Vermiculite is a hydrous phyllosilicate, natural, inorganic and non-toxic mineral, under the action of high temperature will expanded 7-10 times from its original size. Exfoliation occurs when the mineral is heated sufficiently.
Formula: (Mg,Fe2+,Fe3+)3[(Al,Si)4O10](OH)2·4H2O
Raw vermiculite will be expanded to many times when heated at 850-1100 °C, poison less, odorless , corrosion-resistant, Non-combustible , natural refractory properties , good thermal insulation , low density.
Crude Golden Vermiculite Ore 1-2mm, 2-4mm:
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Golden Vermiculite Ore 1-2mm
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Golden Vermiculite Ore 1-2mm
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Golden Vermiculite Ore 1-2mm
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Golden Vermiculite 2-4mm
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Golden Vermiculite 2-4mm
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Golden Vermiculite 2-4mm
Crude Silver Vermiculite Ore 1-2mm, 2-4mm:
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Silver Vermiculite Ore 1-2mm
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Silver Vermiculite Ore 1-2mm
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Silver Vermiculite Ore 1-2mm
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Silver Vermiculite Ore 2-4mm
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Silver Vermiculite Ore 2-4mm
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Silver Vermiculite Ore 2-4mm
Natural Properties of Vermiculite:
- Ultra Light weight (low specific weight)
- Chemically inert
- Odorless
- Thermal insulation
- Environmentally friendly
- Sound proofing
- Easy to use
- Non – flammable
- Neutral PH
- Sterile, free of weeds, bacteria and pathogens
Chemical Properties:
|
MF |
CONTENTS % |
|
SiO2 |
38-48 |
|
MgO |
11-23 |
| Al2O3 |
16-35 |
| Fe2O3 |
6-13 |
|
FeO |
1-3 |
|
K2O |
2-8 |
|
H2O |
6-13 |
| CaO |
1-4 |
| PH |
5-8 |
Physical Properties:
|
Item |
Specifications | Item |
Specification |
| Expansion ratios |
5.5-11times |
Bulk density of expanded vermiculite |
90-270kgs/m3 |
| Thermal Conductivity |
0.045 – 0.069w/m °C Under ambient conditions |
asbestos |
None |
| Hardness |
1-1.5 |
Compressive resistance |
100-150 Mpa |
|
Melting point |
1320°C-1370°C |
Corrosion resistance |
Alkali-resistant |
Applications of Vermiculite:
Industry: Filtration, Brake pad and brake shoes, paints, fixation of hazardous material, gaskets or seals, sound absorption loose filling, thermal insulation refractory, friction linings, packing material, drilling muds.
Horticulture: Seed germination, root cutting, blocking mixes, hydroponics, micro-propagation, sowing composts, potting mixes.
Agriculture: Fertilizer, animal feed, anti-cacking material, bulking agent, seed encapsulant, soil conditioner, pesticides
Construction: Fireproof board, gypsum plaster, sound absorption loose filling, air setting binder, construction coating, loft insulation, light-weight concrete, vermiculite screeds.