Brown fused alumina BFA 46# from china with competitive price
Brown fused alumina from china with low price
Brown Fused Alumina is fused in the electric-arc furnace under the high temperature of above 2250°C with high quality bauxite as raw material and matched by the carbon material and scrap iron .Then, it was crushed by autogenous mill, removed the iron through magnetic separation, screened to variety granularity.
Physical performance
|
Size |
46# |
|
Crystals |
Trigonal |
|
Melting point |
2250℃ |
|
highest used temperature |
1900℃ |
|
Bulk density |
1.53-1.99g/cm3 |
|
Specific Gravity |
3.95-3.97g/cm3 |
|
Mohs Hardness |
≥9.0 |
|
Ph Value |
7.0 |
|
Magnetic materials contents |
0.3%max |
|
Coefficient of linear expansion |
7-9(0 – 1600°C) |
|
Refractoriness |
2100℃ |
Chemical composition
|
Grade |
Chemical Composition(%) |
|||
|
Al2O3 |
Fe2O3 |
SiO2 |
TiO2 |
|
|
A |
92-96 |
0.2-1.0 |
1.0-3.0 |
1.5-3.8 |
|
B |
85-90 |
6-10 |
1.5-4 |
2-4 |
|
C |
70-80 |
8-15 |
2-5 |
3-5 |
|
D |
55-65 |
12-20 |
15-25 |
4-6 |
Size distribution
|
Sieve |
% |
|
+600um |
0 |
|
+425um |
≤30 |
|
+355um |
≥40 |
|
+355um+300um |
≥65 |
|
-250um |
<3 |
The usages
- Sandblasting brown corundum
- Freedom grinding - abrasive materials
- Resin Abrasives - Abrasive
- Coated Abrasives
- Corundum functional fillers
- Abrasion resistance ground
- Precision casting
- Refractory material
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