About perlite

Perlite is generic name for aluminosilicate material of volcanic origin. Raw perlite in nature is found in rock shape. Depending on deposit perlite chemical composition varies.

Preparation of expanded perlite

Chemical composition of Perlite :

SiO2 72 - 78 %

Al2O3 12 - 14 %

Fe2O3 0.5 - 2 %

CaO 1 - 3 %

MgO 1 - 3 %

Na2O 1 - 3 %

K2O 1 - 3 %

Raw perlite contains 2 - 5% crystal water. After grinding of ore perlite is exposed to temperatures around 1000 ° C. On this temperature process of expanding occurs and perlite increases volume 20-40 times. Bounded water evaporates and creates numerous bobbles inside they ensure its extraordinary characteristics, porous structure, low weight and wight color. Thus characteristics separate perlite from other volcanic rocks and make perlite irreplaceable in applications :

- ecologically clean ;

- microbiologically sterile ;

- chemically inactive ;

- pH neutral.