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VERSION:2.0
METHOD:PUBLISH
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ORGANIZER;CN=ESTAD 2023:mailto:info@metec-estad.com
LOCATION:Room 13
SUMMARY:Recycling of blast furnace sludge: Best available technology
DESCRIPTION:Almost all the iron and steel manufactured in the world is made from pig iron produced by the blast furnace process (BF). However, the dust and especially the sludge generated during the process, do constitute a great challenge for the improvement of the overall sustainability of this highly material and energy intensive industry. 

During the production of pig iron in blast furnace, a Zn- and Pb-containing sludge is generated in the exhaust air cleaning system. More than 50 % of the mass input becomes outputs in form of off-gas and solid wastes/by-products. This toxic waste can be landfilled after dewatering and pretreatment, which is very costly. The sludge particles contain large amounts of Fe and C that could be recycled in the furnace. However, the Zn content of the sludge is high, and the Zn input to the blast furnace must be limited. 
There are no standard processing concepts for a BF-sludge treatment plant. The process design and plant arrangement will primarily depend on the nature of the feed sludge and therefore will be based on analysis and pilot test work that is being performed in AKW Equipment + Process Design technical laboratory. 

On basis of the test results, the suitable and customized process solution will be developed, discussed and later on engineered and executed by AKW Equipment + Process Design. This unique process concept is presented in the following paper: multi-stages hydrocycloning, combined with thickening and filter pressing.

Key Words
Blast Furnace Sludge, Zn-reduction, Hydrocyclones, Thickeners, Filter Press, 

CLASS:PUBLIC
DTSTART:20230614T092000
DTEND:20230614T094000
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