Monolithic RefractoriesCastables
Alumina Bubble Castable
High-alumina insulating castable based on hollow alumina spheres, with high refractoriness under load, high strength and good insulation for service above 1600 ℃. Low cement and aluminium sulfate bonded types.
- Grades / types
- Low cement bonder, Aluminum sulfate bonder
Product overview
Alumina bubble castable has a high refractoriness under load, high strength and good heat insulation. Its service temperature reaches 1600–1700 ℃.
It is an insulation material for carbon black reactors and for the permanent layer of high-temperature special linings, and has given satisfactory energy savings in high- and ultra-high-temperature furnaces such as petrochemical gasifiers, carbon black reactors and metallurgical induction furnaces.
Key characteristics
- High refractoriness under load
- High strength
- Good heat insulation
- Service temperature 1600–1700 ℃
- Low cement and aluminium sulfate bonded types
Technical data
| Property | Unit | Low cement bonder | Aluminum sulfate bonder |
|---|---|---|---|
| Al₂O₃ | % | ≥95 | ≥95 |
| CaO | % | ≤2.5 | — |
| Bulk Density | g/cm³ | ≤1.6 | ≤1.5 |
| Cold Crushing Strength (CCS) (110℃×24h) | MPa | ≥7 | ≥5 |
| Cold Crushing Strength (CCS) (1500℃×3h) | MPa | ≥22 | ≥18 |
| Thermal Conductivity (1000℃) | W/(m·K) | ≤0.65 | ≤0.76 |
| Working Temperature | ℃ | >1600 | >1600 |
Applications
- Carbon black reactors
- Permanent layer of high-temperature special linings
- Petrochemical gasifiers
- Metallurgical induction furnaces
Available grades, shapes and sizes
Available grades
- Low cement bonder
- Aluminum sulfate bonder
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Technical Consultation
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