The Effects of Microwave-Assisted Leaching on the Treatment of Electric Arc Furnace Dusts (EAFD)

In this study, laboratory-scale experiments were carried out to investigate the effects of microwave-assisted alkaline leaching on the treatment of electric arc furnace dusts to recover zinc and lead. Microwave treatment is a new innovative technology in waste treatment and now is an attractive adva...

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Bibliographic Details
Published inArchives of metallurgy and materials Vol. 65; no. 1; pp. 321 - 328
Main Authors Laubertova, M, Havlik, T, Parilak, L, Derin, B, Trpcevska, J
Format Journal Article
LanguageEnglish
Published Warsaw Polish Academy of Sciences 01.01.2020
Subjects
Acids
Alkaline leaching
Caustic soda
Dust
eaf dust
Electric arc furnaces
Flue dust
industrial waste
leaching
Metals
microwave energy
Mineralogy
Morphology
R&D
Radiation
Research & development
Sodium hydroxide
Spectrum analysis
Steel production
Waste treatment
Zinc
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Summary:In this study, laboratory-scale experiments were carried out to investigate the effects of microwave-assisted alkaline leaching on the treatment of electric arc furnace dusts to recover zinc and lead. Microwave treatment is a new innovative technology in waste treatment and now is an attractive advanced inter-disciplinary field and also environmental friendly. The highest zinc extraction, 50.3% in 60 minutes using 5 M NaOH at 750 W and L:S ratio 20, and lead extraction up to 92.84% was achieved in these same conditions but in 30 minutes. Compared with conventional leaching, the top extraction rate using MW-assisted leaching was higher by 16% (Zn) and 26% (Pb). Zinc presents in the flue dust in the form of franklinite (ZnFe2O4), its leaching in sodium hydroxide does not occur under the examined conditions, because it is enclosed in a matrix of iron.
ISSN:1733-3490
2300-1909
DOI:10.24425/amm.2020.131733