10/25/2012 | Author / Editor: Andreas Peters * / Marcel Dröttboom
A new dust removal facility for railcar unloading has been installed at Thyssenkrupp Steel's blast furnace operations in Duisburg-Hamborn, Germany. Due to the high efficiency of the system, dust emissions have fallen below statutory limit values.
Constantly rising environmental protection requirements to reduce fine dust emissions on bulk cargo transhipment set new standards to integrated steel mill operators. A worldwide unique mobile high-performance dust removal facility for bulk cargo unloading jointly developed by Thyssenkrupp Uhde Engineering Services and Thyssenkrupp Steel Europe has been in operation since January 2008 on the elevated railway bunker unit in the blast furnace operations at Duisburg-Hamborn in Germany.
Blast furnaces No. 8 (see Fig. 2) and No. 9 at the Thyssenkrupp Steel Europe site in Duisburg-Hamborn, Germany, receive their required raw materials supplies through an elevated railway bunker unit (see Fig. 3) comprised of 64 day-capacity bunkers. Raw materials are delivered in goods-trains, allocating to these goods trains- depending on the type of raw material delivered - one of the three leading-in tracks to the elevated bunker unit where the raw materials are dumped into the day-capacity bunkers. The transshipment of material performed each day through these 64 day-capacity bunkers amounts to approx. 18,000 tonnes.
In the course of the new construction of blast furnace No. 8, protection of the environment from fine dust emissions called for the development of an ultra-modern dust capture system for the elevated railway bunker unit. Fine dust emissions evolving on wagon unloading were to be captured directly with this dust capture system and to be passed on in a controlled manner to the central filter station. This new system had to be integrated into the elevated railway bunker unit built at the beginning of the 20th century, into which only very limited additional loads may be introduced.
A very specific challenge was posed by the demand for developing a modular system, making it possible to deliver the individual components in the largest possible units with the aim to keep necessary railway track blockages for pulling the components as short as possible and avoiding any interference with the running production of the other blast furnaces. Blast furnace No. 4 was to be taken out of operation after putting the new blast furnace No. 8 on the blast. Ultimately the system to be installed even made it possible to perform extensive repairs to the reservoir bunker unit during set-up.
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