Reduction in packed bed of iron ore and coal under one-dimensional heating : experimental results and modelling

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dc.contributor.author Coetsee, Theresa
dc.contributor.author Pistorius, Petrus Christiaan
dc.date.accessioned 2010-03-16T07:34:50Z
dc.date.available 2010-03-16T07:34:50Z
dc.date.issued 2009
dc.description.abstract Packed beds of coal and iron ore (mostly in the size range 425–850 mm) were heated by thermal radiation to the bed surface, to test possible rate determining steps, the effect of coal volatiles, and whether the previously predicted near constant and approximately linear relationship between heat transfer and reduction holds. Bed depths were mostly 40 mm and 16 mm in some cases. The results confirm that coal volatiles contribute significantly to reduction, reducing the bed temperature slightly, decreasing the energy requirement for reduction, and increasing the extent of reduction. A one-dimensional heat transfer and reaction rate model suggests that the thermal conductivity through reacted layers is higher than predicted, likely by the formation of continuous metal paths and of openings which support radiative heat transfer. en
dc.identifier.citation Coetsee, T & Pistorius, PC 2009, 'Reduction in packed bed of iron ore and coal under one-dimensional heating: experimental results and modelling', Ironmaking & Steelmaking, vol. 36, no. 5, pp. 363-370. [http://www.maney.co.uk/index.php/journals/irs/] en
dc.identifier.issn 0301-9233
dc.identifier.other 10.1179/174328109X422584
dc.identifier.uri http://hdl.handle.net/2263/13461
dc.language.iso en en
dc.publisher Maney en
dc.rights © 2009 Institute of Materials, Minerals and Mining en
dc.subject Carbothermic reduction en
dc.subject Coal volatiles en
dc.subject Heat transfer control en
dc.subject Thermal radiation en
dc.subject.lcsh Heat -- Transmission en
dc.subject.lcsh Direct reduction (Metallurgy) en
dc.subject.lcsh Radiative transfer en
dc.title Reduction in packed bed of iron ore and coal under one-dimensional heating : experimental results and modelling en
dc.type Article en


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