Vermiculite is a kind of natural, non-toxic mineral, which will expand under high temperature. It is a rare mineral, belonging to silicate. Its crystal structure is monoclinic, and it looks like mica in appearance. Vermiculite is produced when certain granite is hydrated. It is generally produced at the same time as asbestos. Because vermiculite has the ability of ion exchange, it has a great effect on soil nutrition. In 2000, the world's total output of vermiculite exceeded 500000 tons. The main producers are China, South Africa, Australia, Zimbabwe and the United States.

　　Main uses of vermiculite:

　　Building: lightweight material lightweight concrete aggregate (lightweight wall powder, lightweight mortar)

　　Expanded vermiculite

　　Expanded vermiculite

　　Heat resistant material wall material, fire-proof board, fire-proof mortar, fire-resistant brick

　　Thermal insulation: sound absorption materials, underground pipes, greenhouse pipes, thermal insulation materials, interior and tunnel decoration, walls and ceilings in public places

　　Metallurgy: steel frame cladding material, iron making, casting slag removal high-rise building steel frame cladding material, vermiculite bulk material

　　Agriculture and Forestry: Horticulture, golf course lawn, seed preservation agent, soil conditioner, wetting agent, plant growth agent, feed additive

　　Marine fishing: erbium fishing

　　Other aspects: adsorbent, filter aid, active carrier of chemical products and fertilizer, sewage treatment, seawater oil pollution adsorption, cigarette filter tip, explosive density regulator.

　　Vermiculite with different sizes has different uses

　　+Item 20: house insulation equipment, household refrigerators, automobile sound attenuators, soundproof plaster, safe and cellar lining pipes, thermal protective clothing for boilers, long handle scoops for ironworks, refractory brick insulation cement

　　20-40 mesh: Automobile insulation equipment, aircraft insulation equipment, cold storage insulation equipment, bus insulation equipment, wall plate water cooling tower, steel annealing, fire extinguisher, filter, cold storage

　　40-120 mesh: linoleum, roof board, cornice board, dielectric switch board

　　120-270 mesh: wall paper printing, outdoor advertising, paint, increase the viscosity of paint, fire-proof card paper for photographic soft board

　　-Order 270: external supplements for gold and bronze inks and paints