Natural emery sand,namely garnet sand is a sharp and tough abrasive material in a reddish tone. It is produced as a result of crushing rocks. The mineral is chosen and processed into a product of the highest standard. It works best as a waterjet abrasive medium.
Chemical Composition – Natural emery sand
| Silica SiO2 | 34-40% |
| Iron(Fe2O3+FeO) | 25-31% |
| Alumina Al2O3 | 17-21% |
| Magnesium MgO | 5-6% |
| Calcium CaO | 5.0-10.0% |
| Manganese MnO | 0-1.0% |
Physical Characteristics – natural emery sand
| Specific Gravity | 3.8-4.1/cm3 |
| Mohs Hardness | 7.5+ |
| Acid Solubility (HCL) | <1.0% |
| Bulk density | 1.8-1.9 g/cm3 |
| Chloride | 10-15ppm(25ppm max) |
| Colour | Red & Brown |
| Melting point | 1300℃ |
| Grain shape | Sub angular |
| Toxic substances | none |
| Conductivity | 25 ms/m |
Mineralogical Content
| Almandine garnet | 97-98 % |
| Quartz | ≤0.2% |
| Ilmenite | ≤0.5% |
| Others | ≤0.1% |
Particle Size Distribution
| MM | MESH | PERCENTAGE RETENTION | ||||
| 1.400 | 12 | 12/24 | 20/40 | 20/60 | 30/60 | 80 |
| 0.850 | 20 | 0 | ||||
| 0.600 | 30 | 30-40 | 0-5 | 0-5 | ||
| 0.425 | 40 | 40-50 | 50-70 | 10-25 | 0 | |
| 0.300 | 50 | 0-5 | 10-20 | 25-50 | 0-10 | 0 |
| 0.250 | 60 | 0-10 | 25-45 | 45-60 | 30-40 | |
| 0.180 | 80 | 0-15 | 10-25 | 40-50 | ||
| 0.150 | 100 | 0-5 | 5-20 | 0-5 | ||
| 0.125 | 120 | 0-1 | ||||
