AEGEAN PERLITES GREECE, Greek perlite, heat treated, unexpanded, raw, bulk, mineral mixes, hydroponics, construction ore, glassy volcanic rock, mining company
AEGEAN PERLITES GREECE, Greek perlite, heat treated, unexpanded, raw, bulk, mineral mixes, hydroponics, construction ore, glassy volcanic rock, mining company
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AEGEAN PERLITES GREECE, Greek perlite, heat treated, unexpanded, raw, bulk, mineral mixes, hydroponics, construction ore, glassy volcanic rock, mining company

PRODUCTS

Aegean Perlites SA extracts in it's raw form the Perlite ore. Perlite can be described as a glassy, volcanic rock having a pearl-like luster and usually exhibiting numerous concentric cracks resembling an onionskin in appearance.

Owing to its low density with attendant properties of low thermal conductivity and high sound absorption, expanded perlite is used in a variety of industrial and construction applications.

When particles of perlite are heated to a soft consistency, its 2% to 6% combined water vaporized, forming steam that expand each particle into a mass of glass foam.

Chemically, it is essentially a metastable amorphous alumina silicate.

The original volume of the crude perlite may be expanded 4 to 20 times at temperature between 1,400 and 2,000 F. Expanded perlite can be manufactured to weigh as little as 32 kg/m³ making it adaptable for numerous applications.

Uses of Perlite
Uses of perlite can be broken down into three general categories:
construction applications, horticultural applications and industrial applications.


1. Construction applications:

Because of perlite's outstanding insulating characteristics and lightweight, it is widely used as a loose-fill insulation in masonry construction. In this application, free-flowing perlite loose-fill masonry insulation is poured into the cavities of concrete block where it completely fills all cores, crevices, mortar areas and ear holes.

In addition to providing thermal insulation, perlite enhances fire ratings, reduces noise transmission and it is rot, vermin and termite resistant. Perlite is also ideal for insulating low temperature and cryogenic vessels.

When perlite is used as an aggregate in concrete; a lightweight, fire resistant, insulating concrete is produced that is ideal for roof decks and other applications. Perlite can also be used as an aggregate in Portland cement and gypsum plasters for exterior applications and for the fire protection of beams and columns.


Other construction applications include under-floor insulation, chimney linings, paint texturing, gypsum boards, ceiling tiles and roof insulation boards.

2. Horticultural applications:

In horticultural applications, perlite is used throughout the world as a component of soiless growing mixes where it provides aeration and optimum moisture retention for superior plant growth. For rooting cuttings, 100% perlite is used. Studies have shown that outstanding yields are achieved with perlite hydroponics' systems.

Other benefits of horticultural perlite are its neutral pH and the fact that it is sterile and weed-free. In addition, its lightweight makes it ideal for use in container growing. Other horticultural applications for perlite are as a carrier for fertilizer, herbicides and pesticides and for palletizing seed.

Horticultural perlite is as useful to the home gardener as it is to the commercial grower. It is used with equal success in greenhouse growing, landscaping applications and in the home in houseplants.

3. Industrial applications:

Industrial applications for perlite are the most diverse, ranging from high performance fillers for plastics to cement for petroleum, water and geothermal wells.

Other applications include its use as a filter media for pharmaceuticals, food products, chemicals and water for municipal systems and swimming pools. Additional applications include its use as an abrasive in soaps, cleaners and polishes and a variety of foundry applications utilizing perlite's insulating properties and high heat resistance.

This same heat resistant property is taken advantage of when perlite is used in the manufacture of refractory bricks, mortars, and pipe insulation.


Chemical analysis of Perlite
Table 1.1 shows the physical properties of Perlite ore, table 1.2 reflects a specific analysis of our product and table 1.3 shows the screening of the products available for sale:


Table 1.1 - Typical Physical Properties
Color white
Refractive Index 1.5
Free Moisture, Maximum 0.5%
pH (of water slurry) 6.5 - 8.0
Specific Gravity 2.2 - 2.4
Bulk Density (loose weight) 2-25 lb/ft³ range (32-400kg/m³)
Mesh Size Available 4-8 mesh & finer
Softening Point 1600-2000°F (871-1093°C)
Fusion Point 2300-2450°F (1260-1343°C)
Specific Heat 0.2 Btu/lb°F (387 J/kg·K)
Thermal Conductivity at 75°F (24°C) 0.27-0.41 Btu·in/h·ft2·°F(.04-.06 W/m·K)
Solubility: Soluble in hot concentrated alkali and HF Moderately soluble (<10%) in 1N NaOHSlightly soluble (<3%) in mineral acids (1N)Very slightly soluble (<1%) in water or weak acids


Table 1.2 - Typical Elemental Analysis
SiO2 (*)
73.20%
Al2O3
13.50%
K2O
3.90%
Na2O
3.35%
Fe2O3
1.20%
CaO
0.65%
MgO
0.30%
Net Total
96.10%
Combined Water
3.90%
Total
100.00%


Table 1.3 (below)
The three products that are available are:

Fine Perlite: 0.0/0.8

Coarse É Perlite: 0.6/2.5

Coarse II Perlite: 1.0/3.35

Table 1.3 - Screening
Fine
Coarse I
Coarse II
+ 0.8 mm
3% max
+ 2.5 mm
5% max
+ 3.35 mm
15% max
0.6/0.8
10% max
2.0/2.5
17% max
2.38/3.35
50% max
0.3/0.6
30% max
1.18/2.0
50% max
1.7/2.38
15% max
0.15/0.3
30% max
1.0/1.18
10% max
1.18/1.7
10% max
0.075/0.15
15% max
0.8/1.0
8% max
0.8/1.18
5% max
- 0.075
12% max
0.6/0.8
8% max
- 0.8
5% max
-
-
- 0.6
2% max
-
-
Moisture
1% max
Moisture
1% max
Moisture
1% max

 
AEGEAN PERLITES SA
 Head Office:
1 El. Venizelou st, 84100, Syros, Cyclades Islands, Greece

 Administration Office:
9 Kanigos st, 10677,
Athens, Greece

 Exploitation Facilities:
Yali Isle - Nisyros,
Dodecanese Islands, Greece

 Tel. (+30) 210 380-8401

 Fax: (+30) 210 380-8402

 Email:
info@aegean-perlites.com