kaolin washing process The sand is first removed by a spiral classifier. It is then entered into a hydrocyclone for classification. The sorted coarse concentrate enters a horizontal spiral centrifugal classifier to separate the paint grade and filler grade kaolin. The raw ore is added with water and dispersant according to the set concentration requirements, and is made into pulp in a blender or tamping machine. The purpose of pulping is to disperse kaolin and separate it from sandy minerals and plant impurities, so as to prepare a slurry of suitable concentration for the next process. Screw classifier to remove coarse sand In the raw kaolin ore, the particle size of quartz, feldspar, mica and other impurities is coarse, generally larger than 325 mesh, and the particle size of kaolin is fine, mainly concentrated in -2μm. The spiral classifier can remove most of the quartz and feldspar coarse sand. Use hydrocyclone to sort the kaolin The hydrocyclone is used for sor