Vermiculite is a member of the phyllosilicate group of minerals, resembling mica in appearance. It is found in various parts of the world, vermiculite is basically a hydrated phlogopite mica which has the remarkable ability to expand to many times than its original volume when heated at 850 °C.Vermiculite is most widely used in its exfoliated form. The concertina-shaped granules of exfoliated vermiculite are non-combustible as well as being insoluble in water and all organic solvents. 

Golden vermiculite 

Chemical components

Chemical Composition SiO2 Al2O3 MgO CaO PH Fe2O3 Impurity

(%) 41 18 21 0.8 7-10 3.5 < 3

Silvery vermiculite

Chemical components

Chemical Composition SiO2 AL2O3 AL2O3 MgO CaO FeO Fe2O3 TiO2

(%) 41.2 12.68 24.22 0.96 1.54 4.06 1.33

Chemical Composition K2O P2O5 H2O Na2O MnO Impurity L.O.I

(%) 5.97 0.06 3 1.6 0.043 < 5 6.71

Size: 0.3-1mm/1-2mm/2-4mm or other sizes customers required.

◆Expanded vermiculite

Size Density 

(Kg/M3) Water Absorption

（%） Thermal Conductivity 

(k/m2/h/℃) Impurity

（%）

8mm Above 70-110 480 0.045 ≤3

4-8mm 70-110 480 0.045 ≤3

3-5mm 80-120 465 0.045 ≤3

1-3mm 80-150 430 0.045 ≤3

20-40mesh 100-160 410 0.045-0.055 ≤2

40-70mesh 100-170 410 0.045-0.055 ≤2

70-100mesh 100-170 400 0.045-0.055 ≤2

150mesh 100-180 410 0.045-0.055 ≤1

200mesh 100-180 410 0.045-0.055 ≤1

325mesh 100-180 400 0.045-0.055 ≤1

Blended Grade 90-180 430 0.045-0.055 ≤3

Size:0.3-1mm/1-2mm/1.5-3.5mm/2-4mm/3.5-7mm/4-8mm/20-40mesh/70-100mesh/32

5mesh or as per customers'request.

Color:Silver, Golden

Horticulture Vermiculite: 1-2mm, 2-4mm

Expanded Vermiculite: 0-1mm, 1-3mm, 2-4mm

Insulation Vermiculite:0-1mm, 0-2mm, 0-3mm

The size should be adjusted according to the client's demand.

Expanded Vermiculite's Properties: Fireproof, heat insulating, sound and moisture absoring, light weight, non-toxic, ordorless, non-abrasive ect.

Application:

● Lightweight concrete and plaster.

● Lightweight vermiculite board.

● Lightweight aggregate and molded cement board.

● Horticultural soil conditioner.

● Fireprood door's inner stuffing.