Tianjin factory direct vermiculite nursery

Tianjin factory outlets nursery vermiculite, 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. Vermiculite is a similar montmorillonite clay minerals, silicate layered structure. Usually made by hydrothermal biotite alteration or weathering become. 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. Then vermiculite bit like leeches (leech commonly known as leech), so it has such a name. Vermiculite is generally brown, yellow, dark green, like oil sheen. Heated they become gray. Vermiculite used as building materials, adsorbents, fireproof insulation materials, machinery lubricants, soil conditioners and the like. First, the nature and structure of vermiculite vermiculite formula Mg x (H 2 O) {Mg 3-x [AlSiO 3 O 10] (OH) 2}, is a magnesium aluminum silicate secondary water metamorphic minerals, shape like mica, usually by black (K) mica by hydrothermal alteration or weathering, heat loss when its expansion was deflection shape, shape resembles leech, it said vermiculite. 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 by stages into vermiculite and vermiculite expansion, by color It 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. 1: the expanded vermiculite slab on the roof, can play a very good effect compartment temperature, make building homes cool. Vermiculite brick brick high-rise building wall panels, can go to the noise, fire, moisture and other effects, but also reduce the load floor. 2: Vermiculite is used in the greenhouse, with loose soil, good air permeability, water resistance, temperature and other characteristics, it is conducive to crop growth, and can reduce fertilizer inputs. In the nascent soilless cultivation technology, it is the essential raw materials. 3: vermiculite insulation adhesive mix and the amount can be made of an insulating board. 4: There Vermiculite is also used in medicine, animal feed and other industries. 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. , Tasteless, no side effects.