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ORGANIZER;CN=ESTAD 2023:mailto:info@metec-estad.com
LOCATION:Room 16b
SUMMARY:Optimization of exothermic starter powder used at sequence start through the use of computational thermochemistry
DESCRIPTION:In today’s competitive market, the demand for high-quality, defect-free steel is unprecedented in industry history. Quality standards have been raised worldwide along with increasing market pressure to reduce and control pricing. Perhaps, the most challenging period is associated with the start-up of the continuous casting sequence. Unstable mould conditions will adversely affect the steelmaker’s ability to control this critical stage of casting. This can lead to conditions resulting in poor cast quality, defects, and even breakouts. In order to get a faster and good and stable lubrication state in the mould, and so decrease risks of sticking or cracks formation, a simple solution consists of adding an exothermic powder on top of the steel in the mould, prior to the continuous casting powder. Through the use of computational thermochemistry (Software FactSage) we can explore and study the influence of the different raw materials on the energetic behavior of multicomponent and multiphasic systems, such as the in-mould behavior of the Flux powder. The thermodynamic calculations can be used to identify the reaction products inside a primary metal smelter, to establish overall heat and mass balances of a process, and to generate phase mappings (such as phase diagrams and predominance diagrams). The method is based on identifying the equilibrium state of a system constrained by different conditions of temperature, pressure, volume, chemical potentials, chemical compositions, and more with a short computational time. Consequently, the method allows us to predict the system behavior and quickly adapt the composition of our exothermic powders to the different local working conditions, steel grades, or standard casting flux while keeping the right exothermic behavior.
CLASS:PUBLIC
DTSTART:20230615T090000
DTEND:20230615T092000
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