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| Product Name: |
Vermiculite
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| Specifications |
0.3 每 1 mm,1 每 2 mm,2 每 4 mm,4-8mm |
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Vermiculite
Vermiculite is the generic name for laminar,
hydrated ferromagnesian-aluminum-silicate
minerals that resemble mica in the crude form.
It has a great number of industrial uses by
virtue of its expansion behavior on heating.
When heated rapidly to 900 -1000℃,
interlaminar water turns to steam and causes the
mineral layers to exfoliate or separate into
worm-like pieces. This forms a material with low
density, excellent insulation properties, good
absorption, ion exchange capacity, chemically
stable and non-toxic. The above properties make
it widely used in construction, agriculture and
horticulture, and industrial applicatio.
A, Quality
A typical chemical analysis of Chinese
vermiculite is shown in Table B
Element % by weight
SiO2 38 每 46 %
Al2O3 10 每 16 %
MgO 16 每 35 %
CaO 1 每 5 %
K2O 1 每 6 %
Fe2O3 5 每 13 % (I)
Fe2O3 16 -22 %(II)
TiO2 1 每 3 %
H2O 8 每 16 %
Other 0.2 每 1.2 %
Table B Typical Chemical Analysis
The exfoliated vermiculite has a different
colour according to the difference in Fe2O3
content. Hebei Minmetals classify the
vermiculite into two types, silver-white and
golden-yellow.
Type (I), Fe2O3 content 5 每 13%
Exfoliated vermiculite colour gray-silver-white, similar in colour to South African material.
Type (II), Fe2O3 content 16-22%
Exfoliated colour golden-yellow, similar in
colour to Australia and India etc.
Volume coefficient rate: 4.5 每 10 times:
Impurity content: 8% Max.
Adhere moisture: 5% Max.
The golden 每 yellow vermiculite has a high
reputation in Japan and South Korea, used in
Agriculture and Horticulture, for it＊s stable
quality and very competitive price, while the
silver-white vermiculite is popular for use in
the construction industry
B. Grading
1. Type I 每 silver-white vermiculite.
Hebei Minmetals have designated various grades
dependant on the origin of the vermiculite, eg
HBW-A, HBW-B, HBW-C and KV. Grading depends on
he market.
a) Japan and South Korea market is mainly,
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| Company: |
DFL MINMET REFRACTORIES CORP
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| Contact: |
Mr. Thomas More |
| Address: |
north youyi street |
| Postcode: |
050071 |
| Tel: |
86 311 7793166 |
| Fax: |
86 311 7799798 |
| E-mail: |
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