Aluminate Phosphate Unfired Brick Introduction
Alumina phosphate unfire brick refers to bonded refractory bricks that consist of various multilevel-size-granule aggregates. Aluminum phosphate unfire brick exhibited better thermal shock resistance, but poor high temperature strength. However, the comprehensive performance of aluminate phosphate unfire bricks are far beyond that of sodium silicate bonded aluminum unfire bricks.
Aluminate phosphate unfired bricks have high shrinkage rate under high temperature. To solve this problem, our factory discover that certain amount of sillimanite powder in aggregate can effectively overcome the shrinkage.
Aluminate Phosphate Unfired Brick Properties
Aluminate phosphate unfire brick physicochemical properties
| Item |
Index |
| PA |
PA |
| First Glass |
qualified |
Chemical
Composition |
Fe2O3,≤ |
85 |
77 |
| Al2O3,≥ |
2.1 |
3.2 |
| CaO,≤ |
0.6 |
0.6 |
| Cold Crushing Strength, MPA |
≥70 |
≥65 |
| Bulk density, g/cm3 |
2.7 |
2.65 |
| Refractoriness under load, ℃，≥ |
1350 |
1250 |
| Refractoriness, ≥ |
1780 |
|
Alumina Phosphate Unfire brick Advantages
1. Alumina phosphate unfire brick has a simple production process that require low cost. So alumina phosphate unfire bricks are economical and beneficial.
2. Alumina phosphate unfire brick shows great wear resistance against kiln fillings, and mechanical collision.
3. Alumina phosphate unfire brick has great mechanical strength in ambient temperature.
Alumina Phospohate Unfire Brick Application
1. Electric furnace top
2. Sintering zone, transition belt, of cement rotary kiln
