Lightweight mullite castable lightweight yet high strength, energy efficient in heat preservation and stable. Used for linings of industrial kilns, thermal equipment and flues.
The ZKM series lightweight mullite castable is formulated with porous mullite as the aggregate, combined with materials such as pure calcium aluminate cement, mullite micro - powder, and alumina micro - powder. It is a refractory casting material suitable for medium - to - high - temperature environments (1000 - 1500℃).
Features and Properties
| Project Index | ZKM - 1.8 | ZKM - 1.5 | ZKM - 1.2 | |
| Aggregate | Lightweight Mullite Aggregate | Lightweight Mullite Aggregate | Lightweight Mullite Aggregate | |
| Al₂O₃ /% | ≥55 | ≥50 | ≥45 | |
| SiO₂ /% | ≤40 | ≤45 | ≤50 | |
| Maximum service temperature /℃ | 1500 | 1400 | 1300 | |
| Bulk density /g/cm³ | After drying at 110℃×24h | 1.8 ± 0.1 | 1.5 ± 0.1 | 1.2 ± 0.1 |
| Cold compressive strength /MPa ≥ | 110℃×24h | 10 | 5 | 4 |
| 1400℃×3h | 25 (at 1350℃) | 20 (at 1300℃) | 8 (at 1200℃) | |
| Linear change after firing /% ≤ | 1400℃×3h | ±1.0 (at 1350℃) | ±1.0 (at 1300℃) | ±1.0 (at 1200℃) |
| Thermal conductivity /W/m·K ≤ | 500℃ | 0.45 | 0.40 | 0.30 |
| 800℃ | 0.55 | 0.50 | 0.35 | |
Al₂O₃:46%-60%;
Fe₂O₃: 0.7%-1.0%;
Operating Temp:1300-1500℃;
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