HEARTH BOTTOM, MORE PARTICULARLY FOR DC ARC FURNACES

The service durability of the hearth bottom of DC arc furnaces, in which steel rods embedded in the bottom act as the anode, is to be improved. To accomplish this, the bottom has, at least in the area of the steel rods (9), an upper fire-side layer (12) formed from chromic-oxide-containing magnesia...

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Bibliographische Detailangaben
Hauptverfasser:	HLAWATSCHEK, HARTMUT, SCHUBERT, MANFRED, BOHN, KURT, GELSDORF, GUNTER
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 FURNACES FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL HEATING KILNS LIGHTING MECHANICAL ENGINEERING METALLURGY METALLURGY OF IRON OPEN SINTERING OR LIKE APPARATUS OVENS PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OFWROUGHT-IRON OR STEEL RETORTS TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS WEAPONS
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Beschreibung
Zusammenfassung:	The service durability of the hearth bottom of DC arc furnaces, in which steel rods embedded in the bottom act as the anode, is to be improved. To accomplish this, the bottom has, at least in the area of the steel rods (9), an upper fire-side layer (12) formed from chromic-oxide-containing magnesia and a lower, organically bound graphite layer (14), as well as an intermediate layer (13) consisting of a mixture of the two materials.