Vermiculite flakes, natural vermiculite flakes

Vermiculite flakes, vermiculite ore is called, is not expanded vermiculite collectively. After the vermiculite mined through to remove impurities, are present on the apparent sheet, so called vermiculite flakes, also known as vermiculite ore, vermiculite ore, raw vermiculite, not expanded vermiculite, vermiculite without foam stone. Slate the name of vermiculite mineral comes from the Latin, with a "worm-like", "worm track shape" means. Vermiculite flakes is heated to 800 degrees after the swelling deformation, bending deformation occurs during expansion, then a bit like a leech vermiculite (commonly known as leech leech), hence the name.

Vermiculite flakes are generally brown, yellow, dark green, like oil sheen. Heated they become yellow, brown, light white. Vermiculite can be used as building materials, absorbents, fire insulation materials, machinery lubricants, soil conditioner and so on.

Vermiculite flakes of the chemical formula (Mg, Ca) 0.7 (Mg, Fe, Al) 6.0 [(Al, Si) 8.0] (OH4.8H2O). Monoclinic, often flaky. Brown, yellow brown or bronze. Oil sheen. Hardness of 1 to 1.5. Density of 2.4 ~ 2.7g/cm3, vermiculite, calcined at 800 ~ 1000 ℃, the rapid expansion of volume, increasing from 6 to 15 times as high as up to 30 times. Vermiculite after expansion is 100 ~ 200Kg/m3 average bulk density for the role by calcination vermiculite expansion has a small air cavity, it has excellent thermal insulation properties.

The use of vermiculite flakes have been widely applied to the construction, metallurgy, petroleum, shipbuilding, environmental protection, insulation, heat insulation, insulation, energy conservation and other fields. Livestock: the expanded vermiculite has a unique structural characteristics and surface properties, as well as non-toxic, sterile and chemically inert, can be used as carrier, adsorbent, fixing agent, and feed additives.