Description
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AbstractThe topic of this thesis is the development of a numerical model to investigate theheat and mass transport in an EAF freeboard. Some of the challenges presentlyfaced by European steelmakers are increasing costs for raw materials and energy, aswell as strict environmental policies. These can be addressed by improving theenergy efficiency of the EAF steelmaking process by reducing off-gas and coolinglosses. This can be achieved by increasing the degree of combustion of CO and H2in the furnace freeboard. A better understanding of the mechanisms that causeunwanted emissions during the steelmaking process can also help to develop newmethods to reduce pollutants. The long term motivation behind the topic of this thesisis therefore to create a numerical EAF model with which the influence of processinnovations on the fluid flow field, energy transport and chemical reactions within thefreeboard of an electric arc furnace can be analysed. At this stage, the main objectiveis to qualitatively investigate the influence of the arc region on the amount of postcombustion within the freeboard. The effect of a change in the foamy slag height on the resulting amount of post-combustion is also investigated.
