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Combination bricks for blast furnace tapping hole
Numbering
Affiliate classification High-alumina brick for blast furnace
Weight 0
Product Description
Product Overview:
High-alumina brick for blast furnace is a refractory product which is calcined high-quality high-alumina bauxite clinker and binder first through granulation and pulverization processes, mixed at a certain ratio, and then press-molded and fired at high temperature. According to the physical and chemical indicators, it is divided into three grades: GL-65, GL-55, and GL-48. Mainly used for masonry blast furnace below the belly.
Physical and chemical indicators：
| Item | Indicator | ||
| GL-65 | GL-55 | GL-48 | |
| Al2O3 % ≥ | 65 | 55 | 48 |
| Fe2O3 % ≤ | 2.0 | ||
| Refractory ℃ | 1800 | 1780 | 1760 |
| Apparent porosity % ≤ | 19 | 19 | 18 |
| Compressive strength at room temperature Mpa ≥ | 58.8 | 49 | 49 |
| 0.2MPaLoad softening start temperature ℃ ≥ | 1500 | 1480 | 1450 |
| Reburning line change % |
1500℃×2h -0.2～+0 |
1450℃×2h -0.2～+0 |
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