Magnesite Bricks
The Magnesite brick is one of the most widely used basic refractory bricks. Different grade magnesites used as raw materials produce Magnesia bricks of various qualities. synthetic magnesite and dead burnt magnesite, low in iron, boron and silica are used as raw materials for magnesite brick production. Their categorization is based on the CaO/SiO2 ratio. The refractoriness of Magnesite bricks is about 1750°C. This is dependent on the Melting point of the bond. The RUL ranges from 1450°C to 1720°C. Spalling Resistance is poor for some grades and good for others. One reason for the poor Spalling resistance is a high coefficient of thermal expansion. Magnesite has the highest thermal expansion coefficient among all Refractories. Spalling resistance is also dependent on the porosity. Their excellent resistance against numerous basic slags and alkali oxides is typical for these products. Magnesite bricks are used in the regenerator chambers of glass smelters, ladle back-up lining of steel and in the non-ferrous metal industry.
Advantages
- High Refractoriness
- Anti-erosion Properties
- Slag Protection Cover
- Durability under abrasive operating environment
- Spalling Resistance
Magnesite Bricks
| Brand | MgO % (Min) | SiO2 % (Max) | CaO % (Max) | AP % (Max) | BD gm/cc (Min) | CCS kg/cm² (Min) | RUL Ta °C (Min) | PLC % (Max) | Service Temp °C (Max) | Application Area |
|---|---|---|---|---|---|---|---|---|---|---|
| GITA - MGT - 70 | 70 | 15-18 | 2.5 | 23 | 2.7 | 300 | 1500 | ±0.5 @ 1500 °C | 1600 | Ladle Backup |
| GITA - MGT - 85R | 80(±2) | 6 | 2.5 | 22 | 2.8 | 400 | 1530 | ±0.5 @ 1500 °C | 1550 | Rolling Mill Bottom |
| GITA - MGT - 85 | 85 | 5.5 | 2.5 | 20 | 2.85 | 350 | 1550 | ±0.5 @ 1550 °C | 1600 | Furnace & LD Convertors, Back Lining |
| GITA - MGT - 90 (D) | 90 | 4 | 2 | 17 | 2.90 | 500 | 1640 | ±0.5 @ 1550 °C | 1650 | Safety Lining EAF & BOF |