Kaolin composition is mainly kaolinite, because of its good plasticity and high adhesion, excellent geoelectric insulation, acid resistance, fire resistance and other physical and chemical characteristics, is now used in many high-tech fields. Various kaolin production enterprises adopt different processes and preparation methods because of the different fields used. The kaolin process required in the coating industry is: roughing - crushing - dry and wet grinding - magnetic separation - press filtration dehydration - drying classification - calcination - cooling - product. The XSG series rotary flash dryer produced by our company is a step of drying classification in its process, and it is also a more important step. The final product has the advantages of stable particle size distribution, stable viscosity, uniform coating, strong adhesion and low wear.
Flash drying is based on the wind as wet and heat carrier, and the fan as power, to achieve the quality and heat exchange in the drying process, so that the wet part of the material changes phase, and the separation of the material and the wet part is achieved, that is, drying. The bottom of the main machine is provided with a powerful crushing mechanism, which can make the filter cake wet material added by the screw can be fully dispersed, fully contact with the hot air, and increase the thermal contact area. Increase evaporation intensity to achieve instant drying. Therefore, the moisture and fineness of the product are uniform and the quality is good. There is also a sorting mechanism at the top, the dried material is sorted at the tower, the unqualified control continues to dry in the tower, and the material after reaching the requirements of the tower is separated and recovered by the gas-solid separator, and discharged through the discharge device.
