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.
