Refractory Mortars

FIRECLAY REFRACTORY MORTARS

Goods Brand

NN-30

NN-38

NN-42

NN-45A

NN-45B

Refractoriness ( ℃)

1630

1690

1710

1730

1730

Al2O3(%) min

30

38

42

45

45

Cold bending strength (MPa) min

after drying at 110 ℃

1.0

1.0

1.0

1.0

2.0

after burning at 1200℃x3h

3.0

3.0

3.0

3.0

6.0

Refractriness under load 0.2 Mpa T2.0 ( ℃) min

***

1200

Shrinkage after reheating  (%) max

after burning at 1200℃x3h

+1~-3

***

after burning at 1300℃x3h

**

+1~-5

Bonding time (min)

1~3

Size (%)

-1.0mm

100

+0.5mm max

2

-0.074mm min

50