Dan Jinan, Shandong Province nursery Vermiculite Vermiculite Factory outlets

Vermiculite Vermiculite 石济南 Shandong Province factory outlets, Tatsuya vermiculite fast delivery, low prices, large production to ensure credibility, provide free samples. Mobile: 18032023929 QQ: 805221314 Manager Fan Vermiculite is a natural, non-toxic mineral that expands under high temperature minerals. It is a relatively rare mineral, belong to silicate. Its crystal structure is monoclinic, from the shape it looks like mica. Vermiculite is produced when certain granite hydration. It is generally associated with asbestos while producing. Due to the ability of vermiculite ion exchange, its soil nutrients have great effect. 2000 world output of over 500,000 tons of vermiculite. The main producing countries are China, South Africa, Australia, Zimbabwe and the United States. Vermiculite is a similar montmorillonite clay minerals, silicate layered structure. Usually made by hydrothermal biotite alteration or weathering. It sometimes looks coarse biotite appears (this is the illusion of biotite vermiculite), sometimes subtle shape have become soil. When the vermiculite is heated to 300 ℃, it expanded 20-fold and bend. This time, a bit like a leech vermiculite (commonly known as leech), so it has such a name. Vermiculite is generally brown, yellow, dark green, shiny, like oil, is grayed out after heating. Vermiculite used as building materials, adsorbents, fireproof insulation materials, machinery lubricants, soil conditioners, etc., widely used. The main vermiculite formula (Mg, Ca) 0.7 (Mg, Fe, Al) 6.0 [(Al, Si) 8.0] (OH4.8H2O). Common formula (Mg2.36Fe0.48Al0.16) (Si2.72Al1.28O10 (OH) 2) (Mg0.32 (H2O) 4.32) vermiculite can stage can be divided into vermiculite and vermiculite, press Colors can be divided into golden vermiculite, silvery white vermiculite, white vermiculite. Vermiculite high temperature firing the rapid expansion of its volume can be 6-20 times, after the expansion of the proportion of 60-180kg / m3, with strong thermal insulation properties. Often depend biotite or phlogopite was false. Mostly brown, brown, gold, bronze, sometimes greenish. Shiny mica relatively weak, oil sheen or pearly. Cleavage completely, there is a flexible sheet. Hardness of 1 to 1.5. The relative density of 2.4 to 2.7. Polarizing microscope: multicolor colorless to light brown. Biaxial crystal (-), the incident angle is small. Ng = 1.545 ~ 1.585, Nm = 1.540 ~ 1.580, Np = 1.525 ~ 1.560. Cation exchange and adsorption;; expandable vermiculite also has good water absorption; sound insulation; heat insulation and fire resistance; freezing tolerance; stable chemical properties of exfoliated vermiculite. Insoluble in water. pH value of 7-8. Non-toxic, tasteless, no side effects.