Corundum Mullite Brick
Category:
Refractory Brick
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Details Introduction
Corundum mullite bricks are made from electric fused white corundum sand, alumina micro powder, and other main raw materials, mechanically mixed, formed under high pressure, and fired at high temperatures. The purity of white corundum sand and the process formula are used to meet the temperature requirements of different corundum products. The product has a dense structure, good high-temperature strength, high resistance to chemical corrosion and wear, strong stability, and is not affected by reducing gases such as H2 and CO.2and CO.
Main applications:
Corundum mullite bricks are mainly used in the petrochemical industry, large and medium-sized synthetic ammonia gasification furnaces, magnetic material gas furnace materials, high-temperature industrial kiln supporting materials, etc.
Physical and chemical indicators:
| Item |
Unit |
GMZ-88 |
GMZ-85 |
GMZ-80 |
GMZ-75 |
| Al2O3 |
% |
≥88 |
≥85 |
≥80 |
≥75 |
| Fe2O3 |
% |
≤0.8 |
≤1.0 |
≤1.0 |
≤1.2 |
| Apparent porosity rate |
% |
≤15 (17) |
≤16 (18) |
≤18 (20) |
≤18 (20) |
| Bulk density |
g/cm3 |
≥3.00 |
≥2.85 |
≥2.75 |
≥2.60 |
| Room temperature compressive strength |
Mpa |
≥120 |
≥100 |
≥100 |
≥80 |
| Load softening starting temperature (0.2MPa 0.6%) |
℃ |
≥1700 |
≥1680 |
≥1650 |
|
| Heating water long line change / %(1500℃×2h) |
% |
-0.1~0.1 |
-0.1~0.1 |
-0.2~0.2 |
-0.2~0.2 |
Key words:
Corundum Mullite Brick
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