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 |
The thermal conductivity of clay insulation bricks is low, generally between 0.23-0.65 W/(m·K). This means that under the same thickness, clay insulation bricks can provide better insulation performance and reduce heat transfer.
The heat capacity of clay insulation bricks is generally 0.8-1.2 kJ/(kg K), this advantage means that clay insulation bricks need very little energy when washing to absorb or release heat, so they can quickly adapt to changes in temperature.
Clay insulation bricks use natural clay as raw material, which does not contain harmful substances, does not produce harmful gases and endangers human health, and is good for the environment.
Clay insulation bricks have good durability and stability. Due to the good stability of the material itself, it will not cause performance degradation due to long-term high-temperature use.
Clay insulation bricks can be used for the heat insulation layer of high-temperature kilns, melting furnaces, heating furnaces, etc. The low thermal conductivity and high-temperature resistance of clay insulation bricks make them an ideal choice.
Clay insulation bricks can be used for the thermal insulation layer of reactors, distillation towers, and other equipment. Clay insulation bricks can effectively reduce heat conduction and provide good thermal insulation performance.
Clay lightweight bricks are mainly used in boilers, and chimneys for power plants. The Clay insulation brick is the key equipment that generates high temperatures in the process of power generation, which can improve the energy efficiency of the boiler.
Clay insulation bricks are often used in the inner lining and insulation layer of glass furnaces. Clay insulation bricks can withstand high temperatures and provide good insulation, which helps to improve the energy efficiency and production efficiency of glass furnaces.