Vermiculite
In color,vermiculite can be indevided into silver vermicultie and golden vermiculite
Expansion ratios:5.5-10times
1. vermiculite production
Vermiculite, chemical formula M g × (H2O) [Mg3 × (AlSiO3O10) (H2O)], is a magnesium water inclouded aluminum silicate secondary metamorphic minerals of layered structure. It likes mica in form, and usually come from weathered or hydrothermal alterated black (gold ) Mica. It will present a deflection shape after heat expansion and water loss, liking a leech pattern in form , so it gets the name vermiculite.
2.Vermiculite kinds
1)Crude vermiculite/raw vermiculite/unexpanded vermiculite
2)Expanded vermiculite/exfoliated vermiculite
3.Vermiculite size
Crude golden vermiculite | 0-30um,0.3-0.65mm,0.65-1mm 20-40mesh,10-40mesh, ,0.3-1mm,0.5-1.5mm,1.5-2.5mm,1-2mm,2-4mm,3-8mm,4-8mm, |
Crude silver vermiculite | 0.3-1mm,1-2mm,2-4mm3-6mm,4-8mm |
Exfoliated golden vermiculite | 0.3-0.65mm,0.65-1mm,1-2mm 2-4mm,1-3mm,0.3-1mm,3-6mm,4-8mm100mesh150mesh 200mesh 325mesh |
Exfoliated silver vermiculite | 0.3-1mm1-3mm2-4mm3-6mm4-8mm100mesh 150mesh200mesh325mesh |
Special size ,we can do as per client's demands
4.Vermiculite specifications
Origin of golden vermiculite | Hebei,China | Origin of silver vermiculite | Xinjiang,China |
Melting point | 1320°C-1370°C | Asbestos | None |
Compressive resistance | 100-150 Mpa | Thermal Conductivity | 0.045 - 0.069w/m °C Under ambient conditions |
Hardness | 1-1.5 | PH | 7-11 |
Solubility | Insolubility (most liquid ) | Combustibility | Non-combustible |
Reactivity | Non reactive (except in very stong acids) | Corrosion resistance | Alkali-resistant |
5.Vermiculite chemicals
Composition | SiO2 | MgO | Al2O3 | Fe2O3 | CaO | K2O | ph |
Percentage | 37-42 | 11-23 | 9-17 | 3.5-18 | 1-2 | 5-8 | 7-11 |
The chemical analysis of both crude and exfoliated vermiculite is the same.
6.Applications
Crude Vermiculite is widely used for Foundary Insulation and Steel Industry
Exfoliated vermiculite is used in various industries as a packing material due to its highly absorbent nature. It is also a lightweight aggregator for plaster, proprietary concrete, compounds, fire stop mortar and cementious spray fireproofing. It can also be used as loose fill insulation and can be molded into shapes, bonded with cement and other bonding materials for insulation, refractory insulation, fireproofing of structural steel and pipes industries. Exfoliated vermiculite is also widely used as a component of the interior fill for fire stop pillows, and is also used in commercial hand warmers. Vermiculite is used for Horticulture :lawn of golf,seed preservation agent,soil conditioner ,wetting agent,plant growth substance,feed additive ,any other applications
7.Price is negotiated as per vermiculite specification ,quality ,quantities client demands
