Brief introduction about the application of Kaolin

Compared with uncalcinated kaolin, low-temperature calcined kaolin has a reduced bound water content, an increase in silica and alumina content, an increase in active sites, a change in structure, a smaller and more uniform particle size. Compared with uncalcinated kaolin filled NR rubber, low-temperature calcined kaolin filled NR rubber has basically the same vulcanization characteristic curve, with unchanged Shore A-type hardness and increased tensile strength, Both physical properties meet the requirements of the industry standard for non transparent sports shoe soles.

At present, ceramics, rubber, plastics, artificial leather, self cement, refractory materials, chemical and other industries, as well as agriculture, are not widely used. With the further improvement of kaolin beneficiation technology, the application range of kaolin will become increasingly widespread. Each unit of the coalfield geological system can start from the actual situation and based on the kaolin resources and market demand in the coal measures strata. Kaolin is a non-metallic mineral commonly found in nature. In the past, it was commonly used to produce ceramics, refractory materials, and a small amount of added plastic and rubber as fillers. With the increasing development of various fields of the national economy, people are paying more and more attention to the deep processing of kaolin, because this can not only obtain new materials with special properties, but also improve economic benefits. One of the methods for deep processing of kaolin is to further heat, roast and dehydrate the kaolin that has been elutriated and tough step dried and milled to turn it into metakaolin, which can be used as filler of plastic cable family to improve the insulation performance of cable sheath. Common rubber fillers for footwear mainly include organic fillers and inorganic fillers. The former includes reclaimed rubber and recycled materials, while the latter includes white carbon black, calcium carbonate, titanium dioxide, magnesium carbonate, magnesium oxide, carbon black and zinc oxide. Kaolin is a new type of rubber product filler developed in recent years.

However, all applications of kaolin must be processed to become fine powder before it can be added to other materials and fully integrated.

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