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High alumina bricks for hot air ducts
Numbering
Affiliate classification High-alumina brick for hot-blast furnace
Weight 0
Product Description
Product Overview:
High-alumina brick for hot-blast furnace is a refractory product which is calcined high-quality high-alumina bauxite clinker and binder first through granulation and pulverization processes, mixed in a certain proportion, and then press-molded and fired at high temperature. According to the physical and chemical indicators, it is divided into three brands: RL-65, RL-55, and RL-48. Mainly used for masonry hot blast stove wall.
Physical and chemical indicators：
| Item | Indicator | ||
| RL-65 | RL-55 | RL-48 | |
| Al2O3 % ≥ | 65 | 55 | 48 |
| Refractory ℃ ≥ | 1780 | 1760 | 1740 |
| Apparent porosity % ≤ | 22(24) | 22(24) | 22(24) |
| Compressive strength at room temperature Mpa ≥ | 50 | 45 | 40 |
| 0.2MPaLoad softening start temperature ℃ ≥ | 1500 | 1470 | 1420 |
| Reburning line change % |
1500℃×2h -0.4～+0.1 |
1450℃×2h -0.4～+0.1 |
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