Description
Lightweight thermal insulation castable refractory is made of silica & alumina lightweight aggregates and powders. This castable has the characteristics of low density, low thermal conductivity, high refractoriness, sound absorption and heat absorption, mainly used in kilns and related equipment that require insulation and heat preservation.
Specification
| Items | Grades | ||||
| QJ-1.5 | QJ-1.3 | QJ-1.0 | QJ-0.8 | QJ-0.6 | |
| Al2O3/% | 42 | 40 | 35 | 30 | 25 |
| Density/(g/cm³) | ≤1.5 | ≤1.3 | ≤1.0 | ≤0.8 | ≤0.6 |
| CCS/MPa | ≥12 | ≥7 | ≥5 | ≥4 | ≥2.5 |
| 10 | 5.5 | 4.0 | 3.0 | 2.0 | |
| HPLC / % | 1300 ℃×3 h | 1200 ℃×3h | 1000 ℃×3h | 800 ℃×3h | 600 ℃×3 h |
| ±1.0 | |||||
| λ / [W/(m·K)] (350±25)℃ | ≤0.6 | ≤0.55 | ≤0.50 | ≤0.40 | ≤0.35 |
Application
Lightweight thermal insulation castable is mainly used for various industrial kilns, such as blast furnaces, hot blast furnaces, carbon roasting furnaces, carbon calcining furnaces, coke ovens, boilers, lime kilns, cement kilns and glass kilns, etc. They can also be used for exterior walls, interior walls and roofs of buildings.
