Magnesia Alumina Spinel Fire Brick

MgO% (≥)75-90
Bulk Density (g/cm³) 2.85-2.95
Refractoriness Under Load (℃)1650-1700
Cold Crushing Strength (MPa) 40-55

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Magnesia Alumina Spinel Brick

Magnesia alumina spinel brick is a kind of alkaline refractory product with periclase as main phase and magnesia-alumina spinel clinker as basic material. The product is of good temperature vibration, good strength and volume stability in high temperature environment.

Item	Specification
	MLJ-90	MLJ-85	MLJ-80	MLJ-75
MgO %	≥90	≥85	≥80	≥75
Al₂O₃ %	3~8	5~12	8~17	≥8~12
Apparent Porosity, %	≤17	≤17	≤16	≤19
Bulk Density, g/cm³	≥2.95	≥2.95	≥2.90	≥2.85
Cold Crushing Strength, MPa	≥45	≥45	≥55	≥40
0.2MPa RUL℃	≥1700			≥1650
TSR, Cycle 1100℃ Water	≥3	≥8	≥12	≥8

Application:

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

2. It can be used in refractory carstables for ladles, which greatly improve the anti-erosion ability. It is widely applied to steel-making refractory material. The preparation of high quality pre-synthertic spinel provide a new material for amorphous and fixed high purity refractory.

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