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Brief introduction of high alumina refractory castable
High alumina refractory castable is one of the unshaped refractories. It is composed of refractory aggregate, refractory powder, binder and other additives. It has no fixed shape, high fluidity, and can be poured and shaped by vibration. It can be used directly or after adding appropriate water or other liquids. It is one of the new refractory materials and does not need to be calcined.
Features of high alumina refractory castable
- High fire resistance, high fire resistance under load.
- High density and low porosity.
- Good slag resistance and corrosion resistance.
- High strength and wear resistance.
- Good peeling resistance.
- Good thermal shock stability.
- Erosion resistance.
- Good thermal strength.
Parameters of high alumina refractory castable
| Item | A-45 | A-60 | A-70 | A-75 | A-80 | A-90 | |
| Dry Density, g/cm3 | ≥ | 2.3 | 2.5 | 2.6 | 2.65 | 2.7 | 3 |
| Chemical, % | Al2O3 ≥ | 45 | 60 | 70 | 75 | 80 | 90 |
| Modulus of Rupture Mpa | 110℃×24h ≥ | 5 | 8 | 9 | 9 | 10 | 12 |
| 1500℃×3h≥ | 8(1350℃) | 10 (1450℃×3h) | – | – | 12 | 15 | |
| Compressive Strength Mpa | 110℃×24h ≥ | 30 | 40 | 40 | 45 | 45 | 60 |
| 1450℃×3h ≥ | 60 | 80 | 80 | 85 | 90 | 85 | |
| Linear Dimensional Change After Fired | (1500℃×3h)% ≤ | ±0.5 1350℃×3h | ±0.5 1450℃×3h | ±0.5 1450℃×3h | ±0.5 1450℃×3h | ±0.5 | ±0.5 |
| Refractoriness, ℃ | ≥ | 1710 | 1740 | 1790 | 1790 | 1790 | 1790 |
| Working Temp, ℃ | 1450 | 1450 | 1500 | 1550 | 1600 | 1650 |