... fields of metallurgy, building materials,machinery, petroleum, chemical engineering, shipping, electric power and traffic conveyance and so ... Raw materiala) Main raw material: Kaolin Grog (Chemical component %) ComponentMaterialSiO2Al2O3TiO2Fe2O3CaOMgONa2OK2OKaolin Grog47.0847.682.631.370.410 ... .180.200.25b) Bonding: Chemical component: FormaldehydeHCHO, Melamine, Urea, coupling agent.c) ...