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High-alumina light-weight insulating brick
product Overview：
High-alumina light-weight insulating brick is made by mixing hollow microsphere, microsphere, high-alumina sintered bauxite, alumina powder and bonding agent as per certain ratio, pressing molding, and burning under high-temperature. It’s mainly used for heat insulation of industrial kilns to realize energy saving.
Physical and chemical indicators：
| Item | Indexes | |||
| LG140-1.0 | LG140-0.8L | LG135-0.7L | LG135-0.6L | |
| Al2O3 % ≥ | 48 | 48 | 48 | 48 |
| Fe2O3 % ≤ | 2.0 | 2.0 | 2.0 | 2.0 |
| Volume density g/cm³ ≤ | 1.0 | 0.8 | 0.7 | 0.6 |
| Ambient compression strength Mpa ≥ | 3.5 | 2.5 | 2.2 | 1.6 |
| Changes in heating permanent line % ≤ |
1400℃×12h -2.0～1.0 |
1400℃×12h -2.0～1.0 |
1350℃×12h -2.0～1.0 |
1350℃×12h -2.0～1.0 |
| Thermal conductivity [W/(m·K)] average temperature (350±25) °C ≤ | 0.50 | 0.35 | 0.30 | 0.25 |
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