Brown fused alumina P220# for coated abrasive paper
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
P8 - P220 Abrasive Grain Sizes P-size Brown Fused Alumina
|
Size
|
36#
|
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
Abrasive Blast Media Brown Aluminum Oxide F36
|
Sieve
|
%
|
+850um
|
0
|
+600um
|
≤25
|
+500um
|
≥45
|
+500um+425um
|
≥65
|
-355um
|
<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
|
the usage
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