Reduction kinetics of commercial haematite pellet in a fixed bed at 1123–1273 K. (27th May 2016)

• Record Type: Journal Article
• Authors: Beheshti, Reza; Moosberg-Bustnes, John; Kennedy, Mark W.; Aune, Ragnhild E.
• Is Part Of: Ironmaking & steelmaking. Volume 43:Number 5(2016)
• Page Start: 394
• Page End: 402
• Publication Date: 2016-05-27
• Subjects: Fixed bed -- Shrinking Core Model -- Gas-solid reaction -- Heat transfer -- Direct reduction -- Kinetics -- Haematite; Iron industry and trade -- Periodicals; Steel industry and trade -- Periodicals; 669.1
• DOI: 10.1080/03019233.2015.1104072
• Languages: English
• ISSNs: 0301-9233

Abstract

Abstract : In the present study a model for future use in the modelling of moving bed direct reduction reactors has been developed. The model of a fixed bed reactor for the production of sponge iron from haematite incorporates both heat- and mass-transfer, as well as the chemical reduction rate. The model results were compared to the experimental data obtained from a lab scale reactor in the temperature range 1123–1273 K, as well as to the output from a simple model assuming isothermal conditions. The H2 /CO ratio (β) of the reducing gas was in all cases varied from 0.8 to 2.0. Overall the non-isothermal model developed permits a more accurate representation of the experimental data than the isothermal estimates, with a typical discrepancy of only 1.3%.