Description
► Description
Fire clay insulation brick is made of local top grade fireclay materials under the high temperature according to the lasted national standard, which possesses even bulk density, high strength, low thermal conductivity and low impurity.
► Application
Fire clay insulation brick mainly used for the insulating lining of hot surfaces or backing heat-insulating layers of other refractory materials. The refractory linings or heat-insulating materials of the industries, such as, ethylene pyrolysis furnaces, tubular furnaces, reforming furnaces of synthetic ammonia, gas generators and high-temperature shuttle kilns, etc.
Typical Indexes
| Brand | NG-0.5 | NG-0. 6 | NG-0. 8 | NG-1.0 | NG-1.3 |
| ASTM Brand | ISO125-0.5 | ISO125-0.6 | ISO135-0.8 | ISO135-1.0 | ISO140-1.2 |
| Max Service Temperature (℃) | 1150 | 1200 | 1280 | 1300 | 1350 |
| Bulk Density (g/cm3) | 0.55 | 0.6 | 0.8 | 1.0 | 1.3 |
| Apparent Porosity % | 80 | 70 | 60 | 55 | 50 |
| Cold Crushing Strength(Mpa) ≥ | 1.5 | 2.0 | 2.5 | 3.0 | 4.0 |
| Reheating Linear Change (%)℃*12H ≤ | 1250℃ -0.5 | 1300℃ -0.5 | 1350℃ -0.5 | 1350℃ -0.9 | 1350℃ -0.9 |
| Thermal conductivity（W/m. k） | 400℃ | 0.14 | 0.25 | 0.35 | 0.41 | 0.51 |
| 600℃ | 0.16 | 0.29 | 0.45 | 0.43 | 0.61 |
| 800℃ | 0.18 | 0.31 | 0.50 | 0.44 | 0.67 |
| 1000℃ | 0.20 | 0.33 | 0.60 | 0.45 | 0.8 |
| Al2O3 (%) | 37 | 40 | 40 | 40 | 40 |
| Fe2O3 (%) | 1.0 | 1.5 | 1.5 | 1.5 | 2 |
| SiO2 | 44 | 55 | 55 | 55 | 55 |
