Product Introduction
Magnesia Chrome Brick is a kind of basic refractory material with more than 90% magnesium oxide content and periclase as the main crystal phaseis. For the Magnesia Chrome Brick, the maximum allowed environment temperature is 1700℃. It has features of high strength, high refractoriness under load, high alkali erosion resistance and high thermal shock resistance under the load conditions of 1500~1650℃ and also have big advantages of environmental protection and long service life.
It is mainly divided into common magnesia chrome brick、direct-bonded magnesia chrome brick、re-bonded magnesia chrome brick、semi-re-bonded magnesia chrome brick.
Technical Data
| Item | Commom Magnesia Chrome Brick | Direct-Bonded Magnesia Chrome Brick | ||||||
| Model | MGe6 | MGe8 | MGe12 | MGe16 | DMGe4 | DMGe8 | DMGe12 | DMGe16 |
| MgO % | 80 | 72 | 70 | 65 | 85 | 77 | 74 | 69 |
| Cr2O3 % | 7 | 10 | 13 | 17 | 5.5 | 9.1 | 14 | 18 |
| CaO % | 1.2 | 1.2 | 1.2 | 1.2 | 1.1 | 1.4 | 1.2 | 1.2 |
| SiO2 % | 3.4 | 4 | 4 | 4.2 | 1.3 | 1.2 | 1.2 | 1.5 |
| Al2O3 % | 4.5 | 6.5 | 6 | 6 | 3.5 | 4 | 3.5 | 4.5 |
| Fe2O3 % | 4 | 4.8 | 5.5 | 6.5 | 3 | 6.4 | 5 | 5.7 |
| Apparent Porosity % | 17 | 18 | 18 | 18 | 18 | 18 | 18 | 18 |
| Bulk Density g/cm3 | 3 | 3 | 3.02 | 3.05 | 3.02 | 3.04 | 3.06 | 3.08 |
| Cold Crushing Strength Mpa | 55 | 55 | 55 | 50 | 50 | 50 | 55 | 55 |
| Refractoriness Under Load °C | 1600 | 1600 | 1600 | 1600 | 1700 | 1700 | 1700 | 1700 |
| Thermal expansion % 1000°C | / | / | / | / | 1 | 1 | 1 | 0.9 |
| Thermal expansion % 1600°C | / | / | / | / | 1.8 | 1.8 | 1.8 | 1.6 |
| Item | Fused Semi-rebond Magnesia Chrome Brick | Fused Rebonded Magnesia Chrome Brick | |||||
| Model | SRMGe-16 | SRMGe-18 | SRMGe-20 | SRMGe-22 | SRMGe-26 | RMGe-12 | RMGe-14 |
| MgO % | 68 | 64 | 65 | 56 | 56 | 75 | 75 |
| Cr2O3 % | 16 | 18 | 20 | 22 | 26 | 12 | 14 |
| SiO2 % | 1.5 | 1.5 | 1 | 2.5 | 2.5 | 1.5 | 1.5 |
| Apparent Porosity % | 16 | 16 | 14 | 16 | 16 | 15 | 15 |
| Bulk Density g/cm3 | 3.1 | 3.1 | 3.1 | 3.1 | 3.1 | 3.2 | 3.2 |
| Cold Crushing Strength Mpa | 40 | 40 | 40 | 40 | 40 | 50 | 50 |
| Refractoriness Under Load °C | 1700 | 1700 | 1700 | 1700 | 1700 | 1700 | 1700 |
Application
It is mainly used for steelmaking basic open-hearth furnace, electric furnace bottom and wall, permanent lining of oxygen converter, non-ferrous metal metallurgy furnace, high-temperature tunnel kiln, lining of rotary kiln, furnace bottom and wall of heating furnace, regenerative chamber of glass furnace and etc.