1. Characters for anti-alkali fireclay bricks for cement rotary kiln:
The raw materials of the anti-alkali bricks is clay with low content of alumina. This kind of fireclay bricks has good corrosion resistance to alkali.
2. Applications:
Used in work layers of preheating in cement rotary kiln and middle temperature zone of cooler.
3. Physical and Chemical Index:
Mark |
Normal Type |
Chemical composition (%) |
Al2O3 |
25~30 |
Fe2O3 |
≤2 |
SiO2 |
65~70 |
Refractoriness(℃) |
≥1650 |
Density(g/cm3) |
2.1 |
Apparent porosity (%) |
≤25 |
Compressive strength (MPa) |
≥25 |
Refractoriness under load T0.6（℃）﹚ |
≥1350 |
Thermal expansion rate(900℃) [%] |
0.7 |
Thermal conductivity/ (350℃) [W/(m·K) ] |
1.28 |
Thermal shock resistance（1100℃→water cold）[times] |
≥10 |