Andalusite Alumina Castable 85% Al2O3
Andalusite Alumina Castable 85% Al2O3 is a conventional castable based on bauxite and andalusite with 84 – 86% Al2O3, suitable for service temperatures up to 1650 °C. It has a hydraulic bond and is installed by casting with vibration.
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- Castables & Ramming Mixes
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Product overview & application
About Andalusite Alumina Castable 85% Al2O3
Andalusite Alumina Castable 85% Al2O3 is a conventional castable based on bauxite and andalusite with 84 – 86% Al2O3, suitable for service temperatures up to 1650 °C. It has a hydraulic bond and is installed by casting with vibration. Material type according to the datasheet: Dense refractory concrete; raw material basis: bauxite and andalusite.
Conventional castables contain more calcium aluminate cement. They are easy to install, but need more water and have a higher porosity after firing than low cement grades, so they are not intended for direct contact with molten metal. Andalusite converts to mullite on heating, which supports volume stability and thermal shock resistance.
Technical properties
- Maximum service temperature: 1650 °C
- Al2O3: 84 – 86%
- Bulk density: 2.8 – 2.88 g/cm³
- Grain size: 0 – 5 mm
- Cold crushing strength after drying at 110 °C: Min. 600 kg/cm²
Installation, packaging and storage
Installation: casting with vibration. Water addition, drying and initial heat-up should follow the manufacturer's instructions to achieve the best properties. Packaging: 25 kg bags (dry mix, water is added on site). Shelf life: 6 months (dry, cool, frost-free place).
The values in the specification table are taken from the product datasheet. Contact the Pas Espadana technical team to select the right grade for your operating conditions.
Applications
- Industrial furnaces, burners and stacks with medium to high service temperatures
- Refractory repairs and linings in the steel, cement and petrochemical industries
Information needed for review
- Service temperature and type of equipment
- Installation method and lining thickness
- Chemical and mechanical conditions (slag, alkalis, abrasion)
- Required quantity and delivery time
Technical specifications
| Maximum service temperature | 1650°C |
|---|---|
| Bulk density | 2.8 – 2.88g/cm³ |
| Grain size | 0 – 5mm |
| Cold crushing strength (110 °C) | Min. 600kg/cm² |
| Al2O3 | 84 – 86% |
| MgO | 0.25 – 0.3% |
| CaO | 1 – 2.5% |
| Fe2O3 | 0.75 – 1.5% |
| TiO2 | 1 – 2% |
| SiO2 | 9 – 11% |
| Installation | Casting with vibration |
Selection based on your conditions
Contact our technical team to review grades, supply and to receive a valid document.
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