In situ neutron diffraction study of the reduction of New Zealand ironsands in dilute hydrogen mixtures

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dc.contributor.authorLongbottom, RJen_AU
dc.contributor.authorIngham, Ben_AU
dc.contributor.authorReid, MHen_AU
dc.contributor.authorStuder, AJen_AU
dc.contributor.authorBumby, CWen_AU
dc.contributor.authorMonaghan, BJen_AU
dc.date.accessioned2025-02-13T00:44:06Zen_AU
dc.date.available2025-02-13T00:44:06Zen_AU
dc.date.issued2018-01-17en_AU
dc.date.statistics2025-02-12en_AU
dc.description.abstractThe reduction of New Zealand titanomagnetite ironsand in a dilute hydrogen–nitrogen gas mixture was studied in situ using neutron diffraction. Neutron diffraction allowed in situ observation of large samples during reduction at high temperatures. Australian hematite ore, studied as a comparison, reduced much more quickly than the pre-oxidised ironsand, which in turn reduced more quickly than raw ironsand. The ironsand was predominantly titanomagnetite with small amounts of titanohematite. The rate of wüstite formation increased and metallic iron was formed only after the reduction of titanohematite. Experimental results confirmed the expected reduction pathway for initial reduction of titanomagnetite ore was described well by a three-interface shrinking core model. The rate controlling step in the reduction reactions studied was the mass transport of water vapour in the bulk gas. At higher temperatures, slow removal of water vapour meant that the pH2O increased, thus preventing reduction of wüstite to metallic iron. © 2025 Informa UK Limited.en_AU
dc.description.sponsorshipThis work was supported by Ministry of Business, Innovation and Employment [grant number RTVU1404].en_AU
dc.identifier.citationLongbottom, R. J., Ingham, B., Reid, M. H., Studer, A. J., Bumby, C. W., & Monaghan, B. J. (2019). In situ neutron diffraction study of the reduction of New Zealand ironsands in dilute hydrogen mixtures. Mineral Processing and Extractive Metallurgy, 128(3), 183-192. doi:10.1080/03719553.2017.1412877en_AU
dc.identifier.issn2572-6641en_AU
dc.identifier.issn2572-665Xen_AU
dc.identifier.issue3en_AU
dc.identifier.journaltitleMineral Processing and Extractive Metallurgyen_AU
dc.identifier.pagination183-192en_AU
dc.identifier.urihttps://doi.org/10.1080/03719553.2017.1412877en_AU
dc.identifier.urihttps://apo.ansto.gov.au/handle/10238/15976en_AU
dc.identifier.volume128en_AU
dc.languageEnglishen_AU
dc.language.isoenen_AU
dc.publisherTaylor and Francisen_AU
dc.subjectNeutron diffractionen_AU
dc.subjectNew Zealanden_AU
dc.subjectHydrogenen_AU
dc.subjectNitrogenen_AU
dc.subjectGasesen_AU
dc.subjectIronen_AU
dc.subjectTemperature rangeen_AU
dc.subjectIron oresen_AU
dc.subjectTemperature rangeen_AU
dc.titleIn situ neutron diffraction study of the reduction of New Zealand ironsands in dilute hydrogen mixturesen_AU
dc.typeJournal Articleen_AU
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