Vermiculite is a member of the phyllosilicate group of minerals, resembling mica in appearance. It is found in various parts of the world, vermiculite is basically a hydrated phlogopite mica which has the remarkable ability to expand to many times its original volume when heated at 850 -1100°C.
Crude vermiculite consists of golden and silver vermiculite which are carefully classified into many sizes ,includes0.3-1mm1.5-2.5mm0.5-1.41mm1-2mm2-4mm3-6mm4-8mm.
Exfoliated Vermiculite
The exfoliation process is carried out commercially by passing crude vermiculite through a furnace chamber in a controlled manner. The crude vermiculite then expands at right angles to the cleavage planes, producing concertina-shaped particles many times their original volume.Exfoliated vermiculite size ,includes 0.3-1mm1-3mm1-2mm2-4mm2-3mm
3-5mm3-6mm4-8mm6-8mm,special size can be done as per customer’s demands .
1.Expanded vermiculite powder features
Heat-resistant, corrosion-resistant, well-ventilation, water preservation, poisonless, odorless, low hardness, burning-avoidness, lightweight .non-asbestos ,Low density etc
2.Expanded vermiculite powder size :
20-40mesh40-60mesh 60-80mesh 100mesh 150mesh 200mesh 325mesh 400mesh ect
Special size is supplier as client’s demands
3.Expanded vermicultie powder chemicals
Composition | SiO2 | MgO | Al2O3 | Fe2O3 | CaO | K2O | ph |
Percentage | 37-42 | 11-23 | 9-17 | 3.5-18 | 1-2 | 5-8 | 7-11 |
4.Expanded vermiculite powder applications
20-150 mesh: mainly used for housing insulation materials, domestic refrigeration, sound insulation plaster, piping of safe and kiln lining , retaining heat of boilers.
20-40 mesh: mainly used in automobiles, aircraft, cold storage, wallboard water cooling towers, steel annealing, fire extinguishers, filters and so on.
40-120 mesh: mainly used for oil carpets, roof panels, Dielectric disc.
120-270 mesh: mainly used for wallpaper printing, outdoor advertising, painting, fire prevention card paper for photography soft wood.
325 mesh: golden yellow and bronze, ink cartridges, fire filler.