BEGIN:VCALENDAR
VERSION:2.0
METHOD:PUBLISH
BEGIN:VEVENT
ORGANIZER;CN=ESTAD 2023:mailto:info@metec-estad.com
LOCATION:Room 18b
SUMMARY:Benefits of new refractory sleeve materials’ development for SES/SEN/MTSP used in continuous casting operation
DESCRIPTION:Corrosion of zirconia containing refractory is one of the chronic issues that limits the service life of continuous casting nozzles resulting in shortening the casting time. In the present study, various degradation mechanisms of the lime-stabilized zirconia grains are discussed, focusing on microstructural and phase analysis. A classification of corrosion mechanisms is performed based on the phase assemblage and compositions of the reaction products resulting from the chemical interactions between mold-flux slag and zirconia containing refractories. A methodology was developed focusing on an experimental approach, thermodynamic modeling, and materials characterization techniques; this allows the development of new material composition and microstructure used in SEN/SES/MTSP sleeves. Several trials performed in the continuous casting operations demonstrate the benefit of new materials contributing to the longer service life of Vesuvius products generating a longer sequence length for the steelmakers. An industrial example performed in Tenaris Silcotub, Calarasi are given to describe the role of chemistry and fundamentals of chemical interactions between slag and refractory.
CLASS:PUBLIC
DTSTART:20230615T121000
DTEND:20230615T123000
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