Ceramic Foundry Sand – Composition
| Al2O3 | 78-85% |
| SiO2 | 8-12% |
| Fe2O3 | 3.5% (max) |
| TiO2 | 3.5% (max) |
| Refractoriness | 1850C (3362F) |
| Angle Coefficient | 1.1 (max) |
| Thermal Expansion (at 100°C) | 0.15 |
| Thermal Conductivity | 0.196 W/m.K |
| Specific Heat | 873 J/kg |
| Bulk Density | 1.9-2.2 g/cm3 |
| pH Value | 7.65 |
| Shape | Solid Sphere |
| Binder Content Required | 3-4% |
| Crushability | 112 |
Ceramic Foundry Sand Characteristics and Casting Benefits:
- High AI2O3 mineral composition
- Higher refractoriness than silica-based sands (around 1850 C°)
- Much lower thermal expansion compared to chromite and zircon-based sands.
- Reduce burn-in
- Compatible with existing resin systems
- Regular spherical shape
- Provide a highly smooth surface
- Reduce binder addition
- Excellent air permeability and dispensability (reduce cleaning cost)
100% recyclable - Cost reduce (up to around 40 times against 5-10 times for chromite based sands)
Environment respect and health safety
Ryder (verified owner) –
Good service.