Fireclay refractory bricks are a type of high-temperature resistant material primarily made from hard clay clinker and are typically composed of aluminosilicate minerals. These bricks contain alumina (Al₂O₃) and silica (SiO₂), with alumina content generally ranging from 25% to 48%. Fireclay bricks exhibit excellent thermal resistance and can withstand temperatures exceeding 1,400°C, making them suitable for various high-temperature industrial applications.
Produced through high-temperature sintering, fireclay bricks possess high compressive strength and mechanical stability. With low porosity and high density, they are highly effective in resisting alkali and chemical corrosion, which extends the lifespan of equipment in industries such as glass, metallurgy, and chemicals. Additionally, fireclay bricks have strong adaptability to thermal cycling, making them ideal for lining and protecting industrial furnaces and kilns.
1. Can it Handle Rapid Temperature Changes?
Issue: Glass furnaces experience extreme thermal cycling, risking cracks and spalling.
Our Solution: Our fireclay bricks have excellent thermal shock resistance, designed to withstand temperatures exceeding 1,400°C.
2. Does it Resist Alkali and Chemical Corrosion?
Issue: Corrosive alkali vapors released during glass production can weaken furnace linings.
Our Solution: Our bricks provide superior alkali and chemical resistance, preserving structural integrity over time.
3. Will it Prevent Glass and Gas Infiltration?
Issue: High porosity can lead to penetration by molten glass and gases, reducing brick longevity.
Our Solution: With low porosity and permeability, our bricks minimize infiltration, extending the service life of your furnace.
4. Does it Maintain Load-Bearing Capacity at High Temperatures?
Issue: Bricks must withstand heavy loads at elevated temperatures, especially in the tank and bottom layers.
Our Solution: Our fireclay bricks offer high refractoriness under load (RUL), ensuring they stay strong under intense conditions.
5. Will it Stand Up to Long-Term High Temperatures Without Deforming?
Issue: Sustained high temperatures can cause creep and deformation, compromising furnace stability.
Our Solution: Built with a low creep rate, our bricks maintain shape and structure even under prolonged stress.
6. Is it Mechanically Strong for Areas Exposed to Molten Glass?
Issue: High-wear areas require bricks that resist physical abrasion and wear.
Our Solution: With high bulk density and mechanical strength, our bricks are ideal for direct contact with molten glass, providing outstanding durability.
| Low Porosity Fireclay Bricks | |||||||
| Grade | Unit | FDN-12 | FDN-15 | FDN-18 | |||
| Typical | Guarantee | Typical | Guarantee | Typical | Guarantee | ||
| Al2O3 | % | 47 | ≥45 | 45 | ≥44 | 43 | ≥41 |
| Fe2O3 | % | 0.8 | ≤1.1 | 1.3 | ≤1.6 | 1.7 | ≤2.0 |
| Refractoriness | °C | ≥1770 | ≥1770 | ≥1750 | |||
| Bulk Density | g/cm3 | 2.4 | ≥2.37 | 2.34 | ≥2.3 | 2.3 | ≥2.25 |
| Apparent Porosity | % | 11 | ≤12 | 14 | ≤15 | 16 | ≤18 |
| Cold Crushing Strength | MPa | 75 | ≥60 | 65 | ≥50 | 60 | ≥50 |
| 0.2MPa Refractoriness Under Load, T0.5 | ℃ | 1520 | ≥1500 | 1470 | ≥1450 | 1440 | ≥1420 |
| Permanent Linear Change, 1400°C*2h | % | +0.1～-0.1 | +0.1～-0.2 | +0.1～-0.3 | |||
| Superduty & Normal Duty Fireclay Bricks | ||||||||
| Grade | Unit | SK32 | SK33 | SK34 | SK35 | PN-42 | PN-40 | PN-35 |
| Refractoriness | SK | 32 | 33 | 34 | 35 | |||
| Refractoriness | °C | 1750 | 1730 | 1710 | ||||
| Bulk Density | g/cm3 | ≥2.0 | ≥2.15 | ≥2.2 | ≥2.25 | 2.2 | 2.15 | 2.1 |
| Apparent Porosity | % | ≤24 | ≤24 | ≤24 | ≤23 | ≤20 | ≤24 | ≤26 |
| Cold Crushing Strength | MPa | ≥25 | ≥30 | ≥45 | ≥35 | ≥30 | ||
| 0.2MPa Refractoriness Under Load, T0.5 | ℃ | ≥1250 | ≥1300 | ≥1350 | ≥1380 | ≥1400 | ≥1350 | ≥1320 |
| Permanent Linear Change | % | +0.1～-0.4 (1400°C*2h) | +0.1～-0.4 (1350°C*2h) | +0.1～-0.4 (1300°C*2h) | ||||
| Al2O3 | % | ≥35 | ≥38 | ≥38 | ≥45 | ≥42 | ≥40 | ≥35 |
| Fe2O3 | % | ≤3.0 | ≤2.8 | ≤2.5 | ≤2.5 | ≤2.0 | ≤2.5 | ≤3.0 |
