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Magnesium aluminum spinel brick

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Magnesium aluminum spinel brick
Magnesium-aluminum spinel brick refers to an alkaline refractory material which is made by using magnesia and industrial lead oxide or bauxite as raw materials, which is pulverized and formed and fired at about 1600 °C. The refractoriness is greater than 2000 ° C, the resistance to quenching and rapid heat is better than that of magnesia brick, and it can resist the erosion of alkaline slag. It is used for masonry and alkali making of flat steel furnaces and electric furnaces.
Magnesium-aluminum spinel brick is a chromium-free alkaline product specially developed for the transition zone of large dry cement kiln. It has the characteristics of high strength, corrosion resistance, excellent thermal shock stability and no chrome pollution. It is applied in cement kiln of 3000t/d or above in large cement enterprises, and the cycle has reached the international advanced level, replacing imported, it is a new type of refractory material.
In order to solve the problem that the thermal conductivity of ordinary magnesium-aluminum spinel brick is large and the temperature of the kiln cylinder is too high during use, our factory has successfully developed a magnesium-aluminum spinel composite brick.

AVAILABLE SIZES

Technical Indicators


Index item

CJ-MgAl-80

CJ-MgAl-85

CJ-MgAl-93

CJ-MgAl-95

MgO,%,

80

85

88

93

Alr2O3,%,

9-13

9-13

5

3

Fe2O3 ,%

0.7

0.7

0.7

0.7

SiO2,%

3.0

1.0

0.7

0.8

Density, g/cm3

2.85

2.95

2.95

2.95

0.20 MPa Load softening start temperature, ≥℃

1650

1700

1700

1700

Apparent porosity %,

19

18



Normal atmospheric temperature Compressive strength ,MPa,

40

45

45

45

Thermal Vibration Stability TSR   (950,   Water Cooling, frequency)

100

100

100

100

Thermal conductivity(1000)

3.0

2.9

2.9

2.9

Thermal expansion rate(1400)%

1.6

1.2

1.2

1.2


Tel: 0086-533-3190823

caojian@cj-ceramicfiber.com


 

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