La description
Name:kaolin; kaoline;
Chemical formula:Al2O3·2SiO2·2H2O;
Molecular weight:258;
Color: white muddy; such as impurity with gray, yellow, brown and
other colors;
Composition of theoretical
chemistry:46.54%SiO2，39.5%Al2O3，13.96%H2O;
Category: silicate;
Density:2．54-2．60 g/cm3;
Melting point: About 1785℃;
Classification of kaolin:
1. Classified according to its use and processing methods: calcined
kaolin, metakaolin, water washed kaolin and natural kaolin;
2. Classified according to the minerals: clay mineral kaolin and
non clay mineral kaolin;
3. Classified according to the causes: weathering type,
hydrothermal alteration type, sedimentary type;
4. Classified according to quality:Hard kaolinite: hard and
inflexible, plasticity after grinding;Soft kaolin: soft, strong
plasticity, sand mass fraction < 50%;Sand quality kaolin: soft,
weak plasticity, sand mass fraction >50%;
5. Features: high refractoriness (not less than 1500 degrees),high
whiteness, soft, easily dispersed in water,good plasticity and high
cohesiveness,excellent electrical insulation property,It has good
physicochemical properties, such as good acid solubility, low
cation exchange capacity, good fire resistance and so on;
Granularity: 100mesh, 200mesh, 325mesh, 400mesh, 600mesh, 800mesh,
1000mesh, 1250mesh, etc;
Application:
1. Paper making and coating:additive: substitute for titanium
pigment;
2. Rubber and special cable:reinforcing agent;
3. Industrial plastics:functional packing;
4. Ink, food, medicine, cosmetics:stuffing;
5. High white advanced porcelain and special ceramics:raw
material;
6. High temperature porcelain components (fillers, raw materials)
of atomic reactors, spaceships and spaceships;
7. Manufacturing cutting tools, lathe bits, and internal combustion
engines:iron and steel substitutes;
8. Other fields: coated pigments, paints, water-based latex
coatings, artificial leather, cement, refractory, chemical,
agricultural, coatings, medicine and national defense,
etc.
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