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Magnesia Alumina Spinel Brick

The magnesia-alumina spinel can be used in the cement kiln, not only avoid chrome pollution, and has good anti-stripping performance.

Magnesium Aluminum Spinel Brick Introduction

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.

Magnesia-Alumina Spinel Brick is in order to improve the heat stability of magnesia brick, add alumina oxide in ingredient to generate the magnesia brick which the main material is magnesia-alumina spinel. The advantage of magnesia-alumina spinel brick: good heat stability, in the process of use, it will have a reaction with clinker and produce a thin layer of calcium aluminate maskant, which makes the liquid not easy to penetrate, its anti-stripping performance is better than the directly bonded magnesia chrome brick.

Magnesia Alumina Spinel Bricks advantages

Good thermal shock resistance
High hot mechanical strength
High refractoriness under load
Excellent alkaline slag corrosion resistance

Magnesia Alumina Spinel Brick Physiochemical Index

Item Type-1 Type-2 Type-3 Type-4
MgO % 84 83 86 85
Al2O3 % 13.5 13.0 11.5 11.0
CaO % 1.1 1.2 1.1 1.2
Fe2O3 % 0.7 1.0 0.7 1.1
Apparent porosity % 17 17 17 17
Bulk density g/cm3 2.94 2.94 2.94 2.94
Crushing strength Mpa 60 55 60 55
Refractoriness under load ℃ 1700 1680 1700 1680
Thermal shock resistance /times(1100℃, water cooling) 10 5~10 10 5~10

Magnesia Alumina Spinel Bricks Applications

The main applications of magnesia alumina spinel bricks are rotary cement kilns, glass kiln checker-work, iron mixing furnaces, 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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