Mullite based castables with high RUL

     To meet severer working conditions of heating furnaces, mullite based castables are updated by adopting high purity binding system to improve refractoriness under load. They have brought about reduced deformation during long-term service at high temperature higher loading ability and longer service life. They have been adopted in many heating furnaces of Shoudu I & S Co., Wuhan I & S Co., Tangshan Guofeng I & S Co., Jiangyin Xingcheng Special Steel Co., etc. They have also been adopted in magnesium reduction furnace, with greatly improved service life, 5~8 times that of the previous brick linings.

产品规格

Properties specification of mullite based castable as with high RUL for heating furnace

 Type

SR-HC-60

SR-HC-65

SR-HC-70

Chemical analysis (%) ≥ 

Al2O3

 

60

 

65

 

70

 Bulk density (g/cm3)   ≥

 

110℃×24h

 

2.30

 

2.40

 

2.50

 

1350℃×3h

 

2.25

 

2.35

 

2.45

 Modulus of rupture Mpa ≥

 

110℃×24h

 

3

 

3

 

4

 

1350℃×3h

 

5

 

6

 

7

 

Compressive strength Mpa ≥

 

110℃×24h

 

25

 

30

 

30

 

1350℃×3h

 

50

 

50

 

50

Permanent change (%)

 

1350℃×3h

 

±0.5

 

±0.5

 

±0.5

Refractoriness Under Load (0.2MPa) T0.6 (℃)   ≥

 

1350

 

1400

 

1450

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