• 0086-311-85860330
  • Welcome to visit us.Looking forward to the cooperation with you!

Vermiculite

  Introduction of Vermiculite



    1.Features: fireproof, heat insulating, sound and moisture absorbing, non-toxic, lightweight, antibiosis.


    2.2.A  mineraloid of hydrated laminar magnesium-aluminum- iron silicate.


    3.Chemical formation: (Mg,Fe,Al)3(Al,Si)4O10(OH)2·4H2O.


DETAILED INTRODUCTION

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

26.5-40.6 %

Moisture absorbing

≯2 %

Anti-freezing

For 15 cycles of freezing and thawing, Particle with no any change at-20℃

Sound absorbing

0.53-0.63

Corrosion resisting

Alkali-resisting


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


Specification of 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


Silver Vermiculite

ELEMEMT

SiO2

Al2O3

Fe2O3

CaO

MgO

TiO2

K2O

CONTENT%

37.56

11.85

5.15

1.51

22.44

1.05

6.39

Golden Vermiculite

ELEMEMT

SiO2

Al2O3

Fe2O3

CaO

MgO

TiO2

K2O

CONTENT%

43.75

15.55

15.8

1.32

8.98

1.67

5.19

APPLICATION

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