Lightweight thermal insulation castables are composed of refractory lightweight aggregates and powders, binders, additives, etc. It can ensure the density and fullness of the mortar joints of the masonry, and can significantly improve the air tightness, integrity and corrosion resistance of the chimney lining. It can be used for the lining of various equipment such as furnace walls, kiln roofs, pipelines, etc., to keep warm and prevent heat transfer.
| Item/Grade | QJ-0.5 | QJ-0.8 | QJ-1.0 | QJ-1.1 | QJ-1.3 | QJ-1.5 | QJ-1.8 | |
|---|---|---|---|---|---|---|---|---|
| Bulk Density (g/cm³) | 0.5 | 0.8 | 1.0 | 1.1 | 1.3 | 1.5 | 1.8 | |
| Max. Service Temperature/℃ | 1150 | 1200 | 1250 | 1250 | 1300 | 1300 | 1350 | |
| Thermal Conductivity Coefficient ≤/[W/(m·K)] | 350℃ | 0.15 | 0.25 | 0.3 | 0.4 | 0.45 | 0.6 | 0.65 |
| 700℃ | 0.20 | 0.30 | 0.4 | 0.45 | 0.5 | 0.7 | 0.75 | |
| Cold Crushing Strength ≥/MPa | 110℃*24h | 1.5 | 2.0 | 4.0 | 5.5 | 10 | 15 | 20 |
| 1000℃*3h | 1.5 | 2.0 | 5.5 | 6.5 | 15 | 20 | 30 | |
| Permanent Linear Change (1000℃*3h)/% | -1.5 | -1.0 | -1.0 | -0.5 | -0.5 | -0.5 | -0.5 | |
1.Low Thermal Conductivity 2.Lightweight，easier to handle, transport, and install, reducing structural loads. 3.Good Thermal Shock Resistance 4.Acid Resistance
1.Power industry: various power generation facilities, such as boilers, furnaces and flue gas ducts 2.Petrochemical industry: equipment such as reformers, crackers and heaters 3.Metallurgical industry: various metallurgical processes, including ladles and heating furnaces 4.Kiln insulation: insulation for high-temperature kilns (such as rotary kilns and tunnel kilns)