1.Calcined kaolin for refractory material. 2.Professional manufacture. 3.10 years of exporting experiences 4.ISO9001certified Applications:Calcined kaolin powder for refractory materials.Chemical composition:Al2O3: 44-48%SiO2:50%-53%Fe2O3: 0.8% maxTiO2: 1.4% maxCaO+MgO: 0.5 maxK2O+Na2O: 0.4 maxSize:16-30 mesh, 30-60 mesh, 200mesh, 270 mesh, 320 mesh.