項(xiàng)目 | 熱風(fēng)爐用紅柱石磚 | ||
H55 | H62 | H65 | |
Al2O3 (%) | ≧55 | ≧62 | ≧65 |
Fe2O3 (%) | ≦1.2 | ≦1.2 | ≦1.2 |
顯氣孔率 (%) | ≦17 | ≦17 | ≦17 |
體積密度 (g/cm3) | ≧2.45 | ≧2.5 | ≧2.5 |
常溫耐壓強(qiáng)度 (MPa) | ≧60 | ≧60 | ≧60 |
蠕變率 20-50h/0.2Mpa, (%) | 1350°C | 1400°C | 1450°C |
﹤0.2 | ﹤0.2 | ﹤0.2 | |
荷重軟化溫度 (°C) | ≧1600 | ≧1650 | ≧1680 |
熱膨脹系數(shù) (1000°C) (%) | ≦0.55 | ≦0.55 | ≦0.55 |