Insulating fire bricks
This type have low thermal conductivity and low heat storage properties. They may be used as the hot face layer or as backing insulation for dense bricks. Insulation fire bricks occur in range from Grade 23 to Grade 32.
Key Features
- Low iron content
- Resistance to thermal shock
- Low density
- Low heat storage
- High insulating properties
- Energy saving
Examples of Applications:
- Primary hot face linings
- Back-up insulation for furnaces and kilns
- Flue insulation
- Sulphur recovery equipment
- Hot blast stoves
| Grade | 23 | 26 | 28 | 30 | 32 |
| Al2O3 | 38% | 57% | 62% | 72% | 78% |
| Fe2O3 | 0.9% | 0.7% | 0.6% | 0.5% | 0.2% |
| Max Service Temperature | 1260°C /2300°F | 1430°C /2600°F | 1540°C /2800°F | 1650°C /3000°F | 1760°C /3200°F |