Raw materials:
Low iron high alumina, mullite crystal structure to phase-based high-quality insulating firebrick. . Selected high purity refractory powders, according to the proportion of products required to join the organic compound filler, vacuum compression molding, high temperature sintered mullite lightweight products.
Features:
1. Low impurities.
2. Low thermal conductivity.
3. Good heat shock stability.
4. High hot compressive strength.
5. Accurate size, the bricks can be processed into special shapes.
Applications:
Industrial furnace hot face lining and back lining in metallurgy, petrochemical, building materials, ceramics, machinery and other industries.
Such as: cracking furnace, conversion furnace, heating equipment, refining equipment, recycling equipment, stove, heating furnace, soaking furnace, heat treatment furnace, resistance furnace, tunnel kiln, roller kiln, shuttle kiln, bell kilns, glass kiln and so on.
The Specification of Lightweight Mullite Bricks Products
Item | Lightweight Mullite Brick |
Index/Brand | JM-23 | JM-26 | JM-28 |
AL2O3, % ≥ | 45 | 52 | 60 |
Fe2O3, % ≤ | 0.8 | 0.6 | 0.6 |
Bulk density g/cm3 | 0.8 | 0.9 | 0.9-1.0 |
Cold crushing strength MPa | 2.1-3.0 | 3.0-4.0 | 6.0-7.0 |
Linear change after heating%(155O°C × 2h) | ±0.5 | ±0.5 | ±0.8 |
Thermal conductivity (350°C±25°C)(w/m·k) | 0.2-0.25 | 0.2-0.3 | 0.2-0.25 |
Maximum service temperature°C | 1350 | 1450 | 1550 |