Mullite Sand / Powder
Mullite sand / powder, produced through high temperature calcined process, is a kind of high quality casting sand made from the of high quality Kaolin mines. The main crystalline phase is mullite . It has good performance on lower thermal expansion rate, uniform expansion , better anti vibration, good hardness etc. It is very good to be used for precision casting.
Characteristic:
1. High refractor, Lower thermal expansion rate;
2. Good thermal and chemical stability;
3. Good grain shape, uniform particle size distribution ;
Chemicals Composition & Physical Property
Mullite Sand
| Grade | Al2O3 | Fe2O3 | Na2O+K2O | Dust Concentration | Bulk Density g/cm3 | Refractoriness ℃ | Moisture |
| Premium Grade | 44-50 | ＜1.5 | ＜0.5 | 300ppm max | ＞2.5 | ＞1770 | ＜0.3 |
| Common Grade | 42-52 | ＜2.0 | ＜1 | 500ppm max | ＞2.5 | ＞1770 | ＜0.3 |
Mullite Powder
| Grade | Al2O3 | Fe2O3 | Na2O+K2O | Dynamic Viscosity | Bulk Density g/cm3 | Refractoriness℃ | Moisture |
| Premium Grade | 44-50 | ＜1.5 | ＜0.5 | 12s min | ＞2.5 | ＞1770 | ＜0.3 |
| Common Grade | 42-52 | ＜2.0 | ＜1 | 15smin | ＞2.5 | ＞1770 | ＜0.3 |
Size: 0.1-0.3mm 0.1-0.4mm 0.18-0.3mm 0.18-0.5mm 0.3-0.7mm 0.3-0.8mm 0.425-0.85mm 0.5-1.0mm 0.7-1.0mm 0.7-1.5mm 2-5mm 16-30Mesh 30-60Mesh -120Mesh -200Mesh -325Mesh or as per customer requirements.
