Magnesia-alumina spinel brick refers to a synthetic spinel refractory raw material using magnesium oxide and aluminum trioxide as raw materials. This raw material is rarely found in nature, and magnesium-aluminum spinel used in industry is all artificially synthesized. Bauxite-based sintered magnesia-aluminum spinel uses high-quality alumina with an Al2O3 content of more than 76% and high-quality light-burned magnesium powder with an MgO content of more than 95%. After a multi-stage homogenization process, it is heated to 1800°C in an ultra-high temperature tunnel kiln. It is sintered at the above high temperature.
Payment :
In AdvanceProduct Origin :
ChinaShipping Port :
Shanghai PortLead Time :
15 Working daysProduct parameters:
| Iterms | DYSMAS-1 | DYSMAS-2 | DYSMAS-3 | DYSMAS-4 |
| МgО％, ≥ | 88 | 86 | 84 | 82 |
| Аl2О3％, ≥ | 6 | 9 | 9 | 8 |
| SiО2％, ≥ | 0,5 | 0,5 | 0,8 | 1,0 |
| Bulk density, g/cm3 | 2.9 | 2.9 | 2.85 | 2.8 |
| Open porosity,%, ≤ | 18 | 18 | 19 | 20 |
| Compressive strength, N/mm², ≥ | 60 | 60 | 50 | 45 |
| Softening onset temperature, ℃, ≥ | 1700 | 1700 | 1680 | 1650 |
| Thermal resistance, ≥, times | 10 | 10 | 10 | 10 |
| Thermal conductivity, 1000℃, W/m K | 2.9 | 2.9 | 2.8 | 2.7 |
Product Feature:
Magnesia-alumina spinel bricks have good erosion resistance, strong corrosion and peeling ability, good slag resistance, abrasion resistance, good thermal shock stability, high temperature resistance and other performance characteristics. It is an ideal raw material for the production of refractory products such as magnesia-alumina spinel bricks, ladle lining bricks, and ladle castables used in the high-temperature zone of cement rotary kilns. Magnesia-aluminum spinel is widely used in refractory materials, steel smelting, cement rotary kilns and glass industrial kilns.
Application:
It has good corrosion resistance, abrasion resistance and good thermal shock stability. Its main uses: First, it can replace magnesia-chromium sand to make magnesia-alumina spinel bricks for use in cement rotary kilns, which not only avoids chromium pollution, but also has good spalling resistance; second, it is used to make ladle castables, which greatly improves The corrosion resistance of steel plate lining. Making it widely used as refractory materials for steelmaking. The preparation of high-quality pre-synthesized spinel provides new raw materials for the production of amorphous and shaped high-purity refractory materials.
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