Exfoliated Vermiculite

Exfoliated Vermiculite
Vermiculite

Product Details
Vermiculite is a kind of natural, non-toxic, inorganic silicate mineral, whose raw ore looks like mica. Vermiculite is formed by the hydrothermal alteration or weathering of minerals, usually biotite and phlogopite. When heated, it expands like leech. Vermiculite are divided into raw vermiculite and expanded vermiculite by stages, and according to the color, it can be divided into golden vermiculite, silvery white vermiculite, milky white vermiculite.
Exfoliated Vermiculite

Vermiculite, with layer construction and interlaminar water. It begins expend when it is heated over 200??, becoming the worm-like shape and it can be 15-25times bigger than the original volume, maximum 30 time. when it is rapidly heated to 800??. This forms the material with low density (100-300kg/m), excellent insulation property and good hydroscopicity and ion exchange capacity.

Specification:


Golden Exfoliated VermiculiteSilver Exfoliated Vermiculite
0.3-1mm0.3-1mm
1-3mm1-3mm
2-4mm2-4mm
4-8mm4-8mm
Application
In construction 1. Fireproof board
2. Lightweight concrete
3. Loose fill insulation
4. Construction coating
5. Vermiculite plaster
6. Bitumen coated vermiculite plate
In agriculture 1. Soil improvement
2. Fertilizer carrier
3. Horticulture
4. Hydroponics
5. Animal feed stuffs
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

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In agriculture, vermiculite can be used as soil conditioner. It develops the soil permeability and water content, makes acidic soil change into neutral soil.

Exfoliated vermiculite plays a very good heat insulating effect, making the building warm in winter and cool in summer.
In gardening, vermiculite can be used for flowers, vegetables, fruit cultivation, breeding and other aspects.

In agriculture, vermiculite can be used as soil conditioner. It develops the soil permeability and water content, makes acidic soil change into neutral soil.

Exfoliated vermiculite plays a very good heat insulating effect, making the building warm in winter and cool in summer.
In gardening, vermiculite can be used for flowers, vegetables, fruit cultivation, breeding and other aspects.

General Description:
Vermiculite {(Mg, Fe, Al)3(Al, Si)4O10(OH)2 - 4H2O, Hydrated Magnesium Iron Aluminum Silicate Hydroxide} is an important member of the Montmorillonite/Smectite Group, members of which also belong to the larger general group known as the Clays. Vermiculite is also sometimes placed in the Mica Group, although recent analysis has excluded it from this group. Vermiculite is basically overly hydrated biotite or phlogopite. Natural specimens originated as these minerals and later altered to vermiculite through weathering or hydrothermal processes. Vermiculite typically forms small platy mica like crystals. These crystals contain water in their structures and when heated to above 870C, the water turns into steam causing the crystals to expand rapidly. The volume increase can be 2000 to even 3000%.

Appearance: Flakes or powder

Applications
Vermiculite is very useful for many industrial purposes. It is very lightweight, chemically non-reactive, fire resistant and odorless. Vermiculite can be used to soak up such toxic liquids as fertilizers, herbicides and insecticides. It is this ability that is also being put to good use as a bedding for pets and livestock. In addition, vermiculite can be used in concrete and ceramics as a heat resistant additive.

Important Properties
Vermiculite is usually brown to golden brown, also white, colorless or yellow. Luster is pearly to greasy. Its Crystals are translucent and Crystal System is monoclinic; 2/m. Its Crystal Habits include pseudohexagonal tabular crystals or "books", also found in compact or lamellar masses or microscopic crystals. The Cleavage is perfect in one direction, basal. Fracture is uneven to lamellar. The Hardness is 1.5 (can sometimes leave marks on paper). The Specific Gravity is 2.3 (below average). Its crystals expand to many times their original volume when heated. Best Field Indicators are softness, color, luster and expandability when heated.

Grades

Size Densities Equivalent names/designations
mm in kg/cu m lb/cu ft System A System B
16 5/8 down 56-72 3.5-4.5 NA Premium (6)
8 5/16 down 64-85 4.0-5.0 1 Large (4)
4 5/32 down 72-90 4.5-5.5 2 Medium (3)
2 0.08 down 75-112 4.7-7.0 3 Fine (2)
1 0.04 down 80-144 5.0-9.0 4 Superfine (1)
0.5 0.02 down 90-160 5.6-10.0 5 Micron (0)

In addition to the standard range of vermiculite product above GREAT WALL MINERAL can manufacture vermiculite grades tailored to customers specific requirements.

For more detailed information please contact the expanded vermiculite manufacturer GREAT WALL MINERAL.



Jumbo bags:1 cubic meter, 1.2 metric ton

Vermiculite
Physical properties before expanding:
Appearance:exfoliated,flake or superposed flake.It contains 10,000 slices in the thick of 2.54cm.
Luster:pearl luster,grease luster,no luster,surface dinginess and various luster.
Color:goden yellow,brown,brown and green,dark green,black,variedness and striation white.
Bulk density:2.2-2.8 g/cm3
Hardness:1-1.5
Bulk density:1,100-1,200 kg/m3
Melting point:1,320-1,350 C degree
Intensity of pressure:100-150 Mpa
Moisure:7% Appr.

Physical properties after expanding:

Grade
size (mm)
Bulk density (kg/m3)
water absorption (%)
impurity (g/m3)

1
>4
145
475
<3

2
2.5-4
190
450
<3

3
<2.5
200
420
<4



Primary chemical compositions:


Compositions
SiO2
Al2O3
MgO
Fe2O3
CaO
PH
H2O


Contents:(%)
37-42
9-17
11-23
5-18
0.5-0.8
8-11
<1



Szes of Vermiculite:
Non-expanded standard

types
No.3
No.4
No.5
20 M
32 M
70 M

sizes
3.5-7mm
1.5-3.5mm
<1.5mm
+900ª¦,<3%
+710ª¦,<4%
+250ª¦,<5%



Expanded standard

types
sizes

5 M
<5mm

10 M
<2mm

12 M
<1.5mm

20 M
+900ª¦,<5%

40 M
+450ª¦,<5%

100 M
+150ª¦,<5%

200 M
+75ª¦,<5%

325 M
+45ª¦,<5%

1,250 M
+10ª¦,<10%



Bulk bag or 25 kg plastic bag