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Bubble Alumina Brick

(1)Made by alumina bubble alumina powder,add other binder,(2)Mixing, drying, forming, firing at the temperature of 1700 C shuttle kiln.

Item

85

90

99

Max service temperature

1750C

1800C

1800C

Al2O3/%

85

90

99

SiO2 /%

14

9

0.3

Fe2O3/%

0.2

0.2

0.2

Bulk density/g.cm3

1.4-1.9

1.4-1.9

1.5-1.8

Cold crushing strength/Mpa

18

18

15

Refractoriness under load (0.1MPa,0.6%)

1700C

1700C

1700C

Reheating Linear Change % (1600 C,8h) 

0.3

0.2

-0.25

Thermal expansion coefficient

(Room temp-1300C)

7.8

8.0

8.6

Thermal conductivity w/(m.k) (Average 800C)

0.55

0.6

0.75

Bubble alumina brickmainly used in the industries such as metallurgical,refractories,ceramics,petrochemical. It can be used as the hot face refractory lining of pyolyzerhot blast furnace reheating furnace,tunnei kiln,pushed slab kiln,crucible furnace,electric furnace etc.

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