Numerical support for the presence and role of frozen slag-pig iron interface in DC ilmenite furnace operation
DOI:
https://doi.org/10.17159/Abstract
A numerical backing is given to the frozen slag at the slag-pig iron interface. A finite element model of a radius furnace in idling mode is used to test the notion that the slag solidifies at the slag-pig iron interface because of coming to contact with a colder pig iron. It was found that bringing to contact a slag that is hotter than the pig iron does not lead to slag solidification at the interface. It was further found that the temperature difference between the slag and pig iron is a result of frozen slag at the slag-pig iron interface not the other way around as suggested in literature. Calculations show that the thickness of the frozen slag at the slag-pig iron interface is cm thick for the furnace used.
Making use of a low thermal contact conductance between the slag and pig iron was found to be sufficient to numerically capture the presence of solid slag at the slag-pig iron interface and to preserve the difference between the slag and pig iron phase. This work forms part of a PhD thesis of the author.
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