Clay insulation bricks and it is also called clay lightweight bricks. It is heat insulation refractory products made of refractory clay as the main raw material with an Al2O3 content of 30%-48%, the clay clinker is between 65%-85%. Clay insulation bricks are mainly used for the insulation layer of various kilns that do not directly contact the flame, and the operating environment temperature is 800℃-1200℃. Clay insulation brick is generally not in direct contact with the flame, and it is used in the heat insulation layer of the kiln. The main role of clay insulation bricks is to provide effective insulation and reduce heat transfer between the kiln and the outside air.
| Item/Grade | NG140-1.5 | NG135-1.3 | NG135-1.2 | NG130-1.0 | NG125-0.8 | NG120-0.6 | NG115-0.5 | ||
|---|---|---|---|---|---|---|---|---|---|
| Bulk Density (g/cm³) | μ0 | ≤ | 1.5 | 1.3 | 1.2 | 1.0 | 0.8 | 0.6 | 0.5 |
| σ | / | 0.06 | |||||||
| Cold Crushing Strength/MPa | μ0 | ≥ | 6 | 5 | 4.5 | 3.5 | 2.5 | 1.3 | 1.0 |
| σ | / | 1.0 | 0.5 | ||||||
| Xmin | / | 5.5 | 4.5 | 4.0 | 3.0 | 2.0 | 1.0 | 0.8 | |
| Permanent Linear Change/% | Experimental Conditions | 1400℃*12h | 1350℃*12h | 1300℃*12h | 1250℃*12h | 1200℃*12h | 1150℃*12h | ||
| Xmin~Xmax | -2-1 | ||||||||
| Thermal Conductivity Coefficient/[W/(m·K)] ≤ Average Temperature (350±25)℃ | Xmin | ≤ | 0.65 | 0.55 | 0.50 | 0.40 | 0.35 | 0.25 | 0.23 |
1.Low thermal conductivity: 0.23-0.65W/(m·K), better thermal insulation performance.
2.Low heat capacity: 0.8-1.2kJ/(kg·K), quickly adapt to temperature changes.
3.Environmental protection: natural clay as raw material, no harmful substances.
4.Stable performance: performance will not deteriorate due to long-term high temperature use.
1.Metallurgical industry: used as thermal insulation layer for high-temperature kilns, furnaces, heating furnaces and other equipment.
2.Petrochemical industry: used as thermal insulation layer for reactors, distillation towers and other equipment.
3.Power industry: used for boilers and chimneys in power plants to improve energy efficiency.
4.Glass industry: used for lining and insulation layer of glass melting furnaces to improve energy efficiency and production efficiency.