| 摘要 |
To provide a ceramic aggregate for refractories, which enables a refractory to exhibit excellent spalling resistance. This ceramic aggregate for refractories is configured to have (a) a chemical composition that contains 50% by weight or more of Al2O3, 50% by weight or less of SiO2 and 10% by weight or less of impurities, (b) a columnar shape having a length in the major axis direction (L) of 100 mm or less, a length in the minor axis direction (D) of 3 mm or more and an aspect ratio (L/D) of 1.5 or more, and (c) a surface roughness (Ra) of 10 μm or less and a maximum height (Ry) of 100 μm or less. |
