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Title: Mechanism of ion-diffusion solid-phase reduction of iron oxides of technogenic origin in the presence of the liquid phase and without it
Authors: Sheshukov, O.
Mikheenkov, M.
Vedmid’, L.
Nekrasov, I.
Egiazaryan, D.
Issue Date: 2020
Publisher: MDPI AG
Citation: Mechanism of ion-diffusion solid-phase reduction of iron oxides of technogenic origin in the presence of the liquid phase and without it / O. Sheshukov, M. Mikheenkov, L. Vedmid’, et al. — DOI 10.3390/met10121564 // Metals. — 2020. — Vol. 10. — Iss. 12. — P. 1-12. — 1564.
Abstract: The processes of iron oxides’ reduction have a complex physicochemical mechanism, with the participation of solid, liquid, and gaseous substances. The article discusses the existing models for the reduction of iron oxides and provides data on the thermodynamic possibility of carrying out the reactions of their reduction through the solid and gas phases. Experimental data on the reduction of iron from industrial scale, obtained by the DSC (differential scanning calorimetry) method, show the kinetic dependence of the rate and completeness of recovery on external factors: pressing pressure during sample preparation and the reagents’ composition. The pressing pressure, under conditions of iron ions’ solid-phase diffusion, has the significant effect by increasing the reagents’ contact area. Under conditions of iron ions’ comprehensive diffusion, the pressing pressure does not affect the reduction processes rate. The introduction of 10 mass.% flux into the raw mixture composition leads to a partially liquid-phase diffusion of iron ions and weakens the effect of the pressing pressure in this process. An ion diffusion-catalytic mechanism is proposed to describe the observed effects during the reduction of iron oxide of technogenic origin. © 2020 by the authors. Licensee MDPI, Basel, Switzerland.
Access: info:eu-repo/semantics/openAccess
SCOPUS ID: 85096793393
PURE ID: 20218382
ISSN: 20754701
DOI: 10.3390/met10121564
metadata.dc.description.sponsorship: The reported study was funded by RFBR (Russian Foundation for Basic Research) according to the research project № 18-29-24064.
Appears in Collections:Научные публикации, проиндексированные в SCOPUS и WoS CC

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