High Alumina Refractory Cement

High Alumina Refractory Cement

1. Used in pizza ovens, incinerators, various boilers, furnaces, etc.
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  Description

High Alumina Refractory Cement (previously called bauxite cement) is a kind of grinding hydraulic cementing materials with clinker about 50% alumina content and has calcium aluminate as the main material, which is also called refractory cement, which can be made to low cement high alumina castable to build or repair all kinds of furnace and kilns for thermal insulation or acid erosion resistance with high strength.

  Technical Data:

Product

CA-65

CA-68

CA-70

CA-75

CA-80

Chemical Composition
(%)

Al2O3

64-66

67-69

69-71

73-75

77-80

 

CaO

32-34

29-31

27-29

23-25

18-20

 

SiO2

1.8

1.2

0.3

0.3

0.3

 

Fe2O3

0.6

0.6

0.3

0.3

0.3

 

Specific Surface
(cm2/g)

4500

4500

5000

5500

7000

Setting time
(h:min)

Initial setting (min)

0:40

0:40

0:40

0:45

0:45

 

Final Setting (min)

8:00

8:00

10:00

10:00

10:00

 

Cold Modulus 
of Rupture
(MPa) min

24 hour

6.0

6.0

6.0

6.0

5.0

 

72 hour

8.0

8.0

8.0

8.0

6.0

Cold Crushing Strength
(MPa) min

24hour

45.0

45.0

45.0

45.0

35.0

 

72hour

70.0

70.0

70.0

70.0

60.0

 

Refractoriness
(°C)

1680

1710

1730

1750

1770

  Application:

Metallurgical Furnaces: Blast furnaces, electric arc furnaces, aluminum smelting.

Ceramic Kilns: Tunnel and vertical kilns.

Glass Melting Kilns: For high-temperature melting.

Cement Kilns: In cement production.

Heat Treatment Furnaces: Annealing, quenching, and tempering.

Casting Furnaces: Iron and copper melting.

Chemical Furnaces: Cracking and ammonia synthesis.

Waste Incinerators: High-temperature waste treatment.

Thermal Power Boilers: Circulating fluidized bed boilers.

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