Application of zinc ferrite reduction in the extraction of Zn, Ga and In from zinc refinery residue

Kashyap, Vivek; Taylor, Patrick R.; Karumb, Evody Tshijik; Cheshire, Michael C.

doi:10.1016/j.mineng.2021.107078

Minerals Engineering

2021

DOI: 10.1016/j.mineng.2021.107078

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Application of zinc ferrite reduction in the extraction of Zn, Ga and In from zinc refinery residue

Vivek Kashyap

Patrick R. Taylor

Evody Tshijik Karumb

et al.

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2024

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Cited by 13 publications

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References 37 publications

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“…Among them, the pyrometallurgical processes combined with leaching are effective on the phase transformation of zinc ferrite. For instance, reducing gases including CO and H2 change zinc ferrite into weak acid soluble zinc oxide and magnetically separated iron oxides [7,8]. Roasting by sulphate makes zinc in zinc ferrite be water soluble zinc sulphate [9,10].…”

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A novel leaching process of zinc ferrite and its application in the treatment of zinc leaching residue

Zhang,

Wang,

et al. 2024

J. Phys.: Conf. Ser.

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Zinc ferrite is a refractory phase generated in the pyrometallurgical process of zinc and steel production. Much energy is invested in the decomposition of zinc ferrite to recycle zinc since zinc ferrite is difficult to leach. In this work, a novel leaching process targeted at decomposition of zinc ferrite was proposed to save energy and improve metal recovery efficiency. The key of this novel leaching process was the use of copper powder as the reductant. Leaching of zinc ferrite in the presence of copper powder was investigated. The extraction of zinc was 100% when molar ratio of copper to zinc ferrite was 1.5 while the extraction of zinc was only 19.3% without copper. Effects of leaching temperature, acid concentration, the ratio of liquid to solid and reaction time were studied. Under the conditions: 60 °C, ≥ 70 g·L1 H2SO4, the ratio of liquid to solid ≥ 25 mL/g and the molar ratio of copper to zinc ferrite ≥ 1.5 at the open system, the synthetic zinc ferrite was dissolved completely within 60 min. Besides, the zinc ferrite-bearing zinc leaching residue from a roast-leach-electrowin plant was analyzed and leached under the optimal conditions. It was found that most of zinc ferrite in the zinc leaching residue was removed, remaining unreacted lead sulphate in the leached residue. The leaching efficiency of zinc in zinc leaching residue reached 94.2%. The results suggest that copper powder enhanced facile and efficient zinc extraction from zinc ferrite without concentrated acid, high temperature, long reaction time and specific investment. The recyclability of copper and its intrinsic commodity value showed the potential application in industrial zinc and iron containing wastes.

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confidence: 99%

A novel leaching process of zinc ferrite and its application in the treatment of zinc leaching residue

Zhang,

Wang,

et al. 2024

J. Phys.: Conf. Ser.

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

Nadirov

Karamyrzayev

2022

Mining, Metallurgy & Exploration

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TGA Kinetic Analyses of Zinc Ferrite Reduction with H2

Kashyap

Karumb²,

Taylor

2022

Mining, Metallurgy & Exploration

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Application of zinc ferrite reduction in the extraction of Zn, Ga and In from zinc refinery residue

Cited by 13 publications

References 37 publications

A novel leaching process of zinc ferrite and its application in the treatment of zinc leaching residue

A novel leaching process of zinc ferrite and its application in the treatment of zinc leaching residue

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

TGA Kinetic Analyses of Zinc Ferrite Reduction with H2

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