US 4,761,528 AGranted

High frequency induction melting furnace

AssigneeCommissariat a l'Energie Atomique

InventorsBruno Caillaut, Rene Perrier de la Bathie, Jacques Terrier

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Abstract

An induction furnace for melting refractory materials into a molten state by induction from a high frequency alternating current source. The furnace comprises a material holding crucible formed by a substantially cylindrical side wall having a single cylindrical turn. The side wall terminates in end portions which are spaced apart from each other to define a slot therebetween which extends generally longitudinally of the cylindrical wall. The side wall portions are connected to the source of alternating current so that the side wall turn comprises both the crucible and an inductor. An electrically conductive, elongated cooled member is mounted in the slot in spaced relation between each of the end portions. The elongated member is electrically insulated from the end portions to increase the breakdown voltage between the end portions.

Claims11

Dependent claims

A melting furnace for melting refractory materials into a molten state by induction from a high frequency alternating current source, said furnace comprising:

a material holding crucible which includes a bottom wall and a substantially longitudinally extending, electrically conducting cylindrical side wall having a single cylindrical turn, said side wall turn having end portions spaced apart from each other to define a slot therebetween which extends generally longitudinally of said cylindrical side wall;
means connecting an alternating current source between said side wall turn end portions so that said cylindrical side wall turn constitutes both said crucible and an inductor;
at least one elongated member made from an electrically conducting material mounted in said slot in spaced relation from each of said side wall end portions and electrically insulated from said cylindrical wall, and
means for cooling said elongated member.

1 more element

Dependencies are inferred from the claim text.