REFRACTORY FOR MELTING AND REFINING FURNACE FOR AL-LI ALLOY

PURPOSE:To obtain a refractory for melting and refining Al-Li alloys less in influence on alloy components and excellent in infiltration resistance and deterioration resistance to molten alloys by incorporating silicon nitride into an alumina refractory. CONSTITUTION:A precast crucible is manufactur...

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Bibliographische Detailangaben
Hauptverfasser:	WAKASAKI OSAMU, OKA KAZUYOSHI, OSONO TOMOYA, HAYASHI YUICHIRO
Format:	Patent
Sprache:	eng
Schlagworte:	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 FERROUS OR NON-FERROUS ALLOYS FURNACES FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL HEATING KILNS LIGHTING LIME, MAGNESIA MECHANICAL ENGINEERING METALLURGY OPEN SINTERING OR LIKE APPARATUS OVENS PRETREATMENT OF RAW MATERIALS PRODUCTION AND REFINING OF METALS REFRACTORIES RETORTS SLAG TREATMENT OF ALLOYS OR NON-FERROUS METALS TREATMENT OF NATURAL STONE WEAPONS
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Beschreibung
Zusammenfassung:	PURPOSE:To obtain a refractory for melting and refining Al-Li alloys less in influence on alloy components and excellent in infiltration resistance and deterioration resistance to molten alloys by incorporating silicon nitride into an alumina refractory. CONSTITUTION:A precast crucible is manufactured by the above refractory obtd. by blending an alumina refractory contg., by weight, >=85% Al2O3 components (such as an alumina unshaped refractory contg. 96% Al2O3 and contg., as impurities, 0.5% SiO2, 0.5% Fe2O3 and 1.4% CaO) with 5 to 10% powder of silicon nitride (such as the one contg. 98% Si3N4, 1% SiO2,