agricultural grade vermiculite

Vermiculite Introduction of Vermiculite 1. Features: fireproof, heat insulating, sound and moisture absorbing, non-toxic, lightweight, antibiosis
2. A mineraloid of hydrated laminar magnesium-aluminum- iron silicate. 
3. Chemical formation: (Mg,Fe,Al)3(Al,Si)4O10(OH)2•4H2O.   Types of Vermiculite  

Golden raw vermiculite	Golden exfoliated vermiculite	Silver raw vermiculite	Silver exfoliated vermiculite
0.3-1mm	0.3-1mm	0.3-1mm	0.3-1mm
1.5-2.5mm	1-3mm	1-2mm	1-3mm
2.5-6mm	2-4mm	2-4mm	2-4mm
3-8mm	4-8mm	4-8mm	4-8mm

 

Other specification: 20-40mesh,60mesh,80mesh,100mesh,325mesh etc

Application of Vermiculite  

In Industry	1. Gaskets or Seals 2. Fireproofing 3. Insulation in steelworks and foundries 4. Packing Materials 5. Friction Linings 6. Refractory products 7. Processed vermiculite
In Agriculture	1. Soil Improvement 2. Fertilizer Carrier 3. Horticulture 4. Hydroponics   5. Animal Feedstuffs
In Construction	1. Fireproof Board   2. Loose fill Insulation  3. Construction Coatings  4. Lightweight Concretes 5.Vermiculite Plasters 6. Bitumen coated vermiculite plates

  Property of Vermiculite  

PH	7
Asbestos	Free asbestos
Tensile strength	1,000-1,500kgs/CM2
Hardness	1-1.8
Thermal Conductivity	0.047-0.081 W/(M.K)
Fire-proof	1300-1350 ℃
Operating temperature	900-1000 ℃
Water-absorbing	above 200 % by weight, 37% by volume
Moisture absorbing	1-2 %
Anti-freezing	For 15 cycles of freezing and thawing, Particle with no any change at-20℃
Sound       absorbing	60-90%
Corrosion resisting	Alkali-resisting

  Specification of Silver Raw Vermiculite  

Size	Density	Specification	Moisture	Expansion Rate
0.3-1 mm	0.8-1.0 g/cm3	85% min	3% max	6.5 Times min
1-2 mm	0.8-1.0 g/cm3	85% min	3% max	7.5 Times min
2-4 mm	0.8-1.0 g/cm3	85% min	3% max	7.5 Times min
4-8 mm	0.8-1.0 g/cm3	85% min	3% max	7.5 Times min

  Chemical Composition of Vermiculite  

	ELEMEMT	SiO2	Al2O3	Fe2O3	CaO	MgO	TiO2	K2O
Silver Vermiculite	CONTENT%	37.56	11.85	5.15	1.51	22.44	1.05	6.39

   

	ELEMEMT	SiO2	Al2O3	Fe2O3	CaO	MgO	TiO2	K2O
Golden Vermiculite	CONTENT%	43.75	15.55	15.8	1.32	8.98	1.67	5.19