Minor applications of kaolin
Kaolin is the starting point for the manufacture of synthetic zeolites by the clay conversion process. In this process, the kaolin is formed into binderless pellets that are then calcined at between 500oC and 600oC to form metakaolin. The pellets are then treated with an alkai hydroxide solution to form pelletised zeolite A. This process requires the use of high purity kaolinite as a feedstock