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High-alumina light-weight insulating brick
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High-alumina light-weight insulating brick
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Product Description
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 |