Blog Archive

Wednesday, October 24, 2007

PerlitePerlite Properties and uses

70-75% silicon dioxide: SiO2
12-15% aluminium oxide: Al2O3
3-4% sodium oxide: Na2O
3-5% potassium oxide: K2O
0.5-2% iron oxide: Fe2O3
0.2-0.7% magnesium oxide: MgO
0.5-1.5% calcium oxide: CaO
3-5% loss on ignition (chemical / combined water) Production trends

Vermiculite (Many expanders of perlite are also exfoliating vermiculite and belong to both trade associations)
Diatomite (used for filter-aids)
Industrial minerals
Mortar (firestop)

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