Description of Fused Magnesia Brick
Magnesite Bricks are produced with more than 90% magnesium oxide content as the raw material and periclase as the principal crystalline phase after smashing, mulling, molding, firing and drying in the high temperature. Magnesite Bricks can be classified into two types of burnt magnesite bricks and unburnt magnesite bricks.Magnesite Bricks are mainly used in electric furnace, tunnel kiln, rotary kiln and glass furnace with great properties of high refractoriness and good alkali slag erosion resistance.
Performance of Fused Magnesia Brick
(1) Slag resistance. Magnesia bricks are basic refractory bricks. They have strong resistance to alkaline slags such as CAO and FEO. They are often used as masonry materials for alkali kilns, but they have poor resistance to acid slags and cannot be contacted with acid refractories.
(2) High refractoriness. Magnesia bricks have the highest refractoriness of general refractory bricks, which can reach 2000 degrees.
(3) Good thermal conductivity and Hydration, but poor high temperature volume stability.
(4) High loading softening temperature between1500-1550 degrees.
Technical Dates of Fused Magnesia Brick
| Item | Fused Magnesite Bricks | ||||
| Grade | DMZ-92 | DMZ-95 | DMZ-96 | DMZ-97 | DMZ-98 |
| MagO (%) | 92.5 | 95.2 | 96.1 | 96.65 | 97.2 |
| CaO (%) | 1.8 | 1.55 | 1.35 | 1.3 | 0.98 |
| SiO2 (%) | 3.5 | 1.95 | 1.32 | 1.1 | 1 |
| 0.2Mpa Refractoriness Under Load T0.6 ℃ | 1600 | 1700 | 1700 | 1701 | 1702 |
| Cold Crushing Strength (Mpa) | 80 | 85 | 85 | 84 | 86 |
| Bulk Density g/cm³ | 2.96 | 2.98 | 3.05 | 3.06 | 3.08 |
| Apparent Porosity % | 15.5 | 15.2 | 14.7 | 14.8 | 14.6 |
Application of Fused Magnesia Brick
Fused Magnesia Bricks are Mainly used in steel-making alkaline furnace, electric furnace hearth and furnace wall, permanent lining of oxygen converter, non-ferrous metal smelting furnace, high-temperature tunnel kiln, calcined magnesia brick and cement kiln lining, furnace hearth and furnace wall, Glass kiln regenerators lattice bricks.
