Product Introduction
Magnesia alumina spinel brick is made of high-purity magnesia sand and pre-synthesized magnesia-alumina spinel as the main raw materials, and is made after reasonable grading, high-pressure molding, and high-temperature firing. Magnesia alumina spinel bricks has excellent characteristics such as low porosity, high strength, good thermal shock stability, and corrosion resistance. This product consumes the materials of the transition zone and the firing zone synchronously, which increases the service life of the rotary kiln lining.
The amount of magnesium aluminum spinel bricks in the production of magnesium-aluminum spinel bricks is not as high as possible. As the amount of spinel increases, the thermal shock resistance is better, but the strength (especially the flexural strength) is caused by the mismatch expansion. ), with Al2O3 as the standard, the Al2O3 in the product should not be greater than 15%~20%, preferably 10%~18%.
Technical Data
| Item | Mg0 | Al2o3 | Sio2 | Bulk Density | Apparent Density | Cold Crushing | Refractoriness under | ThermalShock Stability |
| (%) | (%) | (%) | (g/cm3) | (%) | Strength(Mpa) | Load of 0.2 Mpa(℃) | (1000℃,water,quencing,cycle) | |
| RS-85A | 85 | 9 | 1 | 18 | 2.95 | 45 | 1700 | 100 |
| RS-85B | 82 | 9 | 2 | 18 | 2.9 | 40 | 1700 | 80 |
| RS-85C | 80 | 9 | 3 | 19 | 2.85 | 40 | 1650 | 70 |
| RS-93A | 93 | 5 | 1 | 18 | 2.95 | 45 | 1700 | 80 |
| RS-90B | 90 | 5 | 2 | 18 | 2.9 | 40 | 1700 | 70 |
Application
The magnesia-alumina spinel is used in cement rotary kiln, which not only avoids chrome pollution, but also has good resistance to spalling and Magnesium alumium spine firebricks is used to make ladle castable , greatly improve the erosion resistance of the steel lining. Magnesium alumium spinel is widely used in steelmaking refractories. The preparation of high quality pre-synthesized spinel provides new raw materials for the production of amorphous and shaped high-purity refractories.