
Tolin, G. P.
Industrial electric heating furnaces
Induction furnace device
Coreless
219 1049R, F27B 1410, H05B 116
Patent
active
045504121
ABSTRACT:
An induction furnace for melting and casting highly pure metals and alloys such as uranium and uranium alloys in such a manner as to minimize contamination of the melt by carbon derived from the materials and the environment within the furnace. The subject furnace is constructed of carbon free materials and is housed within a conventional vacuum chamber. The furnace comprises a ceramic oxide crucible for holding the charge of metal or alloy. The heating of the crucible is achieved by a plasma-sprayed tungsten susceptor surrounding the crucible which, in turn, is heated by an RF induction coil separated from the susceptor by a cylinder of inorganic insulation. The furnace of the present invention is capable of being rapidly cycled from ambient temperatures to about 1650.degree. C. for effectively melting uranium and uranium alloys without the attendant carbon contamination problems previously encountered when using carbon-bearing furnace materials.
REFERENCES:
patent: 3470304 (1969-09-01), Geringer
patent: 3916047 (1975-10-01), Niesen
patent: 4351058 (1982-09-01), Florian et al.
Holcombe Cressie E.
Masters David R.
Pfeiler William A.
Hamel Stephen D.
Hightower Judson R.
Larcher Earl L.
The United States of America as represented by the United States
Thompson Gregory D.
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