Refractory Thermal High Alumina Insulating Brick High Porosity
Refractory lightweight high alumina thermal insulating fire brick
High alumina lightweight insulating refractory brick is made by clay clinker or light clinker and plastic clay as the main raw material, usually fuel production, but also can send or chemical foaming method porous structure. Common light chamotte bulk density of 0.75 ~ 1.2g / cm3. It refers to containing AL2O3 30% ~ 46% of lightweight refractory products, mainly for industrial kilns does not melt and no erosion of the contact action of gas insulation layer material, the using temperature is 1200 ~ 1400 ° C.
Technical Technical Standard of High Alumina Insulating brick
| High Alumina Insulating Brick | |||
| Item | A13 | D14 | D16 |
| AL2O3(%) | ≥36 | ||
| Fe2O3(%) | ≤1.0 | ||
| Bulk Density (g/cm3) | ≤0.8 | ≤0.7 | ≤1.05 |
| Cold Crushing Strength (MPa) | ≥2.5 | ≥2.0 | ≥2.5 |
| Permanent Linear Change(%) | ±1(1500℃×2h) | ±2(1400℃×2h) | ±1(1600℃×2h) |
| Thermal conductivity(350±25)℃ (W/mK) | ≤0.3 | ≤0.24 | ≤0.38 |
Features of lightweight insulating refractory brick:
1. Low levels of iron and other impurities;
2. High mechanical intensity;
3. High refractoriness, can contact with the flame directly, suitable for various atmosphere
4. High porosity, low volume density, low thermal conductivity;
5. Good heat insulating performance and energy-efficient;
6. Excellent thermal shock resistance;
7. Strong resistance to the corrosive gas and slag;
8. Long service life
High aluminium insulating brick lining with standard packing:
1. Wooden pallet with plastic film
2. According to customer's requirement
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