| 摘要 |
PROBLEM TO BE SOLVED: To provide a carbon containing castable refractory having the ability to inhibit structure spalling even when it is repeatedly used while hating, improved resistance to thermal impact, thereby the formation of exfoliation and crack is prevented, improved in resistance to infiltration of slag by carbon, thereby softening and melting of the refractory by infiltration of the slug can be inhibited, and improved in durability, which refractory is produced by using alumina raw material as the main component of its aggregate and its matrix, and further, controlling components contained in the matrix. SOLUTION: In the castable refractory, alumina raw material is used as the main component of its aggregate having particle diameters more than 0.3 mm and of its matrix having particle diameters of <=0.3 mm. The castable refractory contains 2 to 8 wt.% alumina cement, 2 to 8 wt.% magnesia raw material, 0.3 to 2 wt.% amorphous silica raw material and 0.5 to 3 wt.%, expressed in terms of the residual carbon, of a carbonaceous raw material, as the components of the matrix. |
