Vermiculite is a natural mineral that expands with the application of heat. The expansion process is called exfoliation and it is routinely accomplished in purpose-designed commercial furnaces. Vermiculite is formed by weathering or hydrothermal alteration of biotite or phlogopite.
Silvery vermiculite Ore
|
Composition |
SiO2 |
AL2O3 |
MgO |
CaO |
FeO |
Fe2O3 |
TiO2 |
|
Content (%) |
41.2 |
12.68 |
24.22 |
0.96 |
1.54 |
4.06 |
1.33 |
|
Composition |
K2O |
P2O5 |
H2O |
Na2O |
MnO |
Impurity |
L.O.I. |
|
Content (%) |
5.97 |
0.06 |
3 |
1.6 |
0.043 |
< 5 |
6.71 |
|
Size |
Density (Kg/M3) |
Water Absorption(%) |
Thermal Conductivity (k·m2·h·℃) |
Impurity(%) |
|
8mm Above |
70-110 |
480 |
0.045 |
≤3 |
|
4-8mm |
70-110 |
480 |
0.045 |
≤3 |
|
3-5mm |
80-120 |
465 |
0.045 |
≤3 |
|
1-3mm |
80-150 |
430 |
0.045 |
≤3 |
|
20-40mesh |
100-160 |
410 |
0.045-0.055 |
≤2 |
|
40-70mesh |
100-170 |
410 |
0.045-0.055 |
≤2 |
|
70-100mesh |
100-170 |
400 |
0.045-0.055 |
≤2 |
|
150mesh |
100-18 |
400 |
0.045-0.055 |
≤1 |
|
200mesh |
100-180 |
400 |
0.045-0.055 |
≤1 |
|
325mesh |
100-180 |
400 |
0.045-0.055 |
≤1 |
|
Blended Grade |
90-180 |
430 |
0.045-0.055 |
≤3 |
