With high refractoriness,compression strength and chemical corrosion resistance.anti alkaline/acid erosions.
Characteristics:
The main mineral component is mullite and corundum phases, with excellent high-temperature physical properties and chemical corrosion resistance, anti alkaline/acid erosions, good strength under high temperature and good thermal shock resistance, high spalling resirtance.
Applications: Widely used in every part of blast furnace lining with good work ability.
Specifications:
Item | Index | |||
Code | GL-48 | GL-55 | GL-65 | GL-75 |
Al2O3 min % | 48 | 55 | 65 | 75 |
Fe2O3 max % | 2 | 2 | 2 | 2 |
Refractoriness , min | 1750 | 1770 | 1790 | 1790 |
Refractoriness under load(0.2MPa) , min | 1450 | 1480 | 1500 | 1520 |
Linear change after reheating(1500 C, 2h) % | 0 ~ 0.2*1450 | 0 ~ 0.2 | 0 ~ 0.2 | 0 ~ 0.2 |
Apparent porosity max % | 18 | 19 | 19 | 19 |
Cold crushing strength Mpa min | 49.0 | 49.0 | 58.8 | 70.0 |
high alumina brick for blast furnace
