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| | Post Date: 2007-1-9 Expiry date: 6 months |
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TEL: 86-22-27426393 27373087
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Vermiculite brief
1, Brief introduction
The mineral name of the vermiculite is from Latin, which means " worm's form " or "worm's shape". Chinese calls vermiculite the crooked mineral as leech. It is uncertain which chemical composition (Mg, Fe, AL) 3 [(Si'AL)4O10(OH)2].4H2O. The monocline crystal, usually take the form of flake. Brown, yellowish-brown or bronze-colored. Oil gloss. Hardness 1~1.5. Density 2.4~2.7g/cm3, the shape of the vermiculite has two kinds, the thick one is mostly transformed by black mica, etc. keeping the characteristic of mica shape or squama shape; The thin one takes the form of soil, it is so difficult to distinguish which mixed with other clay mineral, the vermiculite is roasted for 0.5~1.0 minutes at 800~1000 c, the volume swells rapidly, increase 8~15 times, the high one can be up to 30 times. Exfoliate vermiculite average unit weight for 100~130Kg/m3, because of roast, expanded vermiculite have tiny air interlayer, so have the function of fine warm-keeping performance..
Vermiculite has been used in various industries for over 80 years. It is mainly used in the construction, agricultural, horticultural, and industrial markets.
Flakes of raw vermiculite concentrate are micaceous in appearance and contain interlayer water in their structure. When the flakes are heated rapidly at a temperature above 870° C, the water flashes into steam, and the flakes expand into accordionlike particles. This process is called exfoliation, or expansion, and the resulting lightweight material is chemically inert, fire resistant, and odorless.
2, Product description
A, Golden vermiculite
Component SiO2 Al2O3 MgO CaO Ph Fe2O3 others
Content 41% 18% 21% 0.8% 8-1% 3.5% < 8%
Production specification:
Specification 2# 3# 4# 5#
Granularity 7-12mm 3.5-7mm 1-3.5mm <1mm
B. Silver white vermiculite
Component SiO2 AL2O3 MgO CaO FeO Fe2O3 TiO2
Content 43.2 12.68 24.23 0.96 1.54 4.06 1.33
Component K2O P2O5 H2O Na2O MnO TiO loss
Content 5.95 0.08 3 1.6 0.043 5.097 6.50
Production specification:
Specification 2# 3# 4# 5#
Granularity 4----8mm 2----4mm 1----2mm 0.3----1mm
Besides the above regular specification, can produce other specification according to customer's requirement at the same time.
3, Use and function:
After roasting, the weight of vermiculite to be light and have the performance of freezing, keeping warm, insulating against heat, sucking sound, and it mainly used in industries extensively such as the building, electricity, petroleum, chemical industry, metallurgy, textile, agriculture and food, etc. Used for insulating against heat, sound insulation and covering materials with paint on the construction,. For agriculture , improving the soil, the adjuvants of chemical fertilizers carriers, materials carriers such as animal's feed, deodorant, domestic animal medicine, pesticide,etc., can also make insecticide, bactericide, disinfectant, organic compound (purlin brain) formates pharmaceutical, and in order to store vegetables and other scarce plants roots, good intermediaries of the stem, leaf. The vermiculite has performance of absorbing to the radioactive element, still can deal with the waste water of some radioactive elements.
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