| 摘要 |
PURPOSE:To provide the title brick which is of the prescribed value or below in the ratio of compression modulus/compressive strength and is excellent in spalling resistance, oxidation resistance, etc., by mixing a binder mixture composed of a specific compsn. with a mixture composed of a refractory material and carbon, then molding the mixture and drying the molding. CONSTITUTION:The binder mixture is produced by mixing a resin (e.g.; phenolic resin) contg. a monomer (e.g.; phenol) as well as tar and pitch. This binder mixture is then mixed with the mixture composed of the refractory material (e.g.; magnesia, alumina) and the carbon (e.g.; graphite) and the mixture is molded. The molding is dried by heating to >=200 deg.C in a nonoxidizing atmosphere. The uncalcined carbon-contg. brick having <=50 ratio of compression modulus/compressive strength when the compression modulus and the compressive strength are expressed in the same unit is thereby obtd. and, therefore, the amt. of the carbon to be added is decreased and the low-carbon brick is easily produced. |
