Vermiculite
Vermiculite is a layer-structured metamorphic rock of gibbsite silicate. Rich in magnesium, it comes from hot-liquid-eroded or weathered phlogopite. When it is heated to lose water and expands, lt turns curvingas a leech. Therefore is called vermiculite.lt can be divide into original vermiculite and expanded vermiculite. color it can also be divided into golden vermiculite and white vermiculite.
Chemical Properties
Molecular
formula |
SiO2
|
MgO
|
AI2O3
|
Fe2O3
|
FeO
|
K2O
|
H2O
|
CaO
|
PH
|
Loss in buring 800°C/Hour
|
Name
|
Silicon
dioxide
|
Magnesium
oxide
|
Aluminium
trioxide
|
Iron
trioxide
|
Irnon
oxide
|
Potassium
oxide
|
Hydrogen
oxide
|
Calcium
oxide
|
PH
|
4.5-7.5
|
Content%
|
37-42
|
11-23
|
9-17
|
3.5-18
|
1-3
|
5-8
|
7-18
|
1-2
|
7-8
|
Application :
● In Refractory products
Common mixing vermiculite can be used to steel mills,boilers,vermiculite fire board for walls,security doors,fire on the ship,fire retardant paint,paint the tunnel fire.
● In Agriculture and Horticulture
Can be used to Improve soil,often with peat,perlite as organic fertilizer,retain moisture,keep the soil permeability,improve fertilizer for release action
● In Feeding Additive
Vermiculite commonly used in many nutrients carriers,formulations,such as concentration of fat,vitamins,honey,preservatives,antioxidants and the like have a large number of applications.
● In Friction and Sealing Material
Vermiculite also widely used in friction and sealing material,such as Brake Pads and Brake Linings.Adding vermiculite can prevent high-temperature heat recession,improve product strength,reduce noise,reduce the weight and cost of the product.
●In Package Materials
Vermiculite now widely used in hazardous chemical liquids,chemicals flowing liquid,seafood,water silkworm,fruits,bulbs,plant moss base block storage packaging,swimming pool,from soft,abrasion resistance,thermal insulation against the cold effect.