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ORGANIZER;CN=ESTAD 2023:mailto:info@metec-estad.com
LOCATION:Room 02
SUMMARY:COACH - Cold-bonded agglomerates for the blast furnace with chemically engineered binders
DESCRIPTION:The cold-bonded agglomeration is a method to prepare materials with small particle sizes by turning them into larger pieces (agglomerates) which enable the use of these materials in dedicated processes. Several technologies are available and typically rely on the addition of a binder followed by a compaction step to maximize the contact between the particles of the source material. The suitability of the agglomerates produced for one particular process depends on its propension to maintain a sufficient cohesion between the constitutive particles in a given context : absence of fines generation on transportation belt, maintaining shape during its processing in steelmaking furnaces, …
In the ironmaking context, cold-bonded agglomeration could complement high-temperature sintering and pelletizing for the production of the Blast Furnace burden. It does not require a costly and highly CO2 emitting firing/induration and, in the recycling context, could be applied to a larger range of by-products, wastes and other secondary materials. 
The novelty of the present study is to avoid the use of cement as a binder, removing the detrimental slag addition that the use of cold-bonded agglomerates would have involved. Therefore, the challenge of the partners involved in the project was the production of cement-free cold-bonded agglomerates able to maintain their physical coherence in the conditions of the blast furnace shaft.
Two paths were pursed to achieve this result : firstly the use of novel polymeric binders, secondly the selection of the optimal agglomeration technology between vacuum extrusion and roll-press briquetting.  The suitability of the samples was tested according to metallurgical standards and in particular the mechanical and reduction strength.
We demonstrated that the selected polymeric binder combined with extrusion provides a suitable mechanical resistance at low and high temperatures (upper and lower shaft). The recipe developed becomes a suitable candidate for testing at industrial scale.
CLASS:PUBLIC
DTSTART:20230615T111000
DTEND:20230615T113000
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