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Alumina bubble brick
Alumina hollow sphere bricks have a fire resistance of over 1750 degrees, good thermal stability, low rate of change in re firing line, and durability
Product details
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Aluminum oxide hollow sphere bricks are mainly made of aluminum oxide hollow spheres and aluminum oxide powder, combined with other binders, and fired at a high temperature of 1750 degrees Celsius. The service temperature can reach 1800 degrees Celsius, and the mechanical strength of the product is high, several times that of general lightweight products, while the bulk density is only half of that of corundum products.
It has been widely used in high-temperature and high-temperature kilns such as gasification furnaces in the petrochemical industry, carbon black industrial reaction furnaces, and induction furnaces in the metallurgical industry, achieving very satisfactory energy-saving effects.
Alumina hollow sphere bricks have a fire resistance of over 1750 degrees, good thermal stability, low rate of change in re firing line, and durability. Strong insulation properties and low thermal conductivity. Aluminum oxide hollow sphere bricks can be used in high-temperature energy-saving reverse flame kilns, shuttle kilns, molybdenum wire furnaces, tungsten rod furnaces, induction furnaces, nitriding furnaces, etc.
Alumina bubble brickThe size of standard brick T3 is 230 * 114 * 65mm.Customized processing of irregular shapes based on available drawingsAlumina bubble brick.
Performance indicators of alumina hollow sphere bricks
| project | Alumina bubble brick | zirconia product | ||
|---|---|---|---|---|
| model | 85 bricks | 90 bricks | 99 bricks | 98 bricks |
| Maximum operating temperature ℃ | 1680 | 1700 | 1800 | 2200 |
| Al2O3% | ≥85 | ≥90 | ≥99 | - |
| ZrO2% | - | - | - | ≥ 98 (including stabilizer) |
| SiO2% | ≤13 | ≤8 | ≤0.2 | ≤0.2 |
| Fe2O3% | ≤0.2 | ≤0.2 | ≤0.2 | ≤0.2 |
| Volume density g/cm ³ | 1.4-1.7 | 1.4-1.7 | 1.4-1.7 | ≤3.0 |
| Room temperature compressive strength MPa | ≥12 | ≥10 | ≥9 | ≥8 |
| Starting temperature of load softening ℃ | ≥1650 | ≥1700 | ≥1700 | ≥1700 |
| Reburning line change rate% (1600 ℃ * 3h) | ±0.3 | ±0.3 | ±0.3 | ±0.2 |
| Thermal expansion coefficient * 10 | -7.8 | -8 | -8.6 | -9.1 |
| Thermal conductivity w/(m.k) (Average temperature 800 ℃) |
≤0.8 | ≤0.3 | ≤1.5 | ≤0.3 |
Aluminum oxide hollow sphere brick product display
Application of alumina hollow sphere brick products
Korei Refractory produces a variety of refractory products with complete specifications, and can customize and process various shaped bricks according to demand to meet the working conditions of various high-temperature kilns.
Construction case of alumina hollow sphere brick
Experienced construction team with over 10 years of construction experience
Dedicated line delivery, fast delivery, greatly reducing transportation cycle
Regular follow-up visits by the after-sales team
24-hour rapid response and 48 hour on-site arrival
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