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Address: Industrial Cluster Area of Xinmi City, Henan Province，China.
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Boiler Furnace Lightweight 1450 High Alumina Insulating Brick
| Item | LG140-1.2 | LG140-1.0 | LG140-0.8L | LG135-0.7L | LG135-0.6L | LG124-0.5L |
| Al2O3 % | ≥48 | ≥48 | ≥48 | ≥48 | ≥48 | ≥48 |
| Fe2O3 % | ≤2.0 | ≤2.0 | ≤2.0 | ≤2.0 | ≤2.0 | ≤2.0 |
| Bulk Density ( g/cm3) | ≤1.2 | ≤1.0 | ≤0.8 | ≤0.7 | ≤0.6 | ≤0.5 |
| Cold Crushing Strength (MPa) | ≥4.5 | ≥4.0 | ≥3.0 | ≥2.5 | ≥2.0 | ≥1.5 |
| Linear Change on Reheating(5h,≤2%) | ≥1400 | ≥1400 | ≥1400 | ≥1350 | ≥1350 | ≥1250 |
| Thermal conductivity(350±25)℃ (W/mK) | ≤0.55 | ≤0.50 | ≤0.35 | ≤0.30 | ≤0.25 | ≤0.20 |
Light weight high alumina brick is an ideal insulating refractory
refractory material, with advantages of high strength, low thermal
conductivity, good insulation property and low price. For various
industrial kilns & furnaces, it is a kind of essential
refractory for energy saving and temperature preservation.
Light weight high alumina brick is also called high alumina
insulating brick. It contains more than 48% Ai2O3 and mainly
consists of mullite and glass phase or corundum. It is usually made
of high bauxite and a small amount of clay. After the raw materials
are grounded, it is made into mud. Then it is cast and molded and
fired at 1300~1500℃. Sometimes industrial alumimum is used to
replace bauxite. Inorganic matter is added as ignition loss
substance in order to increase the porosity of the refractory.
Feature Of High alumina insulating brick :
1. It has advantages with small bulk density, high cold crushing
strength, and high refractoriness under load, small dimension
tolerance and good thermal shock resistance.
2. It has the lowest and most stable thermal conductivity in
various insulating refractory bricks.
3. It can reduce the total weight of furnace body and the thickness
of furnace wall effectively, improve heat efficiency, lower energy
consumption, improve work conditions and production efficiency, and
considerable economic benefit can be obtained.
Production Process of High alumina insulating brick:
High alumina insulating brick:Crushing→Mixing→Shaping→Drying→Firing→Inspection→Packaging and Shipment
Light weight high alumina brick has such advantages as high
porosity, good insulation effect, high mechanical intensity, low
thermal refractory fiber board conductivity and long service life.
It has high cold crushing strengh,size precision and holds the most
stable and lowest thermal conductivity of all insulating refractory
brick at present. Its maximum insulating castable service
temperature is 1350℃. Thermal efficiency and working condition can
be improved, energy consumption can be lowered, productivity and
significant economic results can be achieved.
Light weight high alumina brick is characterized by low bulk
density. The total weight of the furnace body and walls thickness
can be reduced effectively.
It has found a wide application in ceramics tunnel kiln, roller
kiln, shuttle kiln, coking furnaces of iron and steel industry and
other thermal equipment. It is mainly used in lining and insulating
layer of areas without strong erosion by high temperature melts.
When in direct contact with flame, the surface contact temperature
can not be higher than 1350℃.
