PRODUCTION OF UNBURNED MAGNESIA-CARBON BRICK

PURPOSE:To obtain unburned magnesia-carbon brick excellent in oxidation resistance without causing a rise in thermal stress and deterioration in corrosion resistance. CONSTITUTION:A method for producing unburned magnesia-carbon brick is characterized in that boron-modified novolak type phenolic resi...

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Bibliographische Detailangaben
Hauptverfasser:	NAKANO KOICHI, MORISHIGE KAZUO, HANAGIRI SEIJI, TANAKA MASAHITO
Format:	Patent
Sprache:	eng
Schlagworte:	ARTIFICIAL STONE CEMENTS CERAMICS CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS CONCRETE LIME, MAGNESIA METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS REFRACTORIES SLAG THEIR PREPARATION OR CHEMICAL WORKING-UP TREATMENT OF NATURAL STONE
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Beschreibung
Zusammenfassung:	PURPOSE:To obtain unburned magnesia-carbon brick excellent in oxidation resistance without causing a rise in thermal stress and deterioration in corrosion resistance. CONSTITUTION:A method for producing unburned magnesia-carbon brick is characterized in that boron-modified novolak type phenolic resin prepared by modifying a novolak type phenolic resin with boron or boron oxide is added to 100wt.% blend of 3-40wt.% carbon and the remainder of magnesia clinker as principal materials and the resultant mixture is kneaded and then formed. No skew breaking is present at all in the magnesia-carbon brick produced by this invention and the formation of a decarbonized layer near the operating surface is extremely rare. As a result, excellent corrosion resistance held by the magnesia-carbon brick is satisfactorily exhibited and use durability remarkably improved as compared with that of conventional materials is obtained a obviously from the results of the aforementioned actual machine tests.