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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 „Danzig“
SUMMARY:Investigation of Molten Slag Flow and Interactions in the Packed Bed
DESCRIPTION:Molten slag, which is primarily generated in the blast furnace (BF) cohesive zone, trickles down through the coke packed bed in the form of films, rivulets or droplets in the lower zone of the BF. During its downward flow, there are significant interactions occurring between slag and other phases. In terms of these interactions, slag flow behaviour can greatly affect BF productivity and be associated with furnace irregularities. Hence, understanding the interactions between phases is useful to maximizing BF efficiency. In the current study, a Volume of Fluid (VOF) modelling technique was applied to track the movement of individual slag droplets at a mesoscopic level. The numerical modelling was firstly developed and validated through comparisons between simulation and experimental results via qualitative and quantitative methods. The VOF approach was then used to investigate the slag flow behaviour in the packed bed, considering various bed permeabilities, more wide-ranging slag properties, and strong interactions between slag and other phases. Results demonstrate the significant role of modelling at a mesoscopic level in understanding macroscopic slag flow behaviour. Modelling work helps to visualize the trickling behaviour of slag droplets in more realistic and complex conditions representing a BF, and clarify the mechanisms of the different flow patterns generated for variations in operating conditions. As examples, flow characteristics such as localised slag flooding and gas channelling caused by the strong interaction between gas and slag were uniquely identified and analysed. As the hydrostatic pressure dominates the flow of rivulets downwards, slag and liquid iron enhance their respective flows through the bed rather than retard each other. The current modelling proved to be a valuable tool to provide a foundation for better understanding the slag flow behaviour and its interactions with other phases in the BF lower zone.
CLASS:PUBLIC
DTSTART:20220831T120000
DTEND:20220831T122500
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