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Enhancing Synthetic Zinc Ferrite Hydrochloric Acid Leaching by Using Isopropanol as a Solvent

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Abstract

Zinc ferrite (ZnFe2O4) is a by-product of non-ferrous metal production and is considered a promising source of raw zinc. The most efficient way to extract zinc from its ferrite is via acidic extraction, specifically leaching by hydrochloric acid. A comparative study of synthetic zinc ferrite hydrochloric acid leaching in isopropanol, aqueous, and the mixed solvent was performed. Zinc ferrite was obtained by sintering a zinc and iron (III) oxide mixture. Crushed samples were subjected to leaching in 1 M HCl at 323, 333, and 353 K and pulp density of 1 g/100 mL. The dissolution of zinc and iron into solution in organic media reached 77% at 353 K, while in an aqueous environment this value was 65%. The activation energy of 70.0 kJ/mol was found for the leaching process in an isopropanol environment, which is lower than that in an aqueous solution by 15%. The more efficient leaching effect of isopropanol is attributed to the lower dielectric constant of the alcohol which increases the affinity of chloride anions for zinc and iron cations at leaching.

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Data Availability

The data supporting the results can be made available from the corresponding author upon request.

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Funding

This research was funded by the Science Committee of the Ministry of Education and Science of the Republic of Kazakhstan (Grant no. AP09562754).

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Contributions

Conceptualization, R.N.; methodology, R.N. and G.K.; investigation, R.N. and G.K.; resources, R.N.; writing—original draft preparation, R.N. and G.K.; writing—review and editing, R.N.; visualization, G.K; project administration, R.N.; funding acquisition, R.N. All authors have read and agreed to the published version of the manuscript.

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Correspondence to Rashid Nadirov.

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Nadirov, R., Karamyrzayev, G. Enhancing Synthetic Zinc Ferrite Hydrochloric Acid Leaching by Using Isopropanol as a Solvent. Mining, Metallurgy & Exploration 39, 1743–1751 (2022). https://doi.org/10.1007/s42461-022-00648-3

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  • DOI: https://doi.org/10.1007/s42461-022-00648-3

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