Glass induction melting furnace using a cold crucible
AssigneeCommissariat a l'Energie Atomique
InventorsRoger Boen, Armand Bonnetier, Christian Ladirat
Life of this patent
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Abstract
A melting furnace for insulating materials is provided with a cooled crucible (10) having continuous metal side malls, a partitioned and cooled bottom (12) and at least one induction coil (28) placed under the bottom which serves as the sole heating means. The depth of the melting bath contained in the crucible and the excitation frequency of the induction coil are selected so that the depth and half of the inside radius of the crucible are less than the skin thickness of the bath.
Claims8
Melting furnace for insulating materials, comprising a cooled crucible (10, 32) with metal side walls, a partitioned and cooled bottom (12) and at least one induction coil (28, 34) serving as a heating means and placed under the bottom;
- characterized in that said at least one induction coil is the only means of heating and that the metal side wall of the crucible is continuous.
Melting furnace for insulating materials, comprising a cooled crucible (10, 32) with metal side walls, a partitioned and cooled bottom (12) and at least one induction coil (28, 34) serving as a heating means and placed under the bottom;
- characterized in that the melting furnace comprises a metal base (14) and a metal lid (16) which, together with the crucible (10, 32) to which they are connected, form a cage protecting the outside environment from radiation generated by the induction coil (28, 34) and wherein said at least one induction coil is the only means of heating and that the metal side wall of the crucible is continuous.
Melting furnace for insulating materials, comprising a cooled crucible (10, 32) with metal side walls, a partitioned and cooled bottom (12) and at least one induction coil (28, 34) serving as a heating means and placed under the bottom;
- characterized in that the melting furnace has a rectangular shape with a continuous metal side wall and wherein said at least one induction coil is the only means of heating and distributed along the long axis of the rectangle and controlled independently.
Dependencies are inferred from the claim text.