Introduction
Blast furnace clay bricks are premium refractory products manufactured from high-purity refractory clays with strict iron oxide control. Through high-pressure forming and sintering at 1380–1400℃, the bricks develop a dense mullite-based microstructure. They exhibit low apparent porosity and minimal permanent linear change under load, preventing carbon deposition in pores that could cause expansion and loosening. These properties make them ideal for blast furnace linings where mechanical wear resistance and structural integrity are critical.
Key Advantages
01
High Cold Crushing Strength
Withstands continuous abrasion from furnace burden with strength ≥49.0 MPa (GN-42) and ≥58.8 MPa (ZGN-42), ensuring extended service life.
02
Low Apparent Porosity
Porosity ≤16% (GN-42) and ≤15% (ZGN-42) minimizes carbon deposition in pores, preventing volume expansion and structural loosening during service.
03
Excellent Volume Stability
Permanent linear change of 0 to –0.3% (1450℃×3h) maintains lining integrity and prevents cracking under long-term high-temperature operation.
Specification
| Item | JH-GN-42 | JH-ZGN-42 |
| Al₂O₃(%)；≥ | 42 | 42 |
| Fe₂O₃(%)；≤ | 1.8 | 1.6 |
| 0.2MPa Load Softening Start Temp: ≥ | 1430 | 1450 |
| Permanent Linear Change (%) | 1450℃×2h ±0.2 | 1450℃×2h ±0.2 |
| Apparent Porosity (%): ≤ | 16 | 15 |
| Cold Crushing Strength (MPa): ≥ | 58.8 | 60.0 |
Packaging: Wooden pallet Precautions: Waterproof and shockproof
