Product Details

Magnesia Alumina Spinel bricks

Introduction:

Magnesia alumina spinel brick (also called Magnesia Aluminate Brick) is a high-grade basic refractory with periclase and spinel as the main raw minerals. Magnesium aluminate spinel was synthesized by solid oxide reaction route at 1400℃ then compressed by high-pressure molding and high-temperature sintering, the materials finally form into the stable spinel phase MgO·Al₂O₃ (MgAl₂O₄). At the same time, special mineralizer is added to make the crystal phase particles of products directly combine. It has the characteristics of high strength, good thermal shock stability and strong resistance to chemical erosion. It is mainly used in the upper and lower transition zone of cement rotary kiln and thermal kiln equipment requiring high temperature resistance and heat shock resistance.

Magnesia Alumina Spinel Bricks Properties

1. High melting point

2. Small thermal expansion

3. Low thermal stress

4. Good thermal shock stability

5. Stable chemical properties

6. Strong resistance to basic slag

Chemical & Technical Index

Items		XHJMA-70	XHJMA-75	XHJMA-80	XHJMA-85	XHJMA-90
Chemical Composition	MgO, %	≥70	≥75	≥80	≥85	≥90
	AL₂O₃, %	≥18	≥13	≥10	≥10	≥8
	SiO₂, %	≥6	≥5	1.2	1.0	0.6
Apparent Porosity	%	≤18	≤18	≤17	≤17	≤15
Bulk Density	g/cm³	≥2.80	≥2.90	≥2.90	≥2.90	≥2.95
CCS	Mpa	≥40	≥40	≥50	≥60	≥60
RUL	℃	≥1620	≥1650	≥1670	≥1700	≥1700
Thermal shock resistance(TSR)	1100℃ (water, times)	≥15	≥15	≥28	≥28	≥35