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Brown Fused Alumina
Product Code: Brown Fused Alumina
Availability: In Stock
Price: Rs.0.00This product has a minimum quantity of 25Available Options
* Price & Delivery Terms:
* Product Origin:
* CIF DELIVERY:
Tags: Refractory, DBM, Magnesite, Calcined Alumina, Aluminum Hydrate, Hydroxide, Aluminate, monolithic, Bricks, acidic, ramming mass, mortars Calcined Alumina (Metallurgical), Rotary Kiln Bauxite, Fused Alumina, Calcined Alumina, and Tabular Alumina, Nepheline Syenite, Dead Burned Magnesite, Calcined Magnesite, olivine, magnesia, kaolin, ground silica etc.Brown Fused Alumina
Chemical & Physical Properties
Crystal Form
Alpha Alumina Trigonal System
Chemical Nature
Amphoteric
Reaction with Acids
Subject to mild attack by aqua and/or hydrofluoric acid
Reaction with Alkalis
Very slight with strong hot solution only
Oxidation-reduction effects
None
True Density(g/cm3)
3.97
Hardness
Knoop(kg/cm2)
2000-2200
Moh’s
9.0
Color
Dark Brown
Color After Firing
Light Blue
Melting Point
2000 °C
Max. Usable Temperature
1900 °C
Specific Heat (cal/g °C)
0.26 (20-29 °C)
Coefficient of thermal conductivity
(cal/cm2.sec.°C)
Room Temperature
900 °C
0.047
0.013
Electrical resistivity (Wcm)
30 °C
300 °C
900 °C
1600 °C
1016
1013
105
104
Coefficient of liner expansion (x10-6)
7-9(0-1600°C)
Chemical Composition (% by weight)
Grit Item
10 – 90
100 – 180
220-220
230 – 400
500 -1200
Al2O3
94.5 – 97.0
9305 Min.
92.5 Min.
91.0 Min.
89.0 Min.
TiO2
1.5 – 3.8
1.5 – 3.8
1.5 -3.8
4.0 Max
4.0 Max
Magnetic Matters Contents (% by weight)
Grit No.
Magnetic Matters Content
16#-30
<0.0380
36#-60#
<0.0280
70-120#
<0.0230
150#-220#
<0.0170
Grit No.
Micron
Grit No.
Micron
Grit No.
Micron
10
2360 ~ 2000
30
710 ~ 600
60
212 ~ 180
12
2000 ~ 1700
36
600 ~ 500
90
180 ~ 150
14
1700 ~ 1400
40
500 ~ 425
100
150 ~ 125
16
1400 ~ 1180
46
425 ~ 355
120
125 ~ 106
20
1180 ~ 1000
54
355 ~ 300
150
106 ~ 75
22
1000 ~ 850
60
300 ~ 250
180
90 ~ 63
22
850 ~ 710
70
250 ~ 212
220
75 ~ 53
Available micron powder sizes
China GB
2477-83
JIS
FEPA(84) / DIN(70)
SO(77)
Grit No.
Norminal
size range
(μm)
Grit No.
ds50 value
(μm)
Grit No.
ds50 value (μm)
Grit No.
