Emission reduction research and development of PCDD/Fs in the iron ore sintering

Iron ore sintering process is an important sector for iron and steel industry as well as a major pollution emission source of PCDD/Fs. The PCDD/Fs emission of sintering process has not been properly controlled because the flue gas presents the following characteristics, including large amount, remarkable flow fluctuations and lower concentration. The generation mechanism of PCDD/Fs in the iron ore sintering was discussed systematically and the new developments and technologies of PCDD/Fs emission reduction were also summarized from the source, process and the end treatments. Commonly, the PCDD/Fs formed in drying and preheating zone is transferred to the lower part of the material layer which is a chemical transfer process in the iron ore sintering. Finally, the potential future development of PCDD/Fs emission reduction in the iron ore sintering was also pointed out.