Magnesia chrome bricks are generally produced from sintered magnesia and refractory grade chrome ore. The refractory grains are silicate-bonded. The domestic magnesia-chrome bricks generally refer to ordinary magnesia-chrome bricks that are fired. Chrome bricks.
Magnesia chrome bricks are refractory products containing magnesium oxide (MgO) and chromium oxide (Cr2O3) as the main components, and periclase and spinel are the main mineral components. This type of brick has high refractoriness, high temperature strength, strong resistance to alkaline slag, excellent thermal stability, and certain adaptability to acidic slag. The main raw materials for the manufacture of magnesia chrome bricks are sintered magnesia and chromite. The purity of the magnesia raw material should be as high as possible. The requirements for the chemical composition of the chromite ore are: Cr2O3: 30-45%, CaO: ≤ 1.0-1.5%.
Magnesia chrome brick has a refractoriness of more than 2000 ° C, and the load softening temperature is generally above 1550 ° C. The high temperature volume stability is good, and the resistance of cooling and heat is stronger than that of magnesia brick.
Technical Parameter of Magnesia Chrome Bricks:
| Item | Magnesia Chrome Bricks | ||||
| DMC-20 | DMC-18 | DMC-12 | DMC-8 | ||
| Chemical | MgO ％ | 55 | 60 | 65 | 80 |
| Composition | SiO2 ％ | 2.5 | 2.4 | 1.5 | 1.5 |
| Cr2O3 ％ | 20 | 18 | 18 | 18 | |
| Apparent Porosity ％ | 18 | 18 | 18 | 18 | |
| Cold Crushing Strength Mpa | 40 | 40 | 40 | 40 | |
| 0.2Mpa Refractoriness Under Load T0.6 | 1700 | 1700 | 1680 | 1650 | |
| Bulk Density g/cm3 | 3.15 | 3.1 | 2.98 | 2.95 | |
