| 摘要 |
PROBLEM TO BE SOLVED: To improve the thermal impact resistance of a zirconia-graphite refractory without deteriorating the corrosion resistance of the zirconia-graphite refractory and maintain the balance of both the characteristics. SOLUTION: This refractory contains zirconia granules having granule diameters of >=0.2 mm, zirconia granules having granule diameters of <0.2 mm, and graphite as main components. Therein, the zirconia granules having granule diameters of >=0.2 mm are coated with coating layers comprising a mixture consisting mainly of zirconia granules having granule diameters of <0. 2 mm and graphite, and the rate of the graphite at parts brought into contact with the zirconia of the coating layers is higher than that at parts except the coarse zirconia granules. |
