THE EFFECTS OF MICROWAVE-ASSISTED LEACHING ON THE TREATMENT OF ELECTRIC ARC FURNACE DUSTS (EAFD)

Laubertova M., Havlik T., Parilak L., Derin C. B., Trpcevska J.

ARCHIVES OF METALLURGY AND MATERIALS, vol.65, no.1, pp.321-328, 2020 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 65 Issue: 1
  • Publication Date: 2020
  • Doi Number: 10.24425/amm.2020.131733
  • Journal Name: ARCHIVES OF METALLURGY AND MATERIALS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Communication Abstracts, Compendex, Metadex, Directory of Open Access Journals, Civil Engineering Abstracts
  • Page Numbers: pp.321-328
  • Keywords: microwave energy, leaching, industrial waste, EAF dust, DIELECTRIC CHARACTERIZATION, ZINC RECOVERY, IRON
  • Istanbul Technical University Affiliated: Yes

Abstract

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.