EUROPEAN STEEL TECHNOLOGY AND APPLICATION DAYS 2017 - ESTAD 2017

Environmental protection has become more important in the iron and steel making industry during the last few decades. Stricter environmental protection measures are now required to comply with regulations set by government agencies. Dry dedusting systems (DDS) represent the latest technology for cleaning the primary gas of basic oxygen furnaces (BOF). Due to increasing economic pressure on the steel and iron making industry, DDS with relative high investment costs have become less attractive. Therefore Primetals provides cost efficient dedusting solutions for steel plant operators. As an alternative to the DDS, investment friendly solutions for revamps of widely applied wet dedusting systems (WDS) are provided. A new application is the wet electrostatic precipitators (WESP) downstream of WDS. The WESP can handle the typical particulates with water saturated primary gas and reduce the dust emissions. Furthermore the installation in a bypass shortens the shut down time for the rebuild. A further innovation is a new scrubber design to increase the gas cleaning efficiency. The separation efficiency is enhanced due to a water injection at an angel of 45° against the gas flow. The implemented innovations and improvements will be presented in detail and the results achieved will be discussed.