AFS45-50 chromite sand for foundry from South Africa
Description for chromite foundry sand:
Chromite sand for foundry is a natural spinel composed mainly of oxides of chromium and iron. It is a by-product of ferrochrome production and is primarily used in foundry applications and glass making. Chromite sand used in foundry as a highly refractory abrasive for molds and cores. Originates from South Africa. The sand is produced by crushing chromium ore, washing, drying, de-dusting, sieving and separating by grain size in spiral concentrators.
Available sizes for chromite foundry sand:
AFS30-35 AFS35-40 AFS40-45 AFS45-50 AFS40-50 AFS50-55 AFS55-60 AFS60-65
Packing for chromite foundry sand: 1000Kgs chromite sand for foundry/big bag
Supply Ability: 8000MT/month
PHYSICAL AND CHEMICAL INDEX:
| Item | Index |
| Cr2O3 | ≥46.0% |
| SiO2 | ≤1.0% |
| FeO | ≤26.5% |
| CaO | ≤0.30% |
| MgO | ≤10.0% |
| Al2O3 | ≤15.5% |
| P | ≤0.003% |
| S | ≤0.003% |
| Cr/Fe | 1.55:1 |
| Bulk Density | 2.5-3g/cm³ |
| Color | Black |
| PH | 7-9 |
| The amount of the acid | ≤ 2 ML |
| Percent soil | ≤0.1 |
| Percent Moisture | ≤0.1 |
| The sintered | 1600℃ |
| Percentage of free acid present in the sand | 0 |
| filling density | 2.6g/cm³ |
| sintering point | > 1,800°C |
| melting temperature | 2,180°C |
