防火镁材
1.镁铬砖
我们有20年镁铬砖生产及施工经验。
| No. | Items | Typical value | Test method | |
1 | Chemical composition (%) | MgO | 55-80% | GB/T 5069 |
2 | Cr2O2 | 4-20% | ||
3 | SiO2 | ≤2.5 | ||
4 | Al2O3 | ≤2.0 | ||
5 | Fe2o2 | ≤8.0 | ||
6 | CaO | ≤2.0 | ||
7 | Physical Properties | Cold Crushing Strength (Mpa) | 35-40 | GB/T 5072 |
8 | Apparent Porosity (%) | 17-18 | GB/T 2997 | |
9 | Bulk Density (g/cm3) | 3.0-4.0 | ||
10 | Refractoriness Under Load (℃) | 1600-1750 | YB/T 370 | |
2.镁粉
| No. | Chemical composition (%) | Typical value | Test method | |
1 | Magnesia granule (1-3 Mesh) | MgO | ≥89 | GB/T 5069 |
2 | Magnesia Powder (200 Mesh) | ≥80 | ||
3.镁砖
| No. | Items | Typical value | Test method | |
1 | Chemical composition (%) | MgO | 91-98 | GB/T 5069 |
2 | CaO | ≤3.0 | ||
3 | SiO2 | ≤2.5 | ||
4 | Physical Properties | Cold Crushing Strength (Mpa) | 55-60 | GB/T 5072 |
5 | Apparent Porosity (%) | 16-18 | GB/T 2997 | |
6 | Refractoriness Under Load (℃) | 1520-1700 | YB/T 370 | |