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Brief description of magnesia alumina spinel brick
Magnesia aluminum spinel brick is made of high quality synthetic spinel raw material and special technology. The product has the characteristics of high compressive strength, good thermal shock stability, good thermal creep performance and high load softening temperature. At the same time, it also has the characteristics of magnesia-chromium bricks easily sticking to the kiln skin, which solves the problem of pollution of the environment by hexachromium potassium produced by magnesia-chromium bricks used in cement kilns.
Application of magnesia aluminum spinel brick
1.Steel industry
Steel furnace lining, ferroalloy furnace lining, metal mixing furnace lining, converter furnace lining, electric arc furnace wall and furnace bottom, submerged furnace, heating furnace bottom
2.Non-ferrous metallurgy industry
Copper, nickel, lead, zinc, tin smelting furnace lining, refining copper reflection furnace lining, ore electric furnace lining
3.Glass industry
Glass furnace battery inspector
4.Building materials industry
Lime kiln, cement kiln
5.Refractory industry
High temperature calcination kiln, vertical kiln, tunnel kiln
Parameters of magnesia alumina spinel brick
| Iterms | KRSH-1 | KRSH-2 | KRSH-3 | KRSH-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 |
Features of magnesia aluminum spinel brick
Poor thermal shock resistance and stable furnace temperature.
Poor volumetric stability at high temperatures, and proper expansion joints must be reserved when masonry is built.
Magnesia aluminum spinel brick has strong thermal conductivity and sometimes needs insulation material.