Introduction
Lightweight clay bricks are insulating refractory products manufactured from refractory clay with a porous structure to achieve low density and excellent thermal insulation. Grade JH-NG1.3 features Al₂O₃ ≥25%, bulk density ≤1.3 g/cm³, and cold crushing strength ≥5 MPa. The material delivers low thermal conductivity of ≤0.55 W/(m·k) at 350±25℃ and maintains good volume stability with heating shrinkage ≤2% at 1300℃×12h. Widely used as insulating back-up linings behind working linings in various industrial furnaces and kilns.
Key Advantages
01
Low Thermal Conductivity
Thermal conductivity ≤0.55 W/(m·k) at 350±25℃ effectively minimizes heat loss and reduces energy consumption in high-temperature operations.
02
Excellent Thermal Insulation
Low bulk density and porous structure provide superior insulation performance, protecting furnace shells and improving thermal efficiency.
03
Good Volume Stability
Heating shrinkage ≤2% at 1300℃×12h ensures dimensional stability under prolonged high-temperature service, preventing cracking and structural loosening.
Specification
| 项目 | JH-NG1.3 | |
|---|---|---|
| Al₂O₃ (%) | ≥25 | |
| 体积密度 (g/cm³) | ≤1.3 | |
| 常温耐压强度 (MPa) | ≥5 | |
| 1300℃×12h加热收缩率 (%) | ≤2 | |
| 导热系数 (350±25) ℃/(W/ (m.k) ) | ≤0.55 |
