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Vermiculite Products
TYPICAL CHEMICAL ANALYSIS
kalibar Vermiculite Mine
|
SiO2 |
Al2O3 |
MgO |
Fe2O3 |
CaO |
K2O |
Na2O |
TiO2 |
BaO |
MnO |
LOI |
Tot |
| 33.9 |
15.7 |
14.8 |
12.9 |
5.7 |
0.97 |
0.16 |
0.12 |
0.02 |
0.03 |
14.9 |
99.20 |
Urmia Vermiculite Mine
|
SiO2 |
Al2O3 |
MgO |
Fe2O3 |
CaO |
K2O |
H2O |
TiO2 |
BaO |
MnO |
LOI |
Tot |
| 38-46 |
10-16 |
16-35 |
6-13 |
1-5 |
1-6 |
0.8-16 |
1-3 |
0.02 |
0.03 |
14.9 |
99.20 |
TYPICAL CHEMICAL
FORMULA
(Mg,Ca,K,Fe11)3(Si,AL,Fe111)4O10(OH)2O4H2O
TYPICAL PHYSICAL
PROPERTIES
|
Color |
Gold-Brown |
|
Free Moisture, Maximum |
0.5% |
|
pH (of water slurry) |
7.0-9.5 |
|
Specific Gravity |
2.5 |
|
Expanded Bulk
Density |
4-10 lb/ft3 |
|
Mesh Sizes (normal) |
2-40 mesh and finer |
|
Fusion Point |
2200-2400F |
|
Specific Heat |
1.08 kJ/kg.K |
|
Thermal Conductivity |
27-.41 BTU.in/h.ft2.F |
TECHNICAL DATA OF VERMICULITE
Vermiculite is most widely used used in its exfoliated form. The
concertina-shaped granules of exfoliated vermiculite are non-combustible as well
as being insoluble in water and all organic solvents. Completely safe and easy
to handle, exfoliated vermiculite is available in six different grades as shown
in the table below.
Volume Yields for Exfoliated Vermiculite
The typical loose bulk densities produced in the following table are
realistic values. These values will vary slightly depending on the type of
furnace used, the efficiency of the vermiculite handling system and on the feed
rate of the crude vermiculite into the furnace.
| Grade
1 |
Typical loose bulk
densities
of product (kg/m3) |
Expanded Lbs/ft3
|
| Micron |
95 - 163 |
5.9 - 10.2 |
| Superfine |
80 - 163 |
5.0 - 10.2 |
| Fine |
75 - 133 |
4.6 - 8.3 |
| Medium |
72 - 105 |
4.5 - 6.6 |
| Large |
64 - 93 |
4.0 - 5.8 |
PH Value: 9 - 9.5
|
Grade 2 |
Particle size
distribution
mm 75% retained (mm) |
Loose Bulk density
(kg/m3)* |
Lbs/ft3 |
|
PREMIUM |
-16.0 + 5.6 |
600 - 800 |
39.2 |
|
LARGE |
-8.0 + 2.8 |
750 - 850 |
43.6 |
|
MEDIUM |
-4.0 + 1.4 |
880 - 1000 |
46.7 |
|
FINE |
-2.0 + 0.710 |
890 - 1000 |
54.6 |
|
SUPERFINE |
-1.0 + 0.355 |
925 - 1050 |
57.3 |
|
MICRON |
-0.710 + 0.250 |
925 - 1050 |
59.3 |
| * With compaction in storage or
transit this can increase to 1150 kg/m3 |
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