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VERSION:2.0
METHOD:PUBLISH
BEGIN:VEVENT
ORGANIZER;CN='8th ECIC & 9th ICSTI 2022':MAILTO:info@ecic-icsti.com
LOCATION:Room „Focke Wulf“
SUMMARY:Dynamic analysis of raceway formation
DESCRIPTION:In ironmaking blast furnace, the raceway zone is one of the most important regions, since it strongly relates to the  efficiency and the stability of the blast furnace process. Thus, the understanding the characteristics of the raceway zone is quite important in designing and operation of blast furnace operation. In this study, formation behavior of raceway in cold model was numerically analyzed and was discussed. A mathematical model of particle and fluid dynamic behavior was developed. The model tracked particle behavior by using the discrete element method and solved fluid flow field by using traditional computational fluid dynamic technique. These methods were combined through the distribution of void fraction and the flow resistance in the packed bed. The model was applied to some conditions in cold model experiments, and the raceway behaviors were successfully reproduced. The cold blast extruded the particles just in front of the tuyere and formed a cavity. Then the particle circulation was induced. The model also successfully revealed the transient variations of gas flow pattern, pressure distribution and inter-particle contact force network as well as the particle motion. Under the fixed bed condition, the formation behavior and the final size of the raceway were strongly affected by the initial packing condition. Contrarily, the size and the flow behavior of the formed raceway were almost independent of the initial packing. Additionally, the particles were numerically tracked, and the motion and the force balance were analyzed along the particle trajectories. 
CLASS:PUBLIC
DTSTART:20220630T160000
DTEND:20220630T162500
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