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Kaolinite

Kaolinite

Kaolinite

Kaolinite belongs to clay mineral, crystal triclinic crystal is layered structure of silicate minerals. Much aphanitic, dispersed powder, loose block assembly. White or light gray, light green, yellow, pale red wait for color, white streaks, earthy luster. 2-2.5 mohs hardness, specific gravity 2.6 2.63. Water imbibition is strong, and the water has plasticity, sticky tongue, dry lumps with a rough feel. Is the main mineral composition of kaolin, common in the weathering crust of magmatic rocks and metamorphic rocks.

Kaolinite and Kaolin

Kaolin is a mainly kaolinite as the main composition of clay minerals, rich in silicon, zinc, magnesium, aluminum and other minerals. It is mainly white mud, grain is exquisite, looks like flour. Its chemical composition is quite stable, known as the “magic stone”. As the main raw material of manufacturing porcelain and pottery. Kaolin mainly under the surface, the texture and composition of different can directly affect the changes in pottery and porcelain kiln, so high quality kaolin can produce excellent artifacts, and often will establish the ancient jun at its periphery.

Application of Kaolin

High purity kaolin with high white degree, soft, easy dispersion suspended in the water, good plasticity and high caking property, excellent electrical insulation properties; With good resistance to acid soluble and low cation exchange capacity, good fire resistance and other physical and chemical properties. Therefore kaolin has become papermaking, ceramics, rubber, chemical industry, paint, medicine and defense of mineral raw materials necessary to dozens of industries. It is reported that the Japanese and kaolin used to replace steel and iron manufacturing cutting tools, lathe bit and internal combustion engine shell application. Especially in recent years, the rapid development of modern science and technology, wide range of application fields of kaolin, some high and new technology of using kaolin as a new material, and even atomic reactor, the temperature of the space shuttle and spacecraft porcelain parts, also made of kaolin.

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