Graphite is a naturally-occurring form of crystalline carbon. It is a native element mineral found in metamorphic and igneous rocks. Graphite is a mineral of extremes. It is extremely soft, cleaves with very light pressure, and has a very low specific gravity. In contrast, it is extremely resistant to heat and nearly inert in contact with almost any other material. These extreme properties give it a wide range of uses in metallurgy and manufacturing.
Graphite From Regional Metamorphism (Flake Graphite)
Most of the graphite seen at Earth’s surface today was formed at convergent plate boundaries where organic-rich shales and limestones were subjected to the heat and pressure of regional metamorphism. This produces marble, schist, and gneiss that contain tiny crystals and flakes of graphite.
When graphite is in high enough concentrations, these rocks can be mined, crushed to a particle size that liberates the graphite flakes, and processed by specific gravity separation or froth flotation to remove the low-density graphite. The product produced is known as “flake graphite.”
Flake Graphite (MADAGASCAR Origin)
| Fixed Carbon | +20Mesh | +32Mesh | +40Mesh | +50Mesh | +60Mesh | +80Mesh | +100Mesh | +150Mesh | Moisture |
| 85-99% | 7% Min | 40% Min | 75% Min | 92% Min | 97% Min | 99.5%Min | – | – | 0.5% Max |
| 80-96% | – | 25% Min | 28% Min | 80% Min | 90% Min | 98% Min | – | – | 0.5% Max |
| 80-96% | – | 0.1% Min | 2% Min | 30% Min | 65% Min | 97% Min | 98% | – | 0.5% Max |
| 80-96% | – | 0.2% Min | 25% Min | 13% Min | 40% Min | 84% Min | 94% | – | 0.5% Max |
| 75-95% | – | 0.1% Min | 0.5% Min | 1.5% Min | 10% Min | 50% Min | 75% | – | 0.5% Max |
| 90-98% | – | 80% Min | – | – | – | – | – | – | 0.5% Max |
| 90-98% | – | – | – | 80% Min | – | – | – | – | 0.5% Max |
| 90-97% | – | – | – | – | – | 80% Min | – | – | 0.5% Max |
| 90-97% | – | – | – | – | – | – | 80% Min | – | 0.5% Max |
| 90-96% | – | – | – | – | – | – | – | 80% Min | 0.5% Max |
| 85-96% | – | – | – | – | – | – | 20% Max | – | 0.5% Max |
Packing:
• 1 ton net big bags (palletised) or 1,125 ton;
• dual 50 kg bags (net weight) inner polyethylen bag, outer polypropylen bag (in bulk);
• dual 25 kg bags (net weight) inner polyethylen bag, outer polypropylen bag (in bulk);
• the 25 kg and 50 kg bags can be stacked in 1 ton open top big bags (palletised)
