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　　Alumina Bead Ceramic Balls
Physical Properties
Item
Unit Index
Chemical compositionIndex
Specific gravity
g/cm3
2.8-3.5
Specific heat
cal/g℃
0.17-0.20
Compressive
kg/cm2
＞1500
Hardness
Mohs grade
≥7
Wear ability rate
%
0.05
Water aborption rate
%
＜1
　　　Chemical Composition  
Compositions
Index
Al2O3
80-95%
SiO2
3-17%
MgO
0.5%
Fe2O
0.3%
CaO
0.2%
Na2O
0.1%
Other
trace
Inert Alumina Balls
Name
Fr(E)
RA-1
KA-201
G-A
Our country
Al2O3(%)
≥91.5
≥91.5
≥93.6
≥94.6
≥92.3
SiO2(%)
0.02
0.10
0.02
0.02
≥2.0
Fe2O3(%)
0.03
0.02
0.02
0.04
0.05
Na2O(%)
≥0.60
0.50
0.30
0.60
0.34
TiO2(%)
0.002
0.002
0.002
0.002
0.002
Inert Alumina Balls Physical Data
Capacity (t/m3)
2.4-2.6
Mohs
7
Pile and melt heavily (t/m3)
2.2-2.4
Absorbing water rate （%）
≤1
Able to bear temperature (℃)
140-1450
It is cold to quench （℃）
200-800
Do not split three times
Able to bear the stability (℃)
500-800
Resist the intensity of turning back （kg/cm3）
2000
Compression strength (kg/cm3)
3500
Colour
White chromosphere one
Able to bear the acidity (%)
≥99.8
Alkali-resisting degree (%)
≥98.5
Remarks

6 meters fall into the stencil plate and does not split freely
 
Refractory ceramic balls
1、Compressive Strength ≥500kg/cm2
2、Softening point under Load ≥1450℃
3、Heat Resistance≥1770℃ 　　　
4、Porosity ≤21
5、Contract after burn≤0.1%
 
　 　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　
 

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