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Product introduction of high alumina refractory mortar
The main material of high alumina refractory mortar is high clinker, and the binder is soft clay or chemical binder. The content of alumina depends on the composition of the brick and the use requirements of the construction part. According to the different content of al_2o_3, high alumina refractory Malta is divided into ln-55a, ln-65a and ln-75a. The refractory Malta used in blast furnace construction should be within 2.5%. The fire resistance is 1750~1790 ℃, and the combustion loss is ≤ 5%.
Features of high alumina mortar
Good plasticity, workability, high adhesive strength, high corrosion resistance, high load softening temperature, heat shock resistance, drop resistance and corrosion resistance.
Applications of high alumina mortar
High alumina refractory Mortar is widely used in various high alumina brick industrial furnaces, such as hot blast furnace roof, regenerative chamber, combustion chamber, furnace roof and other construction, industrial furnace roof and furnace wall.
Product performance of high alumina mortar
| Item | GL-65 | GL-55 | GL-48 |
| Al2O3%, ≥ | 65 | 55 | 48 |
| Fe2O3%, ≤ | 2.0 | 2.0 | 2.0 |
| Refractoriness, ℃ | 1800 | 1780 | 1760 |
| 0.2MPa load softening start temperature, °C, ≥ | 1500 | 1480 | 1450 |
| Reburnishing line change1500℃, 2h1450℃, 2h | 0-0.2 – | 0-0.2 – | – 0-0.2 |
| Porosity, %≤ | 19 | 19 | |
| Normal temperature pressure resistance temperature, MPa≥ | 58.8 | 58.8 | 49 |