Mechanism of Solid-State Reduction of Chromite Concentrate
| dc.contributor.author | Lekatou, A. | en |
| dc.contributor.author | Walker, R. D. | en |
| dc.date.accessioned | 2015-11-24T17:35:47Z | |
| dc.date.available | 2015-11-24T17:35:47Z | |
| dc.identifier.issn | 0301-9233 | - |
| dc.identifier.uri | https://olympias.lib.uoi.gr/jspui/handle/123456789/14173 | |
| dc.rights | Default Licence | - |
| dc.subject | carbothermic reduction | en |
| dc.subject | temperatures | en |
| dc.subject | fecr2o4 | en |
| dc.subject | mgcr2o4 | en |
| dc.title | Mechanism of Solid-State Reduction of Chromite Concentrate | en |
| heal.abstract | The mechanism of the solid state reduction of a Greek chromite concentrate by graphite in the temperature range 1100-1470 degrees C is studied. Reduction proceeds via six stages: (i) nucleation of metallic phase at the chromite/graphite interface; (ii) outward growth and propagation of metallic nuclei (the chromite grain consists of an unreduced chromite core enveloped by a partially reduced spinel shell); (iii) formation of a metallic rim at the core/shell interface; (iv) metallisation within the chromite core; (v) sintering due to interaction of the silicate gangue with the spinel grains; (vi) disintegration of the spinel grain and penetration with metal. A diffusion mechanism is postulated that involves an outward diffusion of Fe2+ ions produced by reduction of Fe3+ by Cr2+ ions, which have diffused into the interior of the particle, and in the later stages an outward diffusion of Cr2+ and Cr3+ ions. Diffusion of ions which do not take part in the reduction reactions (i.e. SiO42- and Al3+) also occurs. | en |
| heal.access | campus | - |
| heal.fullTextAvailability | TRUE | - |
| heal.identifier.secondary | <Go to ISI>://A1995TH69200005 | - |
| heal.journalName | Ironmaking & Steelmaking | en |
| heal.journalType | peer reviewed | - |
| heal.language | en | - |
| heal.publicationDate | 1995 | - |
| heal.publisher | Inst. Materials | en |
| heal.recordProvider | Πανεπιστήμιο Ιωαννίνων. Σχολή Θετικών Επιστημών. Τμήμα Μηχανικών Επιστήμης Υλικών | el |
| heal.type | journalArticle | - |
| heal.type.el | Άρθρο Περιοδικού | el |
| heal.type.en | Journal article | en |
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