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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
Lower sodium £¨I£©
Middle sodium £¨II£©
Fraction(mesh)
0-1 1-2 3-5mm
Fine(mesh)
0-180 0-320
Fraction(mesh)
0-1 1-2 3-5mm
Fine(mesh)
0-180 0-320
Guarantee Value
Typical value
Guarantee Value
Typical value
Guarantee Value
Typical value
Guarantee Value
Typical value
Chemical Composition (%) ¦Á-Al2O3
¡Ý99
99.3
¡Ý98.5
99.23
¡Ý99
99.14
¡Ý98.5
98.75
SiO2
¡Ü0.2
0.15
¡Ü0.3
0.22
¡Ü0.4
0.12
¡Ü0.4
0.19
Fe2O3
¡Ü0.2
0.04
¡Ü0.25
0.04
¡Ü0.2
0.01
¡Ü0.25
0.05
Na2O
¡Ü0.15
0.12
¡Ü0.25
0.18
¡Ü0.4
0.35
¡Ü0.5
0.23
Principal crystalline phase
¦Á-Al2O3
Crystal system
Hexzagon
Colour
white
True density (g/cm3)
¡Ý3.95
Packing density (g/cm3)
1.75-1.95
Mohs hardness
9
Linear expansion (1/¡ãC)
8.3¡Á10-4
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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