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Perlite


Perlite

 

WHAT IS PERLITE?

Perlite, meaning pearl stone, having a colour range from gray to black, forming naturally during acid-phase of magma, coming into existence in a structure seen by naked eye or microscope after lava cooling and lava breaking, having water dews in its mass, is a name given to siliceous, glassy, volcanic  rocks.

The most important feature of perlite, distinguishing it from other volcanic glassy rocks, is its ability to expand up to twenty-four (24) times of its original volume when it is heated around expansion temperature.

 Expansion of perlite depends upon combined water (crystallization water) rate inside ore perlite which is about 2-4%.

When perlite is quickly heated to above 870°C, ore perlite pops like popcorn as combined water in perlite vaporizes.

Countless pinholes form on perlite expanding with heat.

The output, expanded perlite, is an excellent heat and sound insulation material.

 

CHEMICAL AND PHYSICAL FEATURES OF ORE PERLITE :

 

CHEMİCAL AND PHYSİCAL FEATURES OF ORE PERLİTE :

Colour : Grey, tones of grey and black

Softening : 870°C - 1100°C

Fusion point: 1310°C- 1380°C

Ph : 6,5 - 8,0

Bulk density : 1,2 – 1,3 gr/cm³

Weight loss : 0,5 %

 

Fusion property: It fuses little in hot concentrate alkaline and % 2 concentrate acids ; it fuses very little in %1 dilute mineral and  concentrate weak acids

Perlite can be produced 2000-2100 kg/m³ density as ore perlite; it can be produced 2200-2400 kg/m³ density as crushed-screened perlite; it can be produced between 32 kg/m³ and 180kg/m³ density as expanded perlite

Expanded perlite is used for heat and sound insulation, for coating in buildings, for roofing and it is used between floors of the building,

 

Perlite is used in agriculture, in greenhouse cultivation, in manufacture of refractory material,

Perlite expanding between 32 kg/m³-60 kg/m³ and grinded is used as filtre material in industry.