Synthesis of ZnO nanoparticles from electric arc furnace dust
J. Min. Metall. Sect. B-Metall., 58 (2) (2022) 253-260 DOI:10.2298/JMMB211029008B
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Available online 24 May 2022
(Received 29 October 2021; Accepted 23 May 2022)
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Abstract
This paper presents a hydrometallurgical treatment of electric arc furnace (EAF) dust which was taken from a Vietnamese steelmaking plant to obtain zinc oxide (ZnO) nanoparticles by using aqueous ammoniac carbonate solution as a leaching agent. Characterization of the EAF dust was conducted by XRD technique, SEM observation, and manual wet chemical analysis. The results showed that total zinc (Zn) of the dust was 42.69 wt.% and existed mainly in the forms of zincite – ZnO, simonkolleite – Zn5(OH)8Cl2H2O, and franklinite – ZnFe2O4. The leached condition, in which the ammoniac carbonate concentration was 300 g/l and the time was 90 minutes, was found to provide the highest leaching efficiency as of 85.29 % when the temperature was fixed at 60 oC and the ratio of solid/liquid was 1/6. After some steps of the subsequent treatment, the ZnO nanoparticles with the purity of 99.5 % and the size of 100 nm were obtained from thermal decomposition of zinc carbonate hydroxide – Zn5(CO3)2(OH)6.
Keywords: EAF dust; Hydrometallurgy; Zincite; Franklinite; ZnO nanoparticles
Correspondence Address:
A.-H. Bui,
Hanoi University of Science and Technology,
School of Materials Science and Engineering, Hanoi, Vietnam,
email: hoa.buianh@hust.edu.vn
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