Currently, the global production of kaolin about 40 million tons. What are the main uses of the kaolin?It has the characteristic of high whiteness , soft, easily dispersed suspended in water , good plasticity and high adhesion, excellent electrical insulation properties after rotary kiln; it also has good acid -soluble , low cation exchange capacity , preferably the physicochemical properties of the refractory.So kaolin has become the required mineral raw materials in dozens of industries,like papermaking, ceramics, rubber , chemicals, paints, pharmaceuticals and defense,etc.
Kaolin is a kaolinite or halloysite as a main component , fine texture of pure clay,named by first discovered in the Kaolin village which is nearby Jingdezhen. According to historical records ,the clay in Jingdezhen Kaolin village area was mining heyday in the early Qing Dynasty,Guangxu years began to gradually decline,and famous for white and delicate,is the indispensable raw material for pre-forming.So it follows the local potters village name " kaolinite "，to distinguish the clay producing in other place.Then implied, any place with kaolin kaolin produced has the same shape and purpose in producing,all Called kaolinite.As Xingzi Kaolin,Fuzhou kaolin and so on.
In recent years , with advances in science and technology, the kaolin after calcined by rotary kiln have a range of applications.According to the information : a research institute under the U.S. Department of Agriculture researchers found that after kaolin diluted painted on the vines , to prevent or reduce pest damage. Such as apples, pears and other fruit trees sprayed him with kaolin solution , reduce the strong summer sun on a tree body heat radiation , thus reducing water evaporation , help to improve fruit production rate of fruit trees ; If orchards generally promote the use of kaolin , can reduce pesticide more than half of the amount , in favor of reducing the cost of production of fruits,edible fruit safety is improved.Meanwhile, the U.S. Department of Agriculture researchers also found that : put a certain amount of kaolin added gelatinous mixture made pesticides sprayed on crops, not only can reduce the amount of pesticides and insecticides extended time , if the grain, vegetables and other crops also applied kaolin blending pesticide spraying , which not only greatly reduce the cost , but also significantly reduce the pesticide residues in crops .Kaolin, calcined kaolin rotary kiln can be used instead of steel manufacturing cutting tools, drills and lathes engine housing and other aspects of the application . In some high-tech fields , many countries have begun to make extensive use of kaolin as a new material , even atomic reactors, high temperature porcelain shuttle and spacecraft parts , also made of kaolin.Kaolin in the paper industry is very extensive application , fillers used in the papermaking process. It is also used to make the surface of the pigment in the coating process . Kaolin used in paper , the paper can give good coverage and excellent performance properties of the coating gloss , but also increase the whiteness of the paper , opacity, smoothness and printability , greatly improve the quality of the paper. In short , the kaolin after calcined by rotary kiln brought huge economic benefits to today's society and people.