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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-Al 2 O 3 |
¡Ý 99 |
99.3 |
¡Ý 98.5 |
99.23 |
¡Ý 99 |
99.14 |
¡Ý 98.5 |
98.75 |
SiO 2 |
¡Ü 0.2 |
0.15 |
¡Ü 0.3 |
0.22 |
¡Ü 0.4 |
0.12 |
¡Ü 0.4 |
0.19 |
Fe 2 O 3 |
¡Ü 0.2 |
0.04 |
¡Ü 0.25 |
0.04 |
¡Ü 0.2 |
0.01 |
¡Ü 0.25 |
0.05 |
Na 2 O |
¡Ü 0.15 |
0.12 |
¡Ü 0.25 |
0.18 |
¡Ü 0.4 |
0.35 |
¡Ü 0.5 |
0.23 |
Principal crystalline phase |
¦Á-Al 2 O 3 |
Crystal system |
Hexzagon |
Colour |
white |
True density (g/cm 3 ) |
¡Ý 3.95 |
Packing density (g/cm 3 ) |
1.75-1.95 |
Mohs hardness |
9 |
Linear expansion (1/ ¡ã C) |
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 |
White Fused Alumina £¨Abrasive grade£©
WA for Abrasives Composition of the Grain Size Standard
£¨ISO8486£º1996¡¢FEPA42¡¢GB1984¡¢JIS R6001-1998¡¢ANSI B74.12-1992¡¢GB/T2481.1-1998£©£º
Grain size |
Best Coarse |
Coarse |
Normal part |
Mixed part |
Fine part |
100%pass these mesh NO. |
Not pass mesh NO |
Weight%short |
Not pass |
Weight%More than |
Not pass mesh NO |
Weight%More than |
More than 3% pass these mash NO. |
F4 |
5/16 |
31/2 |
20 |
4 |
40 |
4 5 |
70 |
6 |
F5 |
0.265 |
4 |
20 |
5 |
40 |
5 6 |
70 |
7 |
F6 |
31/2 |
5 |
20 |
6 |
40 |
6 7 |
70 |
8 |
F7 |
4 |
6 |
20 |
7 |
40 |
7 8 |
70 |
10 |
F8 |
5 |
7 |
20 |
8 |
45 |
8 10 |
70 |
12 |
F10 |
6 |
8 |
20 |
10 |
45 |
10 12 |
70 |
14 |
F12 |
7 |
10 |
20 |
12 |
45 |
12 14 |
70 |
16 |
F14 |
8 |
12 |
20 |
14 |
45 |
14 16 |
70 |
18 |
F16 |
10 |
14 |
20 |
16 |
45 |
16 18 |
70 |
20 |
F20 |
12 |
16 |
20 |
18 |
45 |
18 20 |
70 |
25 |
F22 |
14 |
18 |
20 |
20 |
45 |
20 25 |
70 |
30 |
F24 |
16 |
20 |
25 |
25 |
45 |
25 30 |
65 |
35 |
F30 |
18 |
25 |
25 |
30 |
45 |
30 35 |
65 |
40 |
F36 |
20 |
30 |
25 |
35 |
45 |
35 40 |
65 |
45 |
F40 |
25 |
35 |
30 |
40 |
40 |
40 45 |
65 |
50 |
F46 |
30 |
40 |
30 |
45 |
40 |
45 50 |
65 |
60 |
F54 |
35 |
45 |
30 |
50 |
40 |
50 60 |
65 |
70 |
F60 |
40 |
50 |
30 |
60 |
40 |
60 70 |
65 |
80 |
F70 |
45 |
60 |
25 |
70 |
40 |
70 80 |
65 |
100 |
F80 |
50 |
70 |
25 |
80 |
40 |
80 100 |
65 |
120 |
F90 |
60 |
80 |
20 |
100 |
40 |
100 120 |
65 |
140 |
F100 |
70 |
100 |
20 |
120 |
40 |
120 140 |
65 |
200 |
F120 |
80 |
120 |
20 |
140 |
40 |
140 170 |
65 |
230 |
F150 |
100 |
140 |
15 |
200 |
40 |
200 230 |
65 |
325 |
F180 |
120 |
170 |
15 |
200 230 |
40 |
200 230 270 |
65 |
|
F220 |
140 |
200 |
15 |
230 270 |
40 |
230 270 325 |
65 |
|
| F240 |
170 |
200 |
5 |
230 270 |
8 |
230 270 325 |
38 |
£¨1£©The mark for same grain size is mentioned defferently,such as:ANSIB and are:#60;ISO.FEPA.GB are :F60
£¨2£©JIS R6001and ANSI B74.12 have no the mark of F22 and F40
£¨3£©Only ANSI B74.12 have 240#,others have no 240#
The properties of White Fused Alumina for Abrasive
£¨GB/T 2479-1996£©
Code name |
Range of the Grain Size |
Chemical composition % |
Al 2 O 3 min |
Na 2 O max |
WA |
FA-F80 |
98.50 |
0.50 |
F90-F150 |
98.50 |
0.60 |
F180-F220 |
98.20 |
0.70 |
W63-W14(F230-F600) |
98.00 |
0.80 |
W10-W5(P12-P80) |
97.50 |
0.90 |
WA-B and WA-P |
F12-F80(P12-P80) |
98.50 |
0.60 |
F90-F150(P100-P150) |
98.20 |
0.70 |
F180-F220(P180-P220) |
98.00 |
0.80 |
P240-P800 |
98.00 |
0.80 |
P1000-P1200 |
97.50 |
0.90 |
The sieve analysis of WA Micropowder for Coated Bonded abrasives(Sedimentation tube method)
£¨ISO 9496£º1996.FEPA42GB1984.GB/T2481.2-1998£©
Grain size Mark |
D 3 Maximum (um) |
D 50 Middle (um) |
D 94 Mininum (um) |
F230 |
80 |
53.0 ¡À 3.0 |
34 |
F240 |
70 |
44.5 ¡À 2.0 |
28 |
F280 |
59 |
36.5 ¡À 1.5 |
22 |
F320 |
49 |
29.2 ¡À 1.5 |
16.5 |
F360 |
40 |
22.8 ¡À 1.5 |
12 |
F400 |
32 |
17.3 ¡À 1.0 |
8 |
500 |
25 |
12.8 ¡À 1.0 |
5 |
F600 |
19 |
9.3 ¡À 1.0 |
3 |
F800 |
14 |
6.5 ¡À 1.0 |
2 |
F1000 |
10 |
4.5 ¡À 0.8 |
1 |
F1200 |
7 |
3.0 ¡À 0.5 |
1(80%) |
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