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OLIVINE SAND |
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| General Description |
| Crushed/ Screened Volcanic Rock Sand. Olivine, a finer sand may be used due to increased permeability, and thermal expansion is much lower than silica. |
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| Appearance |
| Grey/Green Granular Material |
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| Typical Chemical Analysis |
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MgO 49% Max. |
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SiO2 41% Max. |
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Fe2O3 12 % Max. |
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Al2O3 0.5 – 2.0% Max. |
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Cr2O3 0.25% Max. |
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CaO 0.2% Max. |
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L.O.I. 1.5 |
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| Size |
| 0-1 mm, 1-4 mm |
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| Application |
| Blast cleaning, foundry sand, refractories, welding electrodes, iron ore processing, abrasives, aggregates, roofing tiles, lasers, tundishes, ladle linings, electric arc furnaces, open hearth stoves, soaking pit bottoms, hot tops, forsterite bricks. |
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| Vital Features |
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Melting Point (oC) – 1,800 |
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Specific Gravity (g/cm3) 3.2-3.4 |
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Bulk Density, Loose (g/cm3) 1.45 – 1.75 |
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Fusion Point (0C) 2800-3200 |
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Thermal Expansion (in./in.) 0.0083 |
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Loss On Ignition < 1.5% |
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Thermal Conductivity @ 1000oC (cal/s-cm –oC) 0.0025 |
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Mohs Hardness @ 20oC 7.0 (Scale 7-8000) |
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PH Slightly Basic |
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Free Silica Content (%) < 0.1 |
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| As a foundry aggregate, olivine is noted for its high fusion point, low uniform thermal expansion and its remarkable ability to resist fracture from thermal shock. Olivine has been famous for years in producing excellent non-ferrous castings. Today more foundry men are realizing that olivine works equally well in iron, manganese and stainless steel. |
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| Grade |
| Foundry Grade |
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