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£© |
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Fraction(mesh) 0-1 1-2 3-5m/m |
Fine(mesh) 0-180 0-320 |
Fraction(mesh) 0-1 1-2 3-5m/m |
Fine(mesh) 0-180 0-320 |
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Guarantee Value |
Typical value |
Guarantee Value |
Typical value |
Guarantee Value |
Typical value |
Guarantee Value |
Typical value |
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| 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 |
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| Crystal system | Hexzagon |
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| Colour | white |
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| True density (g/cm3) | ¡Ý3.95 |
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| Packing density (g/cm3) | 1.75-1.95 |
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| Mohs hardness | 9 |
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| Linear expansion (1/¡ãC) | 8.3¡Á10-4 |
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| Size(mm) | 8-5 5-3 3-1 1-0 |
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| Fine(mesh) | -80,-120,-240,-320 |
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| Micropowder(um) | 3-5 5-10 |
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| Test standard | GB/T3044-89 |
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| Packing | 25kg/bag 1000kg/big bag |
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| Usage | Refractories |
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