Chromite
Chromite, as is indicated by its early crystallization is resistant to the altering affects of high temperatures and pressures. These characteristics explain chromites use as a heat conductive foundry molding sand, which allows localized or general chilling of castings to improve their integrity.
As the North American representative for a leading supplier of chromite ore and sands in South Africa, Opta Mineral offers superior quality chromite sand to the steel, foundry and refractory industry. With quality control measures at all stages of our supply process, we ensure this critical mineral is on target, within specifications. Our large volume raw material purchases ensure a cost effective pricing schedule as well.
Technical Data
| Chromium Oxide | Cr2O3 | 46.42 |
| Iron Oxide | Fe2O3 |
27.20 |
| Aluminum Oxide | AL2O3 | 14.80 |
| Magnesium Oxide | MgO | 9.85 |
| Silicon Dioxide | SiO2 (total) | 0.75 |
| Titanium Oxide | TiO2 | 0.67 |
| Manganese Oxide | MnO | 0.23 |
| Calcium Oxide | CaO | 0.22 |
| Phosphorus Pentoxide | P2O5 | 0.05 |
| Sodium Oxide | Na2O | 0.03 |
| Potassium Oxide | K2O | 0.02 |
| Loss On Ignition | LOI | 0.15 |
Typical Physical Properties
| Colour | Shiny black |
| Specific Gravity | ~ 4.4 |
| Bulk Density (loose) | 163 lb/ft3 |
| Bulk Density (compacted) | 181 lb/ft3 |
| Grain Shape |
Sub-angular |
| Melting Point (0F) |
3350 - 4000 |
| Melting Point (0C) |
1850 - 2200 |
| Solubility |
Negligible |
Uses
- Used to harden steel, to manufacture stainless steel, and to form alloys
- Used in plating to produce a hard, beautiful surface and to prevent corrosion.
- Used by the aircraft and other industries for anodising aluminium
- The refractory industry uses chromite for forming molds and shapes, as it has a high melting point, moderate thermal expansion, and stable crystalline structure
Packaging
- In Bulk
- In 50lb paper bags
- In 100 lb paper bags
- In 3000lb supersacs
OPTA MINERALS has production and warehouse facilities in the following locations:
Canada: Waterdown, ON; Brantford, ON; Lachine, QC; Laval, QC; St-Bruno-de-Guigues, QC.
USA: Norfolk, VA; Hardeeville, SC; Attica, NY; Baltimore, MD; New Orleans, LA; Keeseville, NY; Milan, MI; Walkerton, IN; Richfield, OH. Los Angeles, CA.
Europe: Košice, Slovak Republic; Romans, France. |
