Refractory Bricks
ultra low cement castable

ultra low cement castable

Ultra-low cement refractory castable is developed on the basis of low-cement refractory castables. The amount of aluminate cement is generally 2.5% ~ 5%, the performance is better than low cement refractory castable. Ultra-low cement refractory castable varieties are more widely used.

Ultra-low cement refractory castable preparation principles and strength characteristics, and low cement refractory castable is basically the same, its strength slightly higher.

Ultra-low cement refractory castable composition: refractory aggregate, refractory powder, the amount of ultra-fine powder, amount or a small amount of calcium aluminate cement and trace dispersant.

Products

Ultra low cement castable

Material

Clay

High alumina

Corundum

Bulk density(g/cm3)

110℃×16h≥

2.35

2.70

3.20

 

1500℃(1350℃)×3h≥

2.30

2.65

3.15

Chemical composition(%)

AL2O3 ≥

45

75

95

 

CaO ≤

1.15

1.15

1.15

Flexible strength(MPa)

110℃×16h≥

6

6

8

 

1500℃(1350℃)×3h≥

8

8

10

C.C.S(MPa)

110℃×16h≥

40

40

60

 

1500℃(1350℃)×3h≥

70

800

90

L.C.(%)

110℃×16h≤

-0.1

0

0

 

1500℃(1350℃)×3h≤

±0.5

±0.5

±0.5

Refractoriness(℃)≥

1710

1790

1790

Service temperature(℃)

1400

1450

1650


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