High-alumina castable
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Refractory castable
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Details Introduction
High alumina castable is Al2O3High alumina aggregate with a content greater than 75% is a granular raw material, combined with high alumina powder and additives to form an amorphous refractory castable with an overall aluminum content >55%. After initial setting, standard curing for 28 days can achieve a compressive strength of 40~60MPa. Its characteristics include slow hydration speed, high late strength, and high refractoriness.
| Grade |
GL-85 |
GL-70 |
GL-60 |
GN-50 |
GN-42 |
| Al2O3,% ≥ |
85 |
70 |
60 |
50 |
42 |
| Refractoriness,℃ ≥ |
1780 |
1720 |
1700 |
1660 |
1640 |
| Rate of linear change after firing ≤±1% at test temperature (insulation for 3h),℃ |
1500 |
1450 |
1400 |
1400 |
1350 |
| Compressive strength MPa ≥ after drying at 110±5℃ |
35 |
35 |
30 |
30 |
25 |
| Flexural strength MPa ≥ after drying at 110±5℃ |
5 |
5 |
4 |
4 |
3.5 |
Key words:
High-alumina castable
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