New EAF dust treatment process for co-production of metallic zinc and calcium-ferrite

Shunsuke Koide, Hitoshi Mizuno, Kazuyoshi Yamaguchi, Fumio Tanno, Tetsuya Nagasaka

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In the electric arc furnace (EAF) steelmaking industry, dust treatment is one of the most serious issues worldwide due to its high costs and environmental burden, and thus this critical problem must be solved for sustainability of steel industry. A bench-scale investigation has been conducted where CaO and coal-added EAF dust was heated at around 1,000 degrees C to convert ZnFe2O4 into ZnO and Ca2Fe2O5, and formed ZnO was reduced. Evaporated zinc was collected as crude ZnO and after the halogen removal process, ZnO was supplied to carbothermic reduction process under reduced pressure. Finally, high-purity metallic zinc was successfully recovered.

Original languageEnglish
Title of host publicationAISTech 2021 - Proceedings of the Iron and Steel Technology Conference
PublisherAssociation for Iron and Steel Technology
Pages1367-1376
Number of pages10
ISBN (Electronic)9781935117933
DOIs
Publication statusPublished - 2021
EventAISTech 2021 Iron and Steel Technology Conference - Nashville, United States
Duration: 2021 Jun 292021 Jul 1

Publication series

NameAISTech - Iron and Steel Technology Conference Proceedings
Volume2021-June
ISSN (Print)1551-6997

Conference

ConferenceAISTech 2021 Iron and Steel Technology Conference
Country/TerritoryUnited States
CityNashville
Period21/6/2921/7/1

Keywords

  • Calcium ferrite
  • EAF dust
  • Electric arc furnace
  • Steel scrap
  • Zinc
  • Zinc ferrite

ASJC Scopus subject areas

  • Industrial and Manufacturing Engineering

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