resumo
Iron ore represents a potential feedstock for the alkaline electrowinning of iron from suspensions. However, several difficulties can be imposed during the electrowinning due to the presence of several iron oxide types with different iron valences (e.g. hematite with magnetite), requiring further studies for establishing electrowinning as an alternative technology for iron production. In fact, an adverse effect on the Faradaic efficiency was previously reported when using magnetite as feedstock. The present study demonstrates, for the first time, the possibility of obtaining relatively high Faradaic efficiencies (66%) with hematite-magnetite mixtures at low temperature (80 degrees C). (c) 2023 The Author(s). Published on behalf of The Electrochemical Society by IOP Publishing Limited. This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 License (CC BY, http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse of the work in any medium, provided the original work is properly cited.
palavras-chave
REDUCTION; PARTICLES; DIAGRAMS
categoria
Electrochemistry; Materials Science
autores
Boehme, C; Starykevich, M; Constantinescu, G; Kovalevsky, AV; Lopes, DV
nossos autores
Andrei Kavaleuski
Investigador principal
Daniela Vanessa Rosendo Lopes
Investigador Júnior
Gabriel Constantinescu
Investigador
Maksim Starykevich
Investigador JúniorProjectos
CICECO - Aveiro Institute of Materials (UIDB/50011/2020)
CICECO - Aveiro Institute of Materials (UIDP/50011/2020)
Associated Laboratory CICECO-Aveiro Institute of Materials (LA/P/0006/2020)
Thermoelectric oxide composites: design through controlled interactions (TEOsINTE)
Collaboratory for Emerging Technologies, CoLab (EMERGING TECHNOLOGIES)
agradecimentos
The authors acknowledge the European project SIDERWIN (SIDERWIN- DLV-768788-Horizon 2020/SPIRE10) and CICECOAveiro Institute of Materials, UIDB/50011/2020, UIDP/50011/2020 & LA/P/0006/2020, financed by national funds through the FCT/MCTES (PIDDAC). Gabriel Constantinescu acknowledges the TEOsINTE project (Grant 101003375), funded under the H2020-EU.4. Programmes (MSCA-IF-EF-ST - Standard EF).