Kaolin is a general term for a family of clay minerals, the basic composition of the kaolinite group and the more water the kaolinite group, mainly composed of kaolinite, halloysite up to levels of more than 90 percent, followed by water mica, often mixed with pyrite, limonite, anatase, quartz, chalcedony, alum, and sometimes a small amount of organic matter. Kaolin has plasticity, bonding, sintering, and fire resistance, excellent process characteristics, it is widely used in the field of ceramics, paper, rubber, plastics and refractory industries.