Ceramic foundry sand is made of high quality bauxite, through the process of electrofusion, granulation, screening and so on,which is made of very ball-like refractory particles.
Ceramic foundry Sand for Casting Chemical and Physical index
| Shape | Round |
| Color | Dark brown |
| Bulk density | 1.95-2.05g/cm3 |
| Real density | 3.4g/cm3 |
| Refractory temperature | ≥1800℃ |
| Thermal expansion | 0.13% |
| Thermal conductivity | 0.698W/M.K |
| Angularity | ≤1.1 |
Chemical composition
| Composition | Content(%) |
| Al2O3 | >70 |
| SiO2 | 15-25 |
| Fe2O3 | <3 |
| TiO2 | <3.5 |
| CaO | <0.45 |
| MgO | <0.35 |
| K2O | <0.33 |
| Na2O | <0.08 |
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