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Bubble Alumina Brick Description
Bubble Alumina Brick is a kind of energy-saving heat insulation material of ultra-high temperature material. It is made of alumina hollow ball and alumina powder as the main raw materials, combined with other binders, and fired at a high temperature of 1750 degrees.
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Bubble Alumina Brick Specification
| รายการ | Bubble alumina brick | Bubble zirconia brick | ||
| 85 | 90 | 99 | 98 | |
| Max service temperature | 1680° C | 1700° C | 1800° C | 2200° C |
| Al2O3/% | ≥85 | ≥90 | ≥99 | – |
| ZrO2/% | – | – | – | ≥98 |
| SiO2 /% | ≤13 | ≤8 | ≤0.2 | ≤0.2 |
| Fe2O3/% | ≤0.2 | ≤0.2 | ≤0.2 | ≤0.2 |
| Bulk density/g.cm3 | 1.4-1.7 | 1.4-1.7 | 1.4-1.7 | ≤3.0 |
| Cold crushing strength/Mpa | ≥12 | ≥10 | ≥9 | ≥8 |
| Refractoriness under load (0.1MPa,0.6%) | ≥1650°C | ≥1700°C | ≥1700°C | ≥1700°C |
| Reheating Linear Change % (1600 ° C,3h) ≤ | ±0.3 | ±0.3 | ±0.3 | ±0.3 |
| Thermal expansion coefficient (Room temp-1300°C) | ~7.8 | ~8.0 | ~8.6 | ~9.0 |
| Thermal conductivity w/(m.k)(Average 800°C) | ≤0.8 | ≤1.3 | ≤1.5 | ≤0.3 |
Production process of bubble alumina bricks
การเตรียมวัตถุดิบ (alumina powder and additives) → mixing → foaming (physical foaming and chemical foaming) → molding → drying → sintering → cooling → cutting and processing → quality inspection
On-site inspection of bubble alumina bricks
What does excess of alumina cause in bricks?
- Alumina itself is non-toxic. If excessive aluminum is ingested in daily life, it will easily cause mental retardation, slow reaction, ฯลฯ, and will also affect the growth and development of human bones.
- Frequent inhalation of the dust of this substance will not only affect the functions of various organs, but also cause a decrease in resistance and immunity.
- Alumina generally produces a large amount of dust during production, which will affect the environment, production equipment, and personal safety.
- Excessive alumina may cause tiles to be loosely bonded and hollow and fall off.
What is the main function of alumina in brick?
- Improve hardness and wear resistance
- Improve high temperature stability and corrosion resistance
- Anti-pollution performance
- Beautiful and diverse decorative effects
What are alumina bricks used for?
High temperature insulation: Bubble alumina bricks are mainly used for insulation in high temperature environments, such as high temperature kilns, metallurgical kilns, เตาเผาแก้ว, ฯลฯ.
Energy-saving effect: Due to its excellent thermal insulation performance, bubble alumina bricks can significantly reduce energy consumption and achieve energy-saving effects.
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