1. brightness and brightnessWhiteness is one of the main parameters of kaolin's technological properties. Kaolin with high purity is white. For ceramic raw materials, the whiteness is more important after calcination. The higher the whiteness of calcination, the better the quality
Kaolin is widely used in papermaking industry. There are two main areas, one is in the paper (or paper) in the process of using filler kaolin used in paper making, the paper can give good coverage performance and good gloss coating performance, but also increase the paper whiteness, opacity, smoothness and printing well, greatly improve the quality of the paper. The other one is used in surface coating process of paint.Kaolin formed by the combination of mud with water, under the action of external force deformation, external force is removed, the nature can still maintain this deformation is plasticity. Plasticity is the basis of kaolin in ceramic body molding process, is also the main technology indexes. Usually with plasticity index and plasticity index to indicate plasticity the size of the plasticity index refers to the moisture content minus plastic limit water content of kaolin clay material liquid limit, expressed as a percentage of the plastic index W =100 (W -W liquid limit and plastic limit). Forming plasticity index representative of kaolin clay material can be directly measured, crushing the mud ball load and deformation size with plastic instrument, kg cm said, often plasticity index is high, the better the performance of its forming.
Kaolin whiteness, soft, easy to disperse in water, suspension has good plasticity and high adhesion, excellent electrical insulation properties and good acid soluble cationic, low resistance and other physical quantity, exchange of good properties. The clay minerals and clay minerals, with many excellent technical characteristics. Such as: water absorption, plasticity, strong adhesion, high refractoriness, good insulation and chemical stability, but also has good sintering properties in 1365 DEG C to form white blank, no deformation.
