Kaolin is a natural raw material that is refined into an industrial raw material with the help of extensive processing steps. Wet-mechanical processing is used to separate the kaolin from trace minerals. This is done through the classification of various grain sizes with the help of washing drums, cyclone cascades and centrifuges, followed by dewatering by means of sedimentation, filtration and drying. Some kaolin products are also further refined using bleaches and a magnetic separator.
Features
• High degree of whiteness (Y > 85)
• Density 2.6 g/cm3
• Low thermal expansion coefficient: 5*10-6K-1 (at temperatures of 20-300°C)
• Hexagonal, flexible, thin discs
• Small particle size
Key applications
• Rubber
• Emulsion paints
See also Kaolin - it all depends on the right raw materials