ds50
value (μm
Standard
werte
der Mikro-
F-Reihe
Sedigraph
5000D
240
60.0±4.0
P240
58.5±2.0
280
52.0±3.0
P280
52.2±2.0
W63
63 - 50
320
46.0±2.5
F230/53
53±3.0
50.0±3.0
P320
46.2±1.5
W50
50 - 40
360
40.0±2.0
F240/45
44.5±2.0
42.0±2.0
P360
40.5±1.5
400
34.0±2.0
P400
35.0±1.5
W40
40 - 28
500
28.0±2.0
F280/37
36.5±1.5
34.5±1.5
P500
30.2±1.5
600
24.0±1.5
F320/29
29.2±1.5
27.7±1.5
P600
25.8±1.0
W28
38 - 20
700
21.0±1.3
F360/23
22.8±1.5
21.6±1.5
P700
21.8±1.0
Terms & Conditions
1. Prices will be quoted as per Enquiry.
2. Delivery immediate from factory after confirmation of Purchase Order and Payment.
3. Packing 1 MT Jumbo Bag.
4. Delivery on CIF or FOB Basis.
5. Payment Terms is 100% TT or 100% LC at Sight.
6. Others Can be discussed.
Brown Fused Alumina
Brown Fused Alumina (BFA) is produced by a reduction fusion of high quality bauxites in electric arc furnaces. It is both a hard and tough material with high strength, making it an excellent abrasive grain for applications such as grinding wheels, sandpaper, blasting media, metal preparation, lapping, polishing, and grinding. Its thermal properties make it an excellent raw material for refractory applications.
Chemical & Physical Properties
Crystal Form
Alpha Alumina Trigonal System
Chemical Nature
Amphoteric
Reaction with Acids
Subject to mild attack by aqua and/or hydrofluoric acid
Reaction with Alkalis
Very slight with strong hot solution only
Oxidation-reduction effects
None
True Density(g/cm3)
3.97
Hardness
Knoop(kg/cm2)
2000-2200
Moh’s
9.0
Color
Dark Brown
Color After Firing
Light Blue
Melting Point
2000 °C
Max. Usable Temperature
1900 °C
Specific Heat (cal/g °C)
0.26 (20-29 °C)
Coefficient of thermal conductivity
(cal/cm2.sec.°C)
Room Temperature
900 °C
0.047
0.013
Electrical resistivity (Wcm)
30 °C
300 °C
900 °C
1600 °C
1016
1013
105
104
Coefficient of liner expansion (x10-6)
7-9(0-1600°C)
Chemical Composition (% by weight)
Grit Item
10 – 90
100 – 180
220-220
230 – 400
500 -1200
Al2O3
94.5 – 97.0
9305 Min.
92.5 Min.
91.0 Min.
89.0 Min.
TiO2
1.5 – 3.8
1.5 – 3.8
1.5 -3.8
4.0 Max
4.0 Max
Magnetic Matters Contents (% by weight)
Grit No.
Magnetic Matters Content
16#-30
<0.0380
36#-60#
<0.0280
70-120#
<0.0230
150#-220#
<0.0170
Grit No.
Micron
Grit No.
Micron
Grit No.
Micron
10
2360 ~ 2000
30
710 ~ 600
60
212 ~ 180
12
2000 ~ 1700
36
600 ~ 500
90
180 ~ 150
14
1700 ~ 1400
40
500 ~ 425
100
150 ~ 125
16
1400 ~ 1180
46
425 ~ 355
120
125 ~ 106
20
1180 ~ 1000
54
355 ~ 300
150
106 ~ 75
22
1000 ~ 850
60
300 ~ 250
180
90 ~ 63
22
850 ~ 710
70
250 ~ 212
220
75 ~ 53
Available micron powder sizes
China GB
2477-83
JIS
FEPA(84) / DIN(70)
SO(77)
Grit No.
Norminal
size range
(μm)
Grit No.
ds50 value
(μm)
Grit No.
ds50 value (μm)
Grit No.
ds50
value (μm
Standard
werte
der Mikro-
F-Reihe
Sedigraph
5000D
240
60.0±4.0
P240
58.5±2.0
280
52.0±3.0
P280
52.2±2.0
W63
63 - 50
320
46.0±2.5
F230/53
53±3.0
50.0±3.0
P320
46.2±1.5
W50
50 - 40
360
40.0±2.0
F240/45
44.5±2.0
42.0±2.0
P360
40.5±1.5
400
34.0±2.0
P400
35.0±1.5
W40
40 - 28
500
28.0±2.0
F280/37
36.5±1.5
34.5±1.5
P500
30.2±1.5
600
24.0±1.5
F320/29
29.2±1.5
27.7±1.5
P600
25.8±1.0
W28
38 - 20
700
21.0±1.3
F360/23
22.8±1.5
21.6±1.5
P700
21.8±1.0
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