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Magnesium Aluminate Spinel

The magnesium aluminate spinel is a new-type synthetic refractory material featuring high purity, high volume density, great thermal shock resistance, satisfactory corrosion resistance, etc. The synthetic refractory material is able to significantly improve the slag resistance and thermal shock resistance of refectory products, fabricated parts, unshaped refectories after the magnesium aluminate spinel is added into them.

The artificial refractory material is mainly used to produce high-end magnesium aluminate spinel brick, high-performance magnesium aluminate castable, sliding nozzle, ladle brick, sliding plate for continuous casting, nozzle brick, brick for open-hearth furnace and so on, largely increasing their thermal shock resistance. The magnesium aluminate spinel is a high-purity refractory material made by fusing in an electric arc furnace, ideal for replacing magnesium-chrome refectories.

Note: sintered magnesium aluminate spinel is classified into bauxite-based sintered spinel and alumina-based high-purity sintered spinel.

Technical Indicators of Electric Smelting Magnesium Aluminate Spinel

Properties / product number AM-90 AM-85 AM-70
Chemical composition (%) Al2O3 88-92 82-87 71-76
MgO 8-12 12-17 22-27
CaO ≤0.4 ≤0.4 ≤0.6
Fe2O3 ≤0.35 ≤0.35 ≤0.35
SiO2 ≤0.25 ≤0.4 ≤0.4
True specific gravity(g/cm³) ≥3.3
Grain size of section sand(mm) 0-1/1-3/3-5/5-8...
Powder (mesh) -180 -220 -240 -320...

Technical Indicators of Bauxite-Based Sintered Spinel (Product Number: Sc-Mas58/90/78/66)

Product number Chemical composition (%) Water Absorbing Capacity (%) B.D ( g/cm 3)
Al2O3 MgO SiO2 Fe2O3
MAS58 58-63 28-32 ≤4.0 ≤1.8 ≤1.5 ≥3.15

Technical Indicators of Alumina-Based High-Purity Sintered Spinel

Product number Chemical composition (%) Explicit porosity (%) B.D ( g/cm 3)
Al2O3 MgO SiO2 Fe2O3
MAS90 88-91 9-11 ≤0.3 ≤0.3 ≤3.0 ≥3.30
MAS78 76-79 21-24 ≤0.4 ≤0.5 ≤3.0 ≥3.20
MAS66 64-67 32-35 ≤0.5 ≤0.5 ≤3.0 ≥3.10

Related Names
Transparent Ceramic

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