牌号 指标 | N-1 | N-2a | N-2b | N-3a | N-3b | N-4 | N-5 | N-6 | |
耐火度℃≥ | 1750 | 1730 | 1730 | 1710 | 1710 | 1690 | 1670 | 1580 | |
0.2Mpa荷重软化开始温度≥ | 1400 | 1350 | | 1320 | | 1300 | | | |
重烧线变化% | 1400℃2h | +0.1 -0.4 | +0.1 -0.5 | +0.2 -0.5 | | | | | |
1350℃2h | | | | +0.2 -0.5 | +0.2 -0.5 | +0.2 -0.5 | +0.2 -0.5 | | |
显气孔率%≤ | 22 | 24 | 26 | 24 | 26 | 24 | 26 | 28 | |
常温耐压强度Mpa℃≥ | 30 | 25 | 20 | 20 | 15 | 20 | 15 | 15 |
指标 牌号 | LZ-48 | LZ-55 | LZ-65 | LZ-75 |
AL2O3% ≥ | 48 | 55 | 65 | 75 |
耐火度℃≥ | 1750 | 1770 | 1790 | 1790 |
0.2Mpa荷重软化开始温度℃≥ | 1420 | 1470 | 1500 | 1520 |
显气孔率%≤ | 23 | 23 | 22 | 22 |
常温耐压强度Mpa≥ | 39.2 | 44.1 | 49 | 53.9 |