>>Alumina
and Alumina Hollow Ball Heat Insulation Brick
The alumina insulating brick is
made adopting foaming method and shaped through
casting and hi-temperature firing. The alumina hollow
ball heat insulating brick is vibrating-shaped with
melting-sprayed alumina hollow ball and compounded
cement. Such kind of processing method has the special
characteristics of small heat conductivity, high
loading and softening temperature involving and
small re-firing linear change etc., being widely
used as heat insulating layer of hi-temperature
thermal-operation equipment or as the lining for
flame direct-working furnace kiln and equipment
with precision thermal operation etc.
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name
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Alumina Insulation Brick
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Alumina Hollow Ball Heat Insulation
Brick
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Al2O3%
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≥80
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≥85
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90
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≥95
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≥97
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≥98
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Fe2O3%
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≤0.5
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≤0.5
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≤0.5
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≤0.4
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≤0.4
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≤0.4
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Volume Density
(g/cm3)
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≤0.6
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≤0.8
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≤1.0
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≤1.2
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≤1.4
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≤1.6
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Intensity
of Constant Temperature (Mpa)
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≥2.0
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≥3.0
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≥4.0
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≥3.0
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≥10
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≥12
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Intensity of Anti-Pressing After-Firing
%1600℃×2h
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≤0.5
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≤0.5
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≤0.5
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≤0.4
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≤0.4
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≤0.4
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Thermal Conductivity
w/m 350℃
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≤0.7
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≤0.6
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≤0.5
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≤0.4
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≤0.3
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≤0.3
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Use Temperature
℃
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1500
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1550
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1600
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1600
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1650
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1700
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>>Hi-Temperature
Clay and Binding Agent
The hi-temperature clay has the
special properties of hi-binding-intensity, slag-blocking,
small mortar joint and ductility, easy for construction.
As a kind of necessary material with the related
other materials, it can be used for laying various
bricks of kilns and furnaces.
The hi-temperature clay has its properties of excellent
air tightness and adhesion strength, being widely
used for sealing hot-blast furnace pipe and binding
ceramic fibers etc.
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Designation,
Target , Project
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Al2O3%
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Intensity of Binding
in Cold Bending (MPa)
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Fire-Resisting
Degree℃
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Use Temperature
℃
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Binding time (min)
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corundum gooey APA
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≥85
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≥3.5
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≥1790
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1600
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1~1.5
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High-Alumina gooey APB
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≥60
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≥2.5
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≥1750
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1500
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1~1.5
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Clay gooey APC
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≥50
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≥1.5
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≥1730
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1400
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1~1.5
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Hi-Temperature
Binding Agent A
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≥1
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900
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Hi-Temperature
Binding Agent B
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≥2
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1400
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