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Brief introduction of magnesia brick
The main component of magnesia brick is magnesia, the content of magnesia is generally more than 90%, and the main crystal is diopside. Magnesia bricks are generally divided into sintered magnesia bricks and chemical combined magnesia refractory bricks. For sintered magnesia bricks, the direct contact type is called direct bonded magnesia bricks, and the electric fusion type is called coincidence fused magnesia bricks.
Application of magnesia brick:
Magnesia bricks are widely used in the lining of iron and steel smelting furnaces, ferroalloy fiber cable furnaces in the iron and steel industry, furnaces in the nonferrous metallurgy industry (such as the lining of copper, lead, zinc, tin), kilns in the building materials industry, furnace bodies and regenerator grids of heat exchangers in the glass industry, high-temperature calciners, shaft furnaces, tunnel kilns in the refractory industry, etc.
Parameters of magnesia brick:
| Item | MZ-91 | MZ-92 | MZ-93 | MZ-94 | MZ-97 |
| MgO, % ≥ | 91 | 92 | 93 | 94.5 | 97 |
| SiO2, % ≤ | 4 | 3.5 | 2.5 | 2 | 2 |
| Fe2O3, % ≤ | 1.3 | – | – | 1.2 | 1.2 |
| CaO, % ≤ | 2.5 | 2.5 | 2 | 1.8 | 1.8 |
| Apparent Porosity, ％ ≤ | 18 | 18 | 18 | 18 | 18 |
| Bulk Density, g/cm3 ≥ | 2.86 | 2.9 | 2.95 | 2.92 | 2.95 |
| Cold Crushing Strength Mpa, ≥ | 60 | 60 | 50 | 60 | 60 |
| 0.2Mpa Refractoriness Under Load T0.6 ℃ | ≥1570 | ≥1560 | ≥1620 | ≥1650 | ≥1700 |
| Thermal Shock Resistances 100 ℃ water cycles | ≥18 | ≥18 | ≥18 | ≥18 | ≥18 |