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 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 in which CaO and coal-added EAF dust was heated at around 1,000°C to convert ZnFe2O4 into ZnO and Ca2Fe2O5, and formed ZnO was reduced. Evaporated zinc was collected as crude ZnO and after the halogens 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 publicationProceedings of the Iron and Steel Technology Conference, AISTech 2020
PublisherIron and Steel Society
Pages61-70
Number of pages10
ISBN (Electronic)9781935117872
DOIs
Publication statusPublished - 2020
EventAISTech 2020 Iron and Steel Technology Conference - Cleveland, United States
Duration: 2020 Aug 312020 Sep 3

Publication series

NameAISTech - Iron and Steel Technology Conference Proceedings
Volume1
ISSN (Print)1551-6997

Conference

ConferenceAISTech 2020 Iron and Steel Technology Conference
CountryUnited States
CityCleveland
Period20/8/3120/9/3

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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