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 |
|
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
Comprehensive Refractory Product Range
We manufacture 3 main types of refractory materials — refractory castables, high alumina cement, and refractory bricks — covering 100+ industrial furnace types worldwide.
Certified Quality and International Standards Compliance
All batches undergo strict quality control. Products comply with ISO, ASTM, and GB standards, ensuring reliable performance in high-temperature industrial applications.
Annual Production Capacity of 130,000 Tons
With a large-scale capacity of 130,000 tons per year, we guarantee stable supply and on-time delivery for long-term and large-volume projects.
Exported to 120+ Countries and 1,000+ Projects
Our products have been successfully delivered to over 120 countries, supporting more than 1,000 industrial projects, including cement, steel, incineration, glass, and petrochemical furnaces.
20+ Years of Experience in Refractory Manufacturing
With over 20 years of experience, we understand real furnace conditions and deliver materials proven in long-term industrial operations worldwide.
Professional Technical Support and Free Samples
We provide technical assistance from material selection to installation guidance, with free samples available for testing and supporting 1,000+ projects globally.
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