Vermiculite is a layered structure of the magnesium aluminum silicate secondary water metamorphic minerals the the ore outside like mica, usually black (gold) mica by hydrothermal alteration or weathering, because of its heat dehydration expansion was flexing like the shape resembles leeches, so called vermiculite. Vermiculite scaly Zhuang flake or fake crystals to the monoclinic system, overlapping scales 0.54cm thickness can be stacked one million; color was golden, brown, green and brown, dark green, black and mottled; density of 2.2 -2.8g/cm3, hardness 1-1.5, loose density 1.1-1.2g/cm3, the melting point of 1320-1350 ° C, the compressive strength of 100-150MPa. Vermiculite 800-1000 ℃ calcined, the volume can be increased rapidly 8-15 times, up to 30 times. The color becomes golden or silvery generate a loose texture of the expanded vermiculite. Expanded vermiculite with heat insulation, Paul the cold antifreeze and insulation good performance, capacity 90-145kg/m3, thermal conductivity of 0.047-0.081W / (mK), the Refractoriness 1300-1350 ° C, when the sound frequency 512Hz suck acoustic coefficient 0.53-0.63, 24h moisture in the environment of relative humidity of 95% -100% to 1.1%, soaked in water for 1 hour, the quality of water absorption of 265%, the volume of water absorption was 40.6%. firing point for 1370 -1400 ℃, tasteless, non-toxic, not spoiled, antibacterial, but not acid, poor dielectric properties. ,2-4MM than the heat capacity / J. (kg.K) -1 0.157 Specifications :1-3MM vermiculite vermiculite ,4-8MM vermiculite, 8-12MM vermiculite, 10 mesh vermiculite, 20 mesh vermiculite, 40 Head vermiculite, 60 mesh vermiculite, vermiculite 80 mesh, 100 mesh vermiculite, 120 mesh vermiculite, 200 mesh vermiculite, 325 mesh vermiculite, 400 mesh vermiculite, vermiculite 500 mesh, 600 mesh vermiculite, 800 Head vermiculite, the 1250 Head vermiculite.