Alkali-Resistant Alumina Castable 40% Al2O3 P-CAST-A40AR
Alkali-Resistant Alumina Castable 40% Al2O3 P-CAST-A40AR is a conventional castable based on high alumina chamotte and high grade SiC with Min. 40% Al2O3, suitable for service temperatures up to 1250 °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 Alkali-Resistant Alumina Castable 40% Al2O3 P-CAST-A40AR
Alkali-Resistant Alumina Castable 40% Al2O3 P-CAST-A40AR is a conventional castable based on high alumina chamotte and high grade SiC with Min. 40% Al2O3, suitable for service temperatures up to 1250 °C. It has a hydraulic bond and is installed by casting with vibration. Material type according to the datasheet: Dense refractory concrete (alkali resistant); raw material basis: high alumina chamotte and high grade SiC.
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. Silicon carbide (SiC) raises thermal conductivity and abrasion resistance and reduces the adhesion of melt and slag. The material is designed to resist attack by alkali compounds.
Technical properties
- Maximum service temperature: 1250 °C
- Al2O3: Min. 40%
- Bulk density: Approx. 2.2 g/cm³
- Grain size: 0 – 5 mm
- Cold crushing strength after drying at 110 °C: Min. 500 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: 40 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
- Areas exposed to alkali vapours and compounds, such as cement preheaters and ducts
- Linings of thermal equipment fired with alkali-bearing fuels or feed
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 | 1250°C |
|---|---|
| Bulk density | Approx. 2.2g/cm³ |
| Grain size | 0 – 5mm |
| Cold crushing strength (110 °C) | Min. 500kg/cm² |
| Al2O3 | Min. 40% |
| CaO | 3 – 6% |
| SiC | Approx. 20% |
| 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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