High alumina brick for blast furnace by our company is made of high-grade bauxite as the main raw material, which is produced by batching, pressing, drying and high temperature firing. It is a refractory product used for the lining of blast furnace.
| Items | Behaviors | |||
| GL-65 | GL-55 | GL-48 | ||
| Al2O3 , % ≥ | 65 | 55 | 48 | |
| Fe2O3≤ | 2.0 | |||
| Refractoriness, ℃ ≥ | 1790 | 1780 | 1760 | |
| Refractoriness under load(0.2MPa) °C≥ | 1500 | 1480 | 1450 | |
| Permanent Linear Change % ≤ | 1500℃，2h |
+0 -0.2 |
- | |
| 1450℃,3h | - |
+0 -0.2 |
||
| Apparent Porosity,% ≤ | 19 | 18 | ||
| Cold Crushing Strength, Mpa ≥ | 58.0 | 49.0 | ||
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