Product descreption
What is perlite?
Perlite is not a trade name but a generic term for naturally occurring siliceous rock.
The distinguishing feature which sets perlite apart from other volcanic glasses is that when heated to a suitable point in its softening range, it expands from four to twenty times its original volume.
CHEMICAL COMPOSITION | |
72 - 76% | SiO2 |
11 - 17% | Al2O3 |
0.5 - 2% | CaO |
0.1 - 0.5% | MgO |
0.5 - 1.5% | Fe2O3 |
4 - 5% | K2O |
3 - 4% | Na2O |
Physical Properties | |
Color | White |
Free moisture | 0.5% |
PH | neutral |
Specific gravity | 2.2 - 2.4 |
Bulk Density | 70 - 120kg/m3 |
Softening Point | 890 - 1100oC |
Fusion Point | 1280 - 1380oC |
Specific Heat | 0.2 |
Agriculture application
The advantages of the expanded perlite
- Improves soil aeration and drainage.
- Makes moisture and nutrients readily available to plants.
- Inorganic and does not deteriorate.
- Serves as an insulator to reduce extreme soil temperature fluctuations.
- Has essentially neutral PH of 6.5 to 7.5.
- It is sterile and free of weeds and disease.
- It is clean, odorless, lightweight.
Because of perlite's outstanding insulation, light weight, fire retardant and sound control characteristics and its being rot, vermin and termite resistant perlite is widely used in the following construction applications.
· Loose fill insulation
· Portland cement and gypsum plasters
· Underfloor insulation
· Concrete roof decks
· Chimney Linings
· Fireproofing
· Blocks
· Pipe insulation
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perlite production process
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