State of the art in air pollution control for sinter plants

In integrated steel mills the sinter plant is one of the major sources of emissions to the atmosphere whereas the emissions of waste water and solid residues from the sinter plant are usually less significant. Therefore, state-of-the-art emission control technology for off-gas treatment is essential in order to comply with stringent emission limits. In the first part of this chapter the sinter process is described, the resulting emissions are characterized and primary measures to reduce the off-gas volume and the emission of various pollutants are presented. The second part gives an overview of the state-of-the-art emission control technologies applied in sinter plants for the reduction of particulate emissions, emissions of SO2 and other acid gases, NOx emissions and emissions of dioxins. In the third part methods of treating and recycling the residues from sinter plant off-gas cleaning are described. The last part describes some possible future developments in air pollution control for sinter plants.