Insulating FireBrick
Lightweight kiln insulation bricks according to JM / ASTM standard are made of high purity refractory clay and alumina. Lightweight bricks are used as a thermal insulation layer and in backup lining and main layers of high temperature industrial furnaces within good physical, mechanical and thermal performance
Attributes
Low thermal conductivity and heat storage
Low impurities
High strength and durability
Thermal Shock Reliability
Accurate Dimensions
These bricks (light insulating bricks) contain compounds of organic materials that are carefully graded and burned and removed during the production process, thus creating a uniform and controlled porosity inside the brick. Each brick grade is formulated to be able to withstand the temperature conditions defined for that grade
Temperature classification of kiln insulation bricks
Grade 30 | Grade 28 | Grade 26 | Grade 23 | Properties |
|---|---|---|---|---|
| Chemical Composition % | ||||
| 73 | 67 | 56 | 42 | Al2O3 |
| 24 | 30 | 41 | 55 | SiO2 |
| ≤0.7 | ≤0.7 | ≤0.8 | ≤1 | Fe2O3 |
| 1.7 | 1.7 | 1.7 | 1.1 | K2O+Na2O |
| Phisical Properties | ||||
| 1000 | 900 | 800 | 600 | Density (Kg/m3) |
| 1550 | 1500 | 1400 | 1300 | (c◦) Thermal Resistance |
| 3.1 | 2.3 | 1.7 | 1 | (Mpa) Modulus of Rupture |
| 0.53 | 0.52 | 0.52 | 0.5 | Linear Change at 1000◦c |
| Thermal Conductivity (W/m.k) | ||||
| 0.38 | 0.33 | 0.25 | 0.18 | ℃350 |
| 0.4 | 0.35 | 0.29 | 0.2 | ℃400 |
| 0.42 | 0.37 | 0.32 | 0.24 | ℃600 |