METHOD FOR EXECUTING REPAIR OF MONOLITHIC REFRACTORY LINING

PROBLEM TO BE SOLVED: To develop secure joint strength at an extension execution boundary by executing extension repair by coating the surface in the eroded part of the lining of a vessel for molten metal with an intermediate material of a specific compsn., then selectively heating the intermediate...

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Bibliographische Detailangaben
Hauptverfasser:	TSUTSUI KOJI, TAIRA HATSUO, SUKENARI SHIRO
Format:	Patent
Sprache:	eng
Schlagworte:	ARTIFICIAL STONE BLASTING CASTING CASTING OF METALS CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES 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 ELECTRIC HEATING ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR ELECTRICITY FURNACES HEATING KILNS LIGHTING LIME, MAGNESIA MECHANICAL ENGINEERING METALLURGY METALLURGY OF IRON OVENS PERFORMING OPERATIONS POWDER METALLURGY PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OFWROUGHT-IRON OR STEEL REFRACTORIES RETORTS SLAG TRANSPORTING TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS TREATMENT OF NATURAL STONE WEAPONS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To develop secure joint strength at an extension execution boundary by executing extension repair by coating the surface in the eroded part of the lining of a vessel for molten metal with an intermediate material of a specific compsn., then selectively heating the intermediate material by irradiation with microwaves. SOLUTION: The compsn. of the intermediate material 4 used for repair of the lining material 2 to be repaired on the permanent bricks of the vessel 1 for molten metal, such as a ladle for steel making is composed to contain, by weight %, 50 to 80% alumina of a grain size below 50 μm, 10 to 40% SiC or C powder of a grain size below 50 μm and 3 to 10% org. binder. This material is coated at 5 to 10 mm thickness on the repair surface and the lining material for repair is jointed by the conventional method and is aged and dried. The repair surface is thereafter irradiated with the microwaves and the intermediate material 4 is heated to >=1200 deg.C to form a chemical bond phase at the extension boundary. The alumina of the compsn. of the intermediate material 4 may be replaced with magnesia and the material may be heated to >=1500 deg.C.