кликнуть картину и смотреть оригинал
| item | rl-65 | rl-55 | rl-48 | |
| al2o3 % | ≥65 | ≥55 | ≥48 | |
| refractoriness,℃ | ≥1780 | ≥1760 | ≥1740 | |
| 显气孔率 % | ≤22（24） | |||
| 常温耐压强度ccs,mpa | ≥50 | ≥45 | ≥40 | |
| rul,0.2mpa，℃ | ≥1500 | ≥1470 | ≥1420 | |
| linear changes on reheating（%） | 1500℃×2h | 0.1～-0.4 | 0.1～-0.4 | / |
| 1450℃×2h | / | 0.1～-0.4 | ||
| thermal shock resistance (1100℃,water cooling）,cycle |
（roof、wall）≥6 | |||
| note：the value in brackets is for checker of regenerator. | ||||
