agriculture vermiculite
expended and unexpended
silver and gold
0.3-1mm 1-2mm 2-4mm 4-8mm etc
SGS passed
Features:
Fireproof, heat insulating, sound and moisture absorbing, light weight, non-toxic, odorless, non-abrasive, etc..
Ypical chemical analysis:
element | Percent by weight (%) |
SiO2 | 37-42 |
Al2O3 | 9-17 |
MgO | 11-23 |
CaO | 1-2 |
K2O | 5-8 |
Fe2O3 | 3.5-18 |
H2O | 7-18 |
Typical chemical formula:
(Mg, Ca, K, Fe11)3(Si, Al, Fe111)4O10(OH)2O4H2O
Typical physical properties:
Density | 220-270kg/m3 |
Porosity | 1100-1200kg/m3 |
Hardness | 1-1.5 |
Melting point | 1320-1370 |
Compressive ressitance | 100-150mpa |
Index of refraction | Ng=1.525-1.561 Ng=1.545-1.581 |
Moisture content | 7% |
Moisture absorbency | <2% |
Applications:
construction | 1. fireproof board |
| 2. loose fill insulation |
| 3. construction coating |
| 4. lightweight concrete |
| 5. vermiculite plaster |
industry | 1. thermal insulation, refractory |
| 2. sound absorption loose filling |
| 3. friction linings |
| 4 gaskets or seals |
| 5. packing materials |
agriculture | 1. horticulture |
| 2. soil improvement |
| 3. fertilizer carrier |
| 4. hydroponics |
| 5. animal feedstuffs |