Lightweight castable is a type of refractory material that is designed to be lightweight and easy to install, while still providing high-temperature resistance and insulation. It is commonly used in industries such as metallurgy, petrochemical, and power generation for applications like furnace linings, kiln linings, and thermal insulation.
Lightweight castable is a type of refractory material that is composed of lightweight aggregates, such as vermiculite or perlite, and a binder. It has a low density, high insulating properties, and is easy to install. Despite its lightweight nature, it still provides high-temperature resistance, making it an ideal choice for furnace linings, kiln linings, and thermal insulation in industries such as metallurgy, petrochemical, and power generation. Lightweight castable is an excellent alternative to heavier and more traditional refractory materials such as firebrick or dense castables.
| Item | RBTLW-30 | RBTLW-35 | RBTLW-40 | RBTLW-55 | RBTLW-75 | ||
| Working limit temperature （℃） | 1100 | 1200 | 1400 | 1500 | 1600 | ||
| 110℃ Bulk Density（g/cm3） ≥ | 1.15 | 1.25 | 1.35 | 1.40 | 1.50 | ||
| Modulus of Rupture （MPa） ≥ | 110℃×24h | 2.5 | 3 | 3.3 | 3.5 | 3.0 | |
| 1100℃×3h | 2 | 2 | 2.5 | 3.5 | 3.0 | ||
| 1400℃×3h | ― | ― | 3 | 10.8 | 8.1 | ||
| Cold Crushing Strength （MPa） ≥ | 110℃×24h | 8 | 8 | 11 | 12 | 10 | |
| 1100℃×3h | 4 | 4 | 5 | 11 | 10 | ||
| 1400℃×3h | ― | ― | 15 | 22 | 14 | ||
| Permanent Linear Change（%） | 1100℃×3h | -0.65 1000℃×3h | -0.8 | -0.25 | -0.15 | -0.1 | |
| 1400℃×3h | ― | ― | -0.8 | -0.55 | -0.45 | ||
| Thermal Conductivity （W/m.k） | 350℃ | 0.18 | 0.20 | 0.30 | 0.48 | 0.52 | |
| 700℃ | 0.25 | 0.25 | 0.45 | 0.61 | 0.64 | ||
| Al2O3（%） ≥ | 33 | 35 | 45 | 55 | 65 | ||
| Fe2O3（%） ≤ | 3.5 | 3.0 | 2.5 | 2.0 | 2.0 | ||
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