Kaolin is a very important use of a very wide range of non-metallic minerals. It is composed of a variety of mineral water aluminum silicate, a basic element of minerals kaolinite, water, such as kaolinite clay minerals. Natural kaolin ore output, and can be divided into hard Kaolin and soft Kaolin two industrial type. Hard coal calcined kaolin at its unique six-party lamellar structure, high porosity characteristics, Light-scattering it is a high rate, the advantages of a good hiding power. Moreover, after the modified calcined high brightness and good chemical stability and insulation. Coal calcined kaolin so widely used in paint and coatings, paper, rubber, plastics, cables, ceramics, and other fields.