Light weight castables with hollow balls as aggregates

      With good insulating property, high service temperature, high strength and limited thermal shrinkage, the series castables are made of mullite hollow balls, alumina bubbles and ultra-fines as raw materials, with cement as the main binder. They are suitable for working or back linings of various industrial furnaces working at high temperatures and where energy saving at high temperature is required.

产品规格

Properties specification of light weight castables with hollow balls as aggregates

 Type

SR-KLW-1.5

SR-KLW-1.8

SR-KLW-2.0

Chemical analysis (%) ≥ 

Al2O3

45

50

55

Bulk density (g/cm3)

110℃×24h

1.5±0.1

1.8±0.1

2.0±0.1

 Compressive strength Mpa ≥

110℃×24h

10

15

20

1350℃×3h

20

25

30

Permanent change (%)

1350℃×3h

±0.5

±0.5

±0.5

 

Thermal conductivity

W/ (m·K) ≤

700℃

0.65

0.70

0.75

1000℃

0.75

0.85

0.95

 Main raw material

Mullite based hollow balls and alumina bubbles

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