About Ordinary Grade
It is basically used in small induction furnaces & is lesser resistant to high temperature. Recommended up to 1600°C
| Ramming Mass Grades | Max temp | Max grain | Grain silica | Fe2O3 |
| Ordinary grade | 1600°C | 6-7 mm | 98% | 0.07% |
Chemical Composition
| Silica | SiO2 | 98 to 99% |
| Alumina | Al2O3 | 0.04% |
| Ferric Oxide | Fe2O3 | 0.04-0.06% |
| Manganese Oxide | MnO | Nil |
| Calcium Oxide | CaO | Nil |
| Magnesium Oxide | MgO | Nil |
| Sodium Oxide | Na2O | 0.05% |
| Potassium Oxide | K2O | Nil |
| Loss in Ignition | - | 0.08% |
| Sintering Temp. | 1200°C | |
| Max Service Temp. | 1710°C | |
| Grain Sizes | 0 to 5 mm |
