Description
Refractory fire bricks are specialised building materials designed to withstand extremely high temperatures. They are instrumental in constructing furnaces, kilns, incinerators, and fireplaces. Fire bricks are crafted from refractory ceramic materials, known for retaining strength and structural integrity even when exposed to temperatures exceeding 1,000 degrees Celsius (1,832 degrees Fahrenheit). Unlike regular bricks, refractory fire bricks have a low thermal conductivity and do not absorb much heat, providing protection for surrounding structures and improving energy efficiency. They are made from alumina and available in various shapes and sizes. Their durability and resistance to thermal shock, abrasion, and chemical attack make refractory fire bricks indispensable in industries that require high-performance thermal management solutions.
Refractory Firebricks Special Characteristics
- High-temperature resistance up to 1300 degrees Celsius
- They help minimise heat loss by providing excellent insulation, which improves energy efficiency
- They are made from refractory ceramic materials, which are very durable.
- Firebricks are resistant to wear, thermal shock, and chemical attack
- Insulation firebricks are light-designed for better insulation while providing excellent structural strength
Refractory Fire Brick Specification Table
| Parameters | SK-30 | SK-32 | SK-34 | SK-35 | SK-36 | SK-37 | SK-38 | SK-40 |
| Al2O3 , >= | 30% | 32% | 38% | 45% | 55% | 65% | 70% | 82% |
| Fe2O3 , <= | 4.2% | 4.2% | 4.2% | 4.0% | 3.2% | 2.5% | 2.5% | 2% |
| Refractoriness, SK | 30 | 32 | 34 | 35 | 36 | 37 | 38 | 40 |
| Refractoriness | 1670°C | 1710°C | 1750°C | 1770°C | 1790°C | 1820°C | 1850°C | 1920°C |
| Temp. under load, 0.2Mpa | 1250 | 1350 | 1370 | 1420 | 1450 | 1480 | 1530 | 1600 |
| Apparent Porosity, <= | 22-25% | 21-23% | 20-22% | 19-20% | 18-19% | 16-18% | 15-17% | 15-17% |
| Bulk density, g/cm³ | 1.9-2.0 | 1.95-2.1 | 2.1-2.2 | 2.15-2.22 | 2.25-2.40 | 2.3-2.5 | 2.4-2.6 | 2.5-2.7 |
| Cold crushing strength, Mpa, >= | 20 | 25 | 30 | 40 | 45 | 50 | 60 | 70 |
