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Description of high alumina insulating fire brick
High alumina insulating fire brick refers to the thermal insulation refractory products made of bauxite as the main raw material with Al2O3 content of not less than 48%. High alumina insulating fire brick Al2O3 content and volume density is different, the highest use temperature is different, usually in 1250-1350℃, some can reach 1550℃.
Features of high alumina insulating fire brick
High alumina insulating fire brick has the characteristics of high temperature strength, corrosion resistance to various atmospheres, excellent thermal shock stability, good heat insulation performance, energy saving effect and so on.
More relevant refractory products: Ceramic fiber board
High alumina insulating fire brick index
| Item | LG-1.0 | LG-0.9 | LG-0.8 | LG-0.7 | LG-0.6 |
| Al2O3 | ≥48 | ≥48 | ≥48 | ≥48 | ≥48 |
| Fe2O3 | ≤2.0 | ≤2.0 | ≤2.0 | ≤2.0 | ≤2.0 |
| Bulk Density (g/cm3) | ≤1 | ≤0.9 | ≤0.8 | ≤0.7 | ≤0.6 |
| Cold Crushing strength (Mpa) | ≥3.92 | ≥3.43 | ≥2.94 | ≥2.45 | ≥1.96 |
| Thermal Conductivity Coefficient (W/mk) | ≤0.45 | ≤0.45 | ≤0.35 | ≤0.35 | ≤0.3 |
| Permanent Linear Change Rate (max 2%) (℃) | 1400 | 1400 | 1400 | 1350 | 1350 |
Application of high alumina insulating fire brick
High alumina insulating fire brick with its high porosity, low volume density, good heat insulation performance, is widely used in various industrial kiln internal fire brick and ketone body between the space of thermal insulation filling material, to reduce the heat loss of the kiln so as to obtain high energy utilization efficiency.