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Perlite ore is a naturally occurring volcanic glass that, when heated, expands to many times its original volume. This unique property makes it an excellent lightweight aggregate for various applications. Perlite is primarily composed of silica, alumina, and other minerals, and is processed by heating it to temperatures around 1,600┬░F (870┬░C), causing it to pop and expand into a porous material.
| Chemical composition | Silica (SiO2) 70-75%, Alumina (Al2O3) 12-15%, Iron Oxide (Fe2O3) 1-3% |
| Expansion ratio | 4 to 20 times its original volume |
| Moisture content | Typically less than 2% |
| Density | Lightweight, typically 2 to 15 lbs/ft┬│ after expansion |
| Color | White to light gray |
When selecting perlite ore, consider the intended application to determine the required expansion ratio and density. Specify the desired chemical composition, particularly the silica and alumina content, to ensure suitability for your project. Additionally, inquire about moisture content and any necessary certifications for specific uses, such as horticultural or industrial applications.
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Perlite ore is used in construction, horticulture, and as an insulator due to its lightweight and insulating properties.
Perlite is processed by heating it to high temperatures, causing it to expand and become a lightweight aggregate.
Yes, perlite is a natural volcanic material and is considered environmentally friendly.
Yes, perlite is commonly used in potting mixes to improve aeration and drainage.
Perlite provides lightweight insulation, reduces weight in concrete, and improves fire resistance.
A higher expansion ratio typically results in better insulation and lightweight properties.