Silver White Vermiculite | Global Trade leader ecrobot

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Silver White Vermiculite

Posting date : Dec 29, 2007

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Free Member Scince Oct 17, 2006

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MINERAL PRODUCTS | Mineral fu

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27-

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Detailed Description

Sell: vermiculite The name of the vermiculite mineral comes from Latin, there is meaning of" worm's form . Chinese calls vermiculite the crooked mineral as leech. Chemical composition of vermiculite( Mg, Fe, AL) is 3 [(Si、AL)4O10(OH)2 ]?4H2O, but it is indefinite to often change. The monocline is brilliant , usually take the form of one. Brown, yellowish-brown or bronze-colored. Oil gloss . Hardness is 1~1. 5. Density 2.4~2.7g/cm3 , the form of the vermiculite has two kinds of thickness, the thick one is transformed by black mica,etc. more, Keep the slice of glimmer or scale's flaky form ; The thin one takes the form of soil , mix with other clay mineral, difficult to distinguish, The vermiculite is roasted for 0.5~1.0 minutes in 800~1000 ℃ , the volume expands rapidly, increase 8~15 times, The high one can be up to 30 times. Vermiculite average unit weight after expanding for 100~130 Kg/m3 because of roast and expand vermiculite of function have tiny air separate layer, So have fine performance of keeping warm.