| 摘要 |
PROBLEM TO BE SOLVED: To provide a highly durable castable refractory for molten metal container lid which has excellent heat retaining property, and which has excellent thermal shock resistance, falling shock resistance, mechanical strength, as well as excellent resistance against various different damage factor such as corrosion resistance, while having basic property required for lid material such as light in weight.SOLUTION: There is provided castable refractory for molten metal container lid in which fire resistant ingredient comprises, relatively to 100 mass% of the fire resistant ingredient: (A) 50 to 65 mass% of fire resistant particle having 1.30 to 1.70 g/cmof bulk specific gravity, and 8 to 0.3 mm of particle diameter (30 to 45 mass% of particles having 8 to 1 mm of particle diameter, and 15 to 25 mass% of particles having 1 to 0.3 mm of particle diameter); (B) 5 to 12 mass% of expansive fire resistant particle exerts expanding ability when being heated at 1000°C or more; (C) 3 to 12 mass% of fire resistant fine particles having 10 μm or less of median diameter; (D) 15 to 25 mass% of alumina cement; and (E) remaining fire resistant particles having 0.3 mm or less of particle diameter.SELECTED DRAWING: None |
