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US 4,072,814 AGranted
Furnace for melting metal by the Joule effect
AssigneesInstitut de Recherches de la Siderurgie Francaise (IRSID), Instruments S.A.
InventorPierre G. Boillot
Life of this patent
Estimating the term…
Abstract
A furnace for melting metal by the Joule effect to enable extraction of gases contained in the metal comprising a hollow tubular body which constitutes a heater resistor clamped between two electrodes, and a separate crucible for the metal which is supported within the tubular body and out of direct contact with the electrodes.
Claims3
A device for melting a metal by Joule effect to enable extraction of the gases which the metal contains, said device comprising:
- a hollow, tubular, vertical body constituted of graphite having high mechanical resistance and constituting a heater resistor,
- an upper and a lower heating electrode between which said tubular body is clamped, and a crucible of heat-conductive, porous material disposed in the interior of the hollow body and in open electrical circuit with said electrodes, said crucible being hollow for containing metal to be melted and having a bottom for said metal, and means for positioning said bottom above the lower electrode in thermal isolation therewith.
Dependencies are inferred from the claim text.