Alumina Bubble Bricks Alumina Hollow Ball Refractory Brick For High
Temperature Furnace With Stable High-Temp Performance
The alumina bubble brick also called alumina hollow ball brick. The
anti-stripping alumina bubble brick produced by our company is made
of alumina hollow balls as the main raw material, high-performance
micropowder as the additive, and organic material as the temporary
binder, which is fired at high temperature in a shuttle kiln. The
product contains a large number of closed pores, has the
characteristics of light weight, high temperature resistance, good
insulation performance, small shrinkage after re-burning, and
excellent thermal shock resistance. It also has strong resistance
to corrosive gases and slag.
The products can greatly improve the thermal efficiency of the
kiln, shorten the production cycle, reduce the weight of the kiln
body, and realize energy saving and consumption reduction. Products
can directly contact the flame, suitable for cracking furnaces, hot
blast furnaces, heating furnaces, tunnel kilns, push kilns,
crucible furnaces and various electric furnaces, electric kiln
linings, widely used in metallurgy, refractories, light industry,
chemical industry, Ceramics, glass, electronics and other
industries. The dimensions, physical and chemical indexes, and
service life of the products have reached or exceeded the level of
similar products at home and abroad.
Features of Alumina Bubble Bricks
Alumina hollow ball bricks have the characteristics of light
weight, high temperature resistance, good thermal insulation
performance, small shrinkage after re-fire, excellent thermal shock
resistance, etc., and also have strong resistance to corrosive
gases and slag. The products can greatly improve the thermal
efficiency of the kiln, shorten the production cycle, reduce the
weight of the kiln body, and realize energy saving and consumption
reduction.
Advantages of alumina hollow ball brick
Obvious effects will be achieved for reducing the weight of the
furnace body, transforming the structure, saving materials, and
saving energy.
1. High operating temperature:
It can reach above 1750 degrees, with good thermal stability. The
reheating line has a small change rate and can be used for a longer
time.
2. Optimize the structure and reduce the weight of the furnace
body:
The bulk density of heavy bricks currently used with high
temperature resistant materials is 2.6-3.0g/cm3, while alumina
hollow ball bricks are only 1.3~1.5g/cm3. For the same volume of
one cubic meter, the use of alumina hollow ball bricks can reduce
1.1- 1.7 tons weight.
3. Save materials:
To reach the same operating temperature, the price of heavy bricks
is equivalent to that of alumina hollow ball bricks, and
considerable refractory materials are required for insulation. If
alumina hollow ball bricks are used, 1.1-1.9 tons of heavy bricks
can be saved per cubic meter, and 80% of refractory insulation
materials can be saved.
4. Save energy:
Alumina hollow spheres have obvious thermal insulation properties
and low thermal conductivity, which can achieve a good thermal
insulation effect, reduce heat dissipation, improve thermal
efficiency, and save energy. The energy saving effect can reach
more than 30%.
Physical and chemical indicators of competitive price light weight
Alumina bubble brick alumina hollow ball insulation brick:
| Item | Index |
| LQZ99-1.4 | LQZ99-1.6 | LQZ99-1.8 |
| Al2O3 % | ≥99 |
| SiO2 % | ≤0.3 |
| Fe2O3 % | ≤0.2 |
| Bulk density g/cm3 | 1.3~1.5 | 1.5~1.7 | 1.7~1.9 |
| Cold Crush Strength MPa | ≥6 | ≥10 | ≥12 |
| Thermal conductivity W/(m·K) Hot surface 1000℃ | ≤0.9 | ≤1.1 | ≤1.2 |
| Permanent Linear Change Rate % 1600℃×3h | ±0.3 |
| Item | Index |
| LQZ95-1.4 | LQZ95-1.6 | LQZ95-1.8 |
| Al2O3 % | ≥95 |
| Fe2O3 % | ≤0.2 |
| Bulk density g/cm3 | 1.3~1.5 | 1.5~1.7 | 1.7~1.9 |
| Normal temperature compressive strength MPa | ≥8 | ≥12 | ≥16 |
| Thermal Conductivity W/(m·K) hot face 1000℃ | ≤0.9 | ≤1.1 | ≤1.2 |
| Permanent Linear Change Rate % 1600℃×3h | ±0.3 |
| Item | Index |
| LQZ90-1.4 | LQZ90-1.6 | LQZ90-1.8 |
| Al2O3 % | ≥90 |
| Fe2O3 % | ≤0.2 |
| Bulk density g/cm3 | 1.3~1.5 | 1.5~1.7 | 1.7~1.9 |
| Normal temperature compressive strength MPa | ≥10 | ≥14 | ≥18 |
| Thermal Conductivity W/(m·K) Hot face 1000℃ | ≤0.9 | ≤1.1 | ≤1.2 |
| Permanent Linear Change Rate % 1600℃×3h | ±0.3 |
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