Jun 30, 2021
High Alumina Refractory Bricks
Product features：
1.High refractoriness
2.High-temperature strength
3.High thermal stability
4.Neutral refractory
5.Good resistance to acid and basic slag corrosion
6.High refractoriness under load
Physio-chemical Index of High Alumina Bricks :
| Items | First grade
high alumina brick |
Second grade
high alumina brick |
Third grade
high alumina brick |
Special grade
high alumina brick |
| LZ-75 | LZ-65 | LZ-55 | LZ-80 | |
| Al2O3 % ≥ | 75 | 65 | 55 | 82 |
| Fe2O3 % ≤ | 2.5 | 2.5 | 2.6 | 2.0 |
| Bulk Density g/cm3 | 2.5 | 2.4 | 2.3 | 2.6 |
| Cold Crushing Strength MPa ≥ | 70 | 60 | 50 | 80 |
| 0.2MPa Refractoriness Under Load ℃ | 1510 | 1460 | 1420 | 1550 |
| Refractoriness ℃ ≥ | 1790 | 1770 | 1770 | 1790 |
| Apparent Porosity % ≤ | 22 | 23 | 24 | 21 |
| Reheating Linear Change 1450℃×2h % | -0.3 | -0.4 | -0.4 | -0.2 |
Applications of High Alumina Bricks:
High alumina bricks are popularly used for the masonry of industrial kilns’ inner linings, such as blast furnaces, hot blast furnaces, electric furnace top, reverberator, rotary cement kiln, and so on. Besides, high alumina bricks are also widely used as regenerative checker bricks, stopper of the continuous casting system, nozzle bricks, etc.
