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Refractory material-
White Fused Alumina (Refractory grade)
White Fused Alumina (Refractory grade)
White Fused Alumina(WFA or WA)is made from chemical by Higgns furnace or Tilting furnace at high temperature.It is very important raw material for advanced refractories and abrasives.Its properties are as folowing.
Type
Properties
Middle sodium (II)
Fraction(mesh)
0-1 1-2 3-5m/m
Fine(mesh)
0-180 0-320
Guarantee Value
Typical value
Guarantee Value
Typical value
Chemical Composition (%)
α-Al
2
O
3
≥99
99.14
≥98.5
98.75
SiO
2
≤0.4
0.12
≤0.4
0.19
Fe
2
O
3
≤0.2
0.01
≤0.25
0.05
Na
2
O
≤0.4
0.35
≤0.5
0.23
Principal crystalline phase
α-Al
2
O
3
Crystal system
Hexzagon
Colour
white
True density (g/cm
3
)
≥3.95
Packing density (g/cm
3
)
1.75-1.95
Mohs hardness
9
Linear expansion (1/
°
C)
8.3×10
-4
Size(mm)
8-5 5-3 3-1 1-0
Fine(mesh)
-80,-120,-240,-320
Micropowder(um)
3-5 5-10
Test standard
GB/T3044-89
Packing
25kg/bag 1000kg/big bag
Usage
Refractories
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