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Using of leaching reactant obtained from mill scale in hydrometallurgical copper extraction

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Abstract

This study, which covered a set of leaching processes at a few stages, investigated the inclusion of iron found in mill scale, which is a waste of the iron-steel industry, in the solution as FeClx=2,3 in the presence of HCl and the conditions of using this solution with an oxidizing character in extraction of metals from chalcopyrite concentrate. Mill scale was treated with HCl, and an FeClx solution was obtained at a 100% Fe solubility and 83.43% Fe3+ conversion rate in the conditions of 60 min, 105 °C, 7 M HCl, and 1/10 solid-liquid ratio. This solution that was obtained was later used in copper extraction from a chalcopyrite concentrate. In the optimum conditions (120 min of leaching time, 105 °C of leaching temperature, 1/25 solid-liquid ratio, 400 rpm stirring speed), 95.04% of the copper was taken into the solution. In the leaching experiment in a medium containing mill scale + chalcopyrite and HCl at the same time, under the optimum conditions (120 min of leaching time, 105 °C of leaching temperature, 7 M HCl concentration, 1 g chalcopyrite concentrate, 1/25 solid-liquid ratio, 5 g mill scale, 400 rpm stirring speed), approximately 96% of copper was taken into the solution.

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Acknowledgements

The authors would like to acknowledge the Research Foundation of Fırat University under project no FUBAP-MF.18.32 for supporting the study.

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Authors and Affiliations

  1. Department of Metallurgical and Materials Engineering, Fırat University, 23119, Elazig, Turkey

    Hasan Nizamoğlu & Mehmet Deniz Turan

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  1. Hasan Nizamoğlu
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  2. Mehmet Deniz Turan
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Contributions

Authors’ contribution to the article is half. Hasan Nizamoğlu contributed to 50% of all study as they perform experimental works and writing. Mehmet Deniz Turan contributed to 50% of all study as they perform experimental works and writing.

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Correspondence to Mehmet Deniz Turan.

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Nizamoğlu, H., Turan, M.D. Using of leaching reactant obtained from mill scale in hydrometallurgical copper extraction. Environ Sci Pollut Res 28, 54811–54825 (2021). https://doi.org/10.1007/s11356-021-14399-z

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  • DOI: https://doi.org/10.1007/s11356-021-14399-z

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