Magnesia Alumina Spinel Bricks are classified into ordinary models and high quality models according to raw material grades. RS brand magnesia alumina spinel bricks adopt high purity fused magnesia and spinel as main raw materials, their main crystalline phases are periclase and spinel, so they are also called periclase spinel bricks. Magnesia Alumina Spinel Bricks have very good high temperature performance. Impurity content, especially CaO content, is very low in magnesia alumina spinel bricks.
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Items |
Magnesia Alumina Spinel Brick |
Magnesia Alumina Brick |
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MLJ-90 |
MLJ-85 |
MLJ-80 |
MLJ-75 |
ML-80 |
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MgO % ≥ |
90 |
85 |
80 |
75 |
80 |
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Al2O3 % |
3~8 |
5~12 |
8~17 |
8~12 |
5~10 |
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Apparent Porosity % ≤ |
17 |
17 |
16 |
19 |
18 |
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Bulk Density (g/cm3) ≥ |
2.90 |
2.95 |
2.95 |
2.85 |
2.85 |
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Cold Crushing Strength (MPa) ≥ |
45 |
45 |
55 |
40 |
40 |
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0.2MPa Refractoriness Under Load ℃ ≥ |
1700 |
1700 |
1700 |
1650 |
1500 |
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Thermal Shock Resistance (1100℃, water cooling) ≥ |
3 |
8 |
12 |
8 |
4 |
Magnesia Alumina Spinel Bricks Applications
The main applications of magnesia alumina spinel bricks are rotary cement kilns, glass kiln checker-work, iron mixing furnace, refractory material sintering kilns and so on. Compared with magnesia chrome bricks, magnesia alumina spinel bricks have stronger alkaline vapor corrosion resistance, better free SOx corrosion resistance, better oxidization-reduction atmosphere change resistance, etc.
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