Vermiculite is a neutral and clean minerals , comes from the black mica through air-slake or hydrothermal alteration,which exfoliated(expanded) ,when rapidly heated above 1000°C.
The exfoliated vermiculite like a leech and become several times bigger that its original crude vermiculite.
Raw silvery vermiculite color:silver-grey
GRADE AND PARTICLE SIZE:
GRADE | Particle size distribution min. 80% retained (mm) |
LARGE | -8.0 + 2.8 |
MEDIUM | -4.0 + 1.4 |
FINE | -2.0 + 0.71 |
SUPERFINE | -1.0 + 0.355 |
MICRON | -0.710 + 0.25 |
Chemical properties:
SiO2 | 37-42% |
Al2O3 | 9-17% |
Fe2O3 | 3.5-18% |
MgO | 11-23% |
K2O | 5-8% |
CaO | 1-2% |
Packaging & Shipping
Jumbo bag ,1ton/bag 1.2tons/bag ,or as per customer's demands