Magnesia Chrome brick is a kind of alkaline refractory product with periclase as main phase magnesite-alumina spinel clinker as basic material. the product has such characteristics as good temperature vibration, good strength and volume stablity in high temperature.
Application:
Widely used for many industrial furnaces and kilns such as cement kilns,open-hearth furnace and melting furnace for nan-ferrous metals
Physical properties
1.Low thermal conductivity
2.High refractoriness
3.High flexibility
4.Strong abrasion resistance
5.High chemical attack resistance
6.Outstanding coating friendly
| Items | Index | ||||||||
| MgO,%≥ | 82 | 76 | 72 | 75 | 70 | 60 | 70 | 75 | 80 |
| Cr2O3,%≥ | 8 | 8 | 8 | 12 | 12 | 12 | 9 | 6 | 4 |
| SiO2,%≤ | 1.5 | 2.5 | 3 | 1.5 | 2.5 | 3.2 | 2.8 | 2.8 | 2.5 |
| Apparent Porosity,%≤ | 17 | 18 | 19 | 17 | 18 | 19 | 19 | 18 | 18 |
| Bulk Density,g/cm3≥ | 3 | 2.95 | 2.95 | 3.05 | 3 | 3 | 3 | 2.95 | 2.93 |
| Cold Compressive Strength,Mpa≥ | 45 | 45 | 45 | 45 | 45 | 35 | 40 | 40 | 40 |
| Refractoriness Under Load,ºC≥ | 1700 | 1700 | 1650 | 1700 | 1700 | 1580 | 1600 | 1600 | 1600 |
| Thermal Shock Resistance,cycles(950ºC,air cooling)≥ | 80 | 80 | 60 | 80 | 60 | 60 | 60 | 60 | 60 |
| Thermal Conductivity,w/m.k(1000ºC)≤ | 2.8 | - | - | 2.8 | - | 2.8 | 2.8 | 2.9 | - |
| Thermal Expansion,%(1400ºC) | 1.5 | - | - | 1.5 | - | 1.5 | 1.5 | 1.4 | - |
