Application of Aluminum-Silicon Refractory Brick in Cement Rotary Kiln
The aluminum-silicon refractory bricks are mainly used in preheaters, decomposing furnaces, tertiary air ducts, kiln door covers, grate coolers, cement rotary kiln decomposition zones, and upper and lower transition zones.
The aluminum-silicon refractory bricks mainly include alkali-resistant refractory bricks, anti-stripping high alumina bricks, silica-mullite series refractory bricks, and high-load soft phosphates bricks.
The physical and chemical indicators of the above mentioned bricks are as follows:
alkali-resistant refractory brick
| Refractory Name | Chemical Composition (Al2O3) % | C.C.S (MPa) | Alkali Resistance |
| Ordinary Alkali-Resistant Brick | 25~40 | ≥30 | I |
| High-Strength Alkali-Resistant Brick | 25~40 | ≥60 | I |
anti-stripping high alumina brick
| Refractory Name | Chemical Composition % | Bulk Density (g/cm3) | Apparent Porosity (%) | CSS (MPa) | Refractoriness Under Load (℃) (0.2MPa, T0.6) |
Thermal Shock Resistance (Cycle) (1100℃，water quenching) |
|
| Al2O3 | ZnO2 | ||||||
| anti-stripping high alumina brick | ≥70 | ≥6.0 | ≥2.55 | ≤22 | ≥60 | ≥1470 | ≥20 |
| ≥70 | – | ≥2.55 | ≤20 | ≥60 | ≥1470 | ≥15 | |
Silicon carbide mullite refractory brick
| Refractory Name | Chemical Composition % | Bulk Density (g/cm3) | Apparent Porosity (%) | CSS (MPa) | Refractoriness Under Load (℃) (0.2MPa, T0.6) |
Thermal Shock Resistance (Cycle) (1100℃， water quenching) |
Abrasion at Ambient Temperature (cm³) | |
| Al2O3 | SiO2+SiC | |||||||
| Silicon carbide mullite refractory brick | ≥65 | ≥30 | ≥2.60 | ≤19 | ≥85 | ≥1650 | ≥10 | ≤8 |
| ≥63 | ≥30 | ≥2.60 | ≤19 | ≥90 | ≥1600 | ≥10 | ≤8 | |
| ≥60 | ≥30 | ≥2.55 | ≤19 | ≥90 | ≥1550 | ≥12 | ≤8 | |
| high abrasive brick | ≥50 | ≥30 | ≥2.50 | ≤17 | ≥90 | ≥1550 | ≥12 | ≤5 |
