Alumina Bubble Brick Description
Alumina bubble fire brick is a new type high temperature heating insulation materials and made of industrial alumina in the electrical furnace through smelting and blowing. alumina bubble refractory brick crystal form is a-Al2O3 microcrystal and main body is alumina bubble which can be made to be all kinds of products with various shapes for serving the highest temperature of 1800℃ with high mechanical strength and low bulk density.
Properties of Alumina Bubble Brick
- Light weight,
- Saving energy,
- Lower construction cost,
- High temperature resistance,
- Low reheating linear change,
- Good thermal shock resistance.
Manufacturing Process of Alumina Bubble Brick
Aluminium bubblle firebrick adopt alumina bubble ball as the main raw materials, high performance ultrafine powder as the annexing agent and organic substance as the binding agent through molding and drying, and then are fired in the high temperature shuttle kiln.
Advantage of Alumina Bubble Brick
Aluminium bubblle fire brick has the features of heat insulation and low thermal conductivity, which can result the great heat insulating effect, reduce heat waste and improve thermal efficiency. using aluminium bubblle refractory brick can save energy high up to 30%. and alumina bubble block’ service temperature is high up to 1750 ℃. the thermal stability is good and the reheating linear change rate is low, aluminium bubble block can results the long service life.
Rongsheng Refractory Alumina Bubble Brick Specifications
| Item | Alumina Bubble Brick | |||
| Types | Unit | 85# | 90# | 99# |
| Maximum Service Temperature | ℃ | 1680 | 1700 | 1800 |
| Al2O3 | % | ≥85 | ≥90 | ≥99 |
| SiO2 | % | ≤15 | ≤8 | ≤0.2 |
| Fe2O3 | % | ≤0.2 | ≤0.2 | ≤0.2 |
| Bulk Density | g/cm3 | 1.4-1.7 | 1.4-1.7 | 1.4-1.7 |
| Cold Crushing Strength | MPa | ≥12 | ≥10 | ≥9 |
| Refractoriness Under Load (0.1MPa, 0.6%) | ℃ | ≥1650 | ≥1760 | ≥1760 |
| Reheating Linear Change (1600℃*3h) | % | ±0.3 | ±0.3 | ±0.3 |
| Thermal Expansion Coefficient(Room temperature -1300℃) | ×10-6℃-1 | ~7.8 | ~8.0 | ~8.6 |
| Thermal Conductivity(Average temperature 800℃ ) | W/(m·K) | ≤0.8 | ≤1.3 | ≤1.5 |
Application of Alumina Bubble Brick
Alumina bubble brick is a kind of very important refractory material for resisting high temperature and special demands of positions for furnace and kiln, which is mostly used as insulating brick for insulation layer of furnace and kiln, and also aluminium bubble brick can be used for service linings in manufacturing high purity quartz for the electronics industry such as ceramic tile linings in gas turbines and backup linings in reactors.
Alumina Bubble Brick Manufacturer from RS Refractory Factory
RS refractory factory as a professional alumina bubble brick manufacturer in china, have many competitive advantages in the market. if you have demand of aluminium bubble bricks, or have some questions on aluminium bubble firebrick about physical and chemical indicators, please contact us for free, we will provide you with high quality aluminium bubble refractory brick.