Magnesia Alumina Spinel Bricks are high-performance basic refractory bricks made from high-purity magnesia, alumina, and spinel, offering excellent resistance to high-temperature slag corrosion, thermal shock, and mechanical wear.
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info@rsrefractories.comMagnesia Alumina Spinel Bricks are produced by combining high-quality magnesia, alumina, and synthetic spinel through pressing and high-temperature firing. The resulting bricks integrate the high refractoriness and slag resistance of magnesia with the thermal stability, corrosion resistance, and mechanical strength of alumina and spinel. MgO-Al₂O₃-Spinel bricks are ideal for use in demanding steelmaking and metallurgical environments, including electric arc furnaces (EAF), ladles, converters, and continuous casting tundishes. These bricks offer excellent resistance to basic slags, molten steel, and repeated thermal cycling, ensuring long service life, reduced maintenance, and high operational efficiency.
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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 |
|
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 are widely used in:
Electric Arc Furnace (EAF) hearths and sidewalls
Ladle linings and tapholes
Converter linings and furnace roofs
Continuous casting tundishes
High-wear zones exposed to molten steel and basic slags
Ferroalloy and non-ferrous metal furnaces
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