ELECTRIC ARC FURNACE

A direct current plasma arc furnace (1) for melting and/or treating a material by production of electric arcs and providing a molten product, the furnace (1) comprising; a tank (10) comprising: a crucible (12) delimiting a chamber (11) configured to receive material to be melted and/or treated; a pl...

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Bibliographische Detailangaben
Hauptverfasser:	EGUIZABAL LANDART, David, ONCALA AVILES, José Luis, ARTOLA PERNAS, Antxon, IPARRAGUIRRE ZABALETA, Jon Ander
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	BLASTING CHEMISTRY DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS,IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KINDOF FURNACE ELECTRIC HEATING ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR ELECTRICITY FERROUS OR NON-FERROUS ALLOYS FURNACES FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL HEATING KILNS LIGHTING MECHANICAL ENGINEERING METALLURGY METALLURGY OF IRON OPEN SINTERING OR LIKE APPARATUS OVENS PRETREATMENT OF RAW MATERIALS PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OFWROUGHT-IRON OR STEEL PRODUCTION AND REFINING OF METALS RETORTS TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FERROUS METALS WEAPONS
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Beschreibung
Zusammenfassung:	A direct current plasma arc furnace (1) for melting and/or treating a material by production of electric arcs and providing a molten product, the furnace (1) comprising; a tank (10) comprising: a crucible (12) delimiting a chamber (11) configured to receive material to be melted and/or treated; a plurality of refractory walls surrounding the outer surface of the crucible (12); and a metallic frame (15) covering the refractory walls; and a heating system configured for heating the received material, the heating system comprising a first electrode acting as cathode (13) and a second electrode (120) acting as anode, wherein the first electrode acting as cathode (13) is a movable electrode configured to project vertically into the chamber (11) delimited by the crucible (12). The crucible (12) is made of a material comprising at least 98% of synthetic graphite, the crucible (12) being part of an anode system also comprising said second electrode (120) and at least one part (12', 12'') connecting the crucible (12) and the second electrode (120), said crucible (12) having a double function: receiving and holding material to be melted and/or treated and providing electric conduction for the flow of current to heat said material, in such a way that, in use of the furnace (1), the voltage potential difference between the cathode (13) and any point of the surface of the crucible (12) defined to be in contact with the material to be melted and/or treated is the same. La présente invention concerne un four à arc à plasma à courant continu (1) pour la fusion et/ou le traitement d'un matériau par production d'arcs électriques et la fourniture d'un produit fondu, le four (1) comprenant : une cuve (10) comprenant : un creuset (12) délimitant une chambre (11) configurée pour recevoir un matériau devant être fondu et/ou traité ; une pluralité de parois réfractaires entourant la surface externe du creuset (12) ; et un cadre métallique (15) recouvrant les parois réfractaires ; et un système de chauffage configuré pour chauffer le matériau reçu, le système de chauffage comprenant une première électrode servant de cathode (13) et une deuxième électrode (120) servant d'anode, la première électrode servant de cathode (13) étant une électrode mobile configurée pour faire saillie verticalement dans la chambre (11) délimitée par le creuset (12). Le creuset (12) est constitué d'un matériau comprenant au moins 98 % de graphite synthétique, le creuset (12) faisant partie d'un système d'