The filtration materials consist of the excellent kaolin, pore-forming materials.The porcelain sand filter has good chemical stability, high in mechanical strength,high temperature resistance,high corrosion resistance, large surface, good absorption and good ability of impurities eliminating, long life span as well. Furthermore it can replace the quartz sand to solve the problems of short use cycle, easy cracking, the secondary pollution caused by the generation of SiO2 and organic carbon. It is widely used as filter medium in single /double layer filter tank,and mechanical filter to dispose of the industrial sewage,industrial process water, municipal tap water, municipal sewage,pure water, soft water, and act as biologic filter to treat organic sewage. Moreover, it can used as fliter materials to treat various industrial dust and boiler smoke dust in the equipment of fliter dust extractor. size: Ф0.5-2mm ,Ф2-4mm, Ф4-8mm, Ф8-16mm , Ф16-32mm, Ф32-80mm