Description
Alumina low-cement castable is an unshaped refractory material made primarily from alumina, with a special formula designed to significantly reduce the amount of cement used. It also contains appropriate additives and admixtures and is prepared by mixing and stirring. Its characteristics include high refractoriness, high softening temperature under load, high strength, strong thermal shock resistance and excellent corrosion resistance. Additionally, it has good flowability and plasticity, making it easy to apply during construction.
Specification
| Item | Grade | |||
| ADJ-85 | ADJ-90 | ADJ-95 | ||
| ω(Al2O3) / % | ≥85 | ≥90 | ≥95 | |
| ω(CaO) / % | ≤1.8 | ≤1.7 | ≤1.7 | |
| Cold Modulus of Rupture/MPa | 110℃×24h | ≥6 | ≥7 | ≥7 |
| 1100℃×3h | ≥8 | ≥8 | ≥9 | |
| 1500℃×3h | ≥10 | ≥11 | ≥11 | |
| Cold Crushing Strength/ MPa | 110℃×24h | ≥40 | ≥45 | ≥50 |
| 1100℃×3h | ≥55 | ≥60 | ≥65 | |
| 1500℃×3h | ≥80 | ≥85 | ≥90 | |
| Bulk Density/（g/cm3） | ≥2.9 | ≥3.0 | ≥3.1 | |
| Permanent Linear Change on Heating/ % | 1500℃×3h | ±0.4 | ±0.4 | ±0.4 |
Applications
Mainly used as the working layer for various high-temperature industrial kilns. Used for high-temperature, wear-resistant linings in catalytic cracking reactors and other similar applications.
