指标Index 项目Item | 高铝砖High alumina brick | 微膨胀高铝砖Micro expansion high alumina brick | ||
LXGL-75 | LXGL-65 | LXGL-55 | LXWPL-75 | |
Al₂O₃ (%)≥ | 75 | 65 | 55 | 75 |
Fe₂O₃ (%)≤ | 2.0 | 2.0 | 2.5 | 2.0 |
显 气 孔 率 ( % ) ≤Apparent Porosity | 20 | 22 | 23 | 19 |
体积密度(a/cm³)≥Bulk Density | 2.5 | 2.4 | 2.3 | 2.6 |
常温耐压强度(MPa)≥Cold Crushing Strength | 60 | 55 | 40 | 70 |
0.2MPa荷重软化开始温度(C)≥0.2MPa Refractoriness Under Load | 1500 | 1470 | 1450 | 1520 |
重烧线变化率(1500℃×2h,%)Refiring linear change | 0~-0.2 | 0~-0.2 | ±0.2 | 0~+0.6 |
耐火度(C)≥Refractoriness | 1790 | 1790 | 1770 | 1790 |