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Journal of Materials Science

, Volume 28, Issue 17, pp 4562–4570 | Cite as

A crystal phase study of zinc hydroxide chloride in electric-arc-furnace dust

  • Chung-Lee Li
  • Min-Shing Tsai
Papers

Abstract

Chemical analysis shows that electric-arc-furnace (EAF) dust obtained from 13 steelmaking factories in Taiwan is composed chiefly of Fe (15–37%), Zn (7–28%) and Mn (1.55–3.99%) and that the mineral composition is mainly (Mn, Zn) Fe2O4, ZnO and ZnCl2·4Zn(OH)2·H2O. It was also found that EAF dust exists as irregular agglomerates from 3 to 20 μm in size and are made up of much smaller round particles from 0.3 to 1 μm in size. ZnCl2 gas in the dust condenses after passing through the EAF gas-cooler system binding small particles of Mn-Zn ferrite together. The agglutinative substance was identified as being ZnCl2·4Zn(OH)2·H2O possibly arising from the interaction between ZnCl2 and ZnO adhering to the Mn-Zn ferrite particles; a conjecture supported by the fact that EAF dust dissolves easily in hydrochloricacid solution leaving only loosely aggregated Mn-Zn ferrite material.

Keywords

Dust Ferrite Fe2O4 ZnCl2 Mineral Composition 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Chapman & Hall 1993

Authors and Affiliations

  • Chung-Lee Li
    • 1
  • Min-Shing Tsai
    • 1
  1. 1.Institute of Minerals, Metallurgy and Materials ScienceNational Cheng-Kung UniversityTainanTaiwan

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