ºC≤Direct-Bonded Magnesia Chrome Brick:Direct Bonded Magnesia Chrome Brick is made from high grade magnesia sand and chrome oxide,it has the advantage of small thermal expansion and high temperature resistance,etc.
Application:widely used for many industrial furnaces and kilns such as cement kilns,open-hearth furnace and melting furnace for nan-ferrous metals,glass furnace and so on.
Technical Data:| MgO,% ≥ | 60 | 70 | 70 | 75 | 80 |
| Cr2O3,% ≥ | 12 | 9 | 9 | 6 | 4 |
| SiO2,% ≤ | 3.2 | 3 | 2.8 | 2.8 | 2.5 |
| Apparent Porosity,% ≤ | 19 | 19 | 19 | 18 | 18 |
| Bulk Density,g/cm3 ≥ | 3 | 2.98 | 2.98 | 2.95 | 2.93 |
| Cold Compressive Strength,Mpa ≥ | 35 | 40 | 40 | 40 | 40 |
| Refractoriness Under Load,ºC ≥ | 1580 | 1580 | 1600 | 1600 | 1600 |
| Thermal Expansion,% (1000ºC) | 1.01 | 1.01 | 1.03 | 1.05 | 1.05 |
| Thermal Shock Resistance,cycles(1100ºC,water cooling) ≥ | 5 | 5 | 5 | 5 | 5 |
