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| Mullite 55 is an
exciting mineral just being launched by Hoben International and is
complementary to its Investagrog Alumino Silicate material. It is
of the highest quality with 46% Alumina and 51% Sillica mineral
content with a low Iron, Potassium and Sodium oxide level. An
exceptionally high quality material, it has a Mullite content of
52% minimum. |
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Up to date Hoben
International has only produced flours for the investment casting
industry, but the new Mullite 55 is available both in flour form
for slurry tanks and also in a comprehensive range of crushed
and graded material produced with an exceptionally low dust
content specifically for the investment casting industry. |
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Physical Analysis |
Chemical Analysis |
|
Mullite |
52% |
Al2O3 |
46.1% |
|
Apparent Porosity |
10.7% |
SiO2 |
51.2% |
|
Hot Expansion rate |
5.9x10-6(0-1000ºC) |
Fe2O3 |
1.4% |
|
Mohs Hardness |
7 - 8 |
TiO2 |
1.3% |
|
pH |
6 - 8 |
K2O+Na2O |
0.3% |
|
P.C.E |
35 min |
CaO+MgO |
0.6% |
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Moisture |
0.035 max |
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Dust Concentration |
230 ppm |
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Free Fe |
440 ppm |
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PARTICLE SIZE
DISTRIBUTION |
|
Size (mm) |
|
1.7 |
1.18 |
0.85 |
0.6 |
0.425 |
0.3 |
0.212 |
0.15 |
0.106 |
0.075 |
|
Mesh BSS |
+10 |
+14 |
+18 |
+25 |
+36 |
+52 |
+70 |
+100 |
+150 |
+200 |
|
0.1-0.3 |
50/150 |
- |
- |
- |
- |
0-1 |
1-10 |
40-70 |
20-50 |
10-30 |
1-10 |
|
0.18-0.3 |
50/80 |
- |
- |
- |
- |
0-1 |
1-10 |
60-90 |
10-30 |
1-10 |
- |
|
0.18-0.5 |
30/80 |
- |
- |
- |
0-1 |
10-30 |
20-50 |
20-40 |
1-10 |
Tr |
- |
|
0.25-0.7 |
22/60 |
- |
- |
Tr |
10-20 |
20-50 |
20-50 |
10-20 |
1-10 |
Tr |
- |
|
0.425-0.85 |
18/36 |
- |
- |
1-10 |
30-60 |
40-60 |
1-10 |
Tr |
- |
- |
- |
|
0.5-1.0 |
16/30 |
- |
0-1 |
20-50 |
20-50 |
10-30 |
1-10 |
Tr |
- |
- |
- |
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Size (mm) |
|
0.106 |
0.075 |
53μ |
45μ |
45μ |
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Mesh BSS |
+150 |
+200 |
+300 |
+325 |
-325 |
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-120 |
-120 |
1-10 |
10-20 |
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20-40 |
40-60 |
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-200 |
-200 |
- |
Tr |
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10-20 |
80-90 |
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