Electrochemical Reduction of Iron Oxides in Aqueous NaOH Electrolyte Including Iron Residue from Nickel and Zinc Electrowinning Processes
Journal article
Submitted version
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https://hdl.handle.net/11250/3056030Utgivelsesdato
2022Metadata
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- Institutt for materialteknologi [2497]
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Originalversjon
The Minerals, Metals & Materials Series. 2022, Part F 341-347. 10.1007/978-3-030-92662-5_33Sammendrag
Experiments were carried out in NaOH-H2O (50–50 wt%) electrolyte with a suspension of Fe2O3 particles at ~100 ℃. A rotating disk electrode of graphite or silver was used as the cathode. The current efficiency for iron deposition was consistently higher than 90%. Recent experiments were carried out by using iron-containing residue from industrial electrolysis processes for producing nickel and zinc. The challenge is to purify the residue before electrolysis.