Chromite sand is used as a highly fireproof sharpener for moulds and cores. Originally from South Africa . The sand is produced by crushing chrome ore and its washing in spiral concentrators, subsequent drying, dust cleaning, screening and sorting as per grain size.
| Item | Unit | Index |
| Cr2O3 | % | 46.0min |
| SiO2 | % | 1.0max |
| FeO | % | 26.5max |
| CaO | % | 0.30max |
| MgO | % | 10.0max |
| Al2O3 | % | 15.5max |
| P | % | 0.003max |
| S | % | 0.003max |
| Cr/Fe | / | 1.55:1 |
| Bulk Density | g/cm3 | 2.5-3 |
| Color | / | Black |
| PH | / | 7-9 |
| The amount of the acid | / | 2ML(MAX) |
| Percent Soil | % | 0.1max |
| Percent Moisture | % | 0.1max |
| The Sintered | 1600 | |
| Percentage of Free Acid Present in the Sand | % | 0 |
| Filling Density | g/cm3 | 2.6 |
| Sintering Point | 1800min | |
| Melting Temperature | 2180 |
Available Size: AFS35-40, AFS40-45, AFS45-50, AFS50-55, AFS55-60, AFS60-65