GRAPHITE-CONTAINING FIRE-RESISTANT BRICK FOR REFINING MELTED METAL

• Main Author: HAYAMA KIYOHISA
• Format: Patent
• Language: English
• Published: 15.06.1993
• Subjects: ARTIFICIAL STONE; BLASTING; CEMENTS; CERAMICS; CHEMISTRY; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS,IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KINDOF FURNACE; FURNACES; HEATING; KILNS; LIGHTING; LIME, MAGNESIA; MECHANICAL ENGINEERING; METALLURGY; METALLURGY OF IRON; OVENS; PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OFWROUGHT-IRON OR STEEL; REFRACTORIES; RETORTS; SLAG; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS; TREATMENT OF NATURAL STONE; WEAPONS

PURPOSE:To provide the subject brick especially useful as a furnace material for refining stainless steel, extremely low carbon steel, etc. CONSTITUTION:The objective brick is characterized by containing 5-80wt.% of a fireresistant raw material obtained by calcining or electrically melting 20-90wt.% of MgO, 5-80wt.% of Cr2O3, <= 10wt.% of SiO2, <=20wt.% of Al2O3 and <=20wt.% of Fe2O3, and further containing 3-30wt.% of graphite and 15-90wt.% of MgO as the remaining components. Thereby, this brick has excellent corrosion resistance, does not cause the formation of an opening at a sealing part between the bricks, exhibits an extremely smooth dissolution damage shape and has excellent spalling resistance. The properties permit that the brick is useful as a furnace material for refining stainless steel, extremely low carbon steel, etc., which require lining materials especially lowered in the carbon contents.