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General
domestic sheet sericite mica mine is formed due to the role of regional
nature. Mineral composition is relatively simple, the main ingredients
are sericite mica and quartz, about 50% two components each. Ore
appears delaminated structure, likes crystal structure of
flake-granite, has the exterior of a silken luster, a hand out smooth
and grease. The current process generally are divided into dry and wet
two kinds of methods.
Dry method
Processing principle: Under the effect of the mechanical power and wind power, the raw ore
causes hit, cut and friction each other between the material and the
medium, thus causes the material particle to become fine.
Production technology: see color picture
Wet method
Processing principle: Under
the aqueous medium condition, the sericite mica and the quartz are
stripped by roller grinding and stripping. Next, through hiting
mutually and cutting, causes the material granular to become small.
Last, remove the sand through the water power eddy to make the sericite
mica granular to be concentrated.
Production technology: see color picture
Performance difference between dry and wet method of sericite mica
Main difference between the dry and wet method process lies in:
Dry process is unable to reject mineral impurity and so on associated
the quartz, the product purity low, the quality fluctuation big, what
is more essential is the sheet structure of sericite mica but is
destroyed because dry- grinding, affects the product quality and the
application. The wet method process after the dressing, except mixed
concentrates, product purity high, quality stable, at the same time the
sheet structure obtains well protects, ratio of diameter to thick big.
Therefore t wet method process product receives more attention.
Characteristic of wet method sericite mica:
1. The stripping and flaking off by wet process, the sheet structure
maintenance complete, ratio of diameter to thick is big.
2. Removing sand, the flotation selection and concentration by wet process, the purity of sericite mica is high;
3: Stripping and superfining by wet process, the granularity is thin also the scope of size controls narrow;
4. De-iron and bleaching by wet process, whiteness of product enhances above 10% than dry process.
■ Properties contract table between dry and wet method
Technology
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Dry method |
Wet method |
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Properties |
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Granular size |
100-600 mesh |
425-5000 mesh |
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Sericite mica % |
40-60% |
80-98% |
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Other composition |
SiO2（%） |
65-75 |
50-58 |
Al2O3（%） |
13-18 |
26-30 |
K2O（%） |
4-7 |
7-9 |
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Ratio of Diameter to thickness |
15-24 |
50-80 |
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Whiteness O |
65-72 |
78-82 |
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Bulk density g/ml |
0.4-0.6 |
0.25-0.35 |
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Carbonate salt |
0.5-10%( uncertain ) |
Zero |
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