Magnesia-chrome bricks are refractory products with magnesium oxide (MgO) and chromium trioxide (Cr2O3) as the main components, and periclase and spinel as the main mineral components. The main raw materials for making magnesia-chrome bricks are sintered magnesia and chromite. The purity of magnesia raw materials should be as high as possible, and the chemical composition requirements of chromite are: Cr2O3 : 30 ~ 45% , CaO : ≤ 1.0 ~ 1.5% . Features: Magnesia-chrome bricks have high refractoriness, high high temperature strength, strong resistance to alkaline slag erosion, excellent thermal stability, and certain adaptability to acidic slag.
Magnesia-chrome bricks are mainly used in the metallurgical industry, such as building open-hearth furnace roofs, electric furnace roofs, external refining furnaces and various non-ferrous metal smelting furnaces.
Ultra-high power electric furnace wall, non-ferrous metal flash smelting furnace and other equipment.
In addition, magnesia-chrome bricks are also used in the firing zone of cement rotary kiln and the regenerator of glass kiln.
Ordinary bonded magnesia-chrome refractory bricks | |||||
Brand index | Mge-8 | Mge-10 | Mge-12 | Mge-16 | Mge-18 |
Cr2O3(%) ≥ | 8 | 10 | 12 | 16 | 18 |
Apparent porosity AP(%) ≤ | twenty two | twenty two | 20 | 18 | 18 |
Body density BD ( g/Cm3) | 2.95 | 3 | 3.05 | 3.1 | 3.1 |
Normal temperature compressive strength CCS Mpa ≥ | 35 | 35 | 35 | 35 | 35 |
0.20MPa load softening starting temperature ℃ | 1550 | 1580 | 1600 | 1650 | 1650 |
Thermal shock stability 1100 ℃ ≥ ( times ) | 4 | 4 | 4 | 4 | 4 |
Magnesia-chrome bricks are mainly used in the metallurgical industry, such as building open-hearth furnace roofs, electric furnace roofs, external refining furnaces and various non-ferrous metal smelting furnaces.
Ultra-high power electric furnace wall, non-ferrous metal flash smelting furnace and other equipment.
In addition, magnesia-chrome bricks are also used in the firing zone of cement rotary kiln and the regenerator of glass kiln.
Ordinary bonded magnesia-chrome refractory bricks | |||||
Brand index | Mge-8 | Mge-10 | Mge-12 | Mge-16 | Mge-18 |
Cr2O3(%) ≥ | 8 | 10 | 12 | 16 | 18 |
Apparent porosity AP(%) ≤ | twenty two | twenty two | 20 | 18 | 18 |
Body density BD ( g/Cm3) | 2.95 | 3 | 3.05 | 3.1 | 3.1 |
Normal temperature compressive strength CCS Mpa ≥ | 35 | 35 | 35 | 35 | 35 |
0.20MPa load softening starting temperature ℃ | 1550 | 1580 | 1600 | 1650 | 1650 |
Thermal shock stability 1100 ℃ ≥ ( times ) | 4 | 4 | 4 | 4 | 4 |
