... in industrial water, city water, city sewage, pure water Ceramic filter grain and sand high-quality pot clay, additive pore-making agent ... solvent through ball grinding, screening, molding and calcining. Ceramic filter grain and sandCeramic filter grain and sand is produced from high-quality pot ... Common specificationΦ0.5-2. Φ4-6, Φ16, Φ25, Φ32 Ceramic filter grain and sands for waste water treatment