Fire Proof 230*114*65mm Refractory Fire Bricks 55% Al2o3 , Furnaces
And Kiln Bricks
Fire-proof High Alumina Refractory Brick 230*114*65mm 55%Al2O3 for
Furnaces and Kilns
Category of Refractory Brick/Fire Brick:
a) According the made method, it can be divided into burnt brick,
unburned brick, and electric smelting brick.
b) According the shape and size, it can be divided into standard
brick, general brick and abnormal shape brick.
c) According the content of the Al2O3, it can be divided into fire
clay brick and high alumina brick.
Features:
Resistance to High temperature, Resistance to erosion, resistance
to abrasion;
Excellent compression strength;
Resistance to acid and alkali;
Excellent heat stability.
Application
The high alumina bricks are widely applied to industrial furnace,
glass furnace, chemical industrial furnace, utility industry
furnace lining, smelting furnace, and heat insulation ventilation
wall.
Properties of High Alumina Brick:
| Al2O3 (%) | ≥60 | ≥70 | ≥75 | 80 |
| SIO2 (%) | 32 | 22 | 20 | ≥18 |
| Fe2O3 (%) | ≤1.7 | ≤2.0 | ≤1.8 | ≤1.8 |
| Na2O+K2O(%) | <2.3 | <2.0 | <1.2 | |
| Refractoriness | 1790 | >1770 | >1790 | ≥1790 |
| refractoriness under load 0.2mpa(°C) | 1450 | >1510 | >1520 | ≥1520 |
| Porosity (%) | 22 | <22 | <21 | 20 |
| Bulk density(g/cm3) | 2.33 | 2.43-2.48 | 2.45-2.55 | 2.55 |
| Cold Cushing strength (Mpa) | ≥45 | ≥50 | ≥54 | ≥60 |
| Thermal expansion at 1000°C (%) | ≤0.3 | ≤0.3 | ≤0.3 | ≤0.3 |
| Reheating shrinking change(%) 1500°CX24h | -0.3 | -0.3 | -0.3 | -0.3 |
