Production of Mn-Fe alloy from slag generated in Mn-removal treatment of molten cast iron

Takahito Takagawa, Shigeru Ueda, Hiroyuki Ike, Kouji Iwashimizu, Ryo Inoue

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

Production of Fe-Mn alloy from the slag generated in the Mn-removal treatment of cast iron was investigated by using the method of carbon reduction of FeO-Si02-MnO and FeO-Si02-MnO-CaO slags at 1 723 K. In the first stage, almost all the Fe was reduced from the slags, followed by the reduction of Si and Mn Finally, Fe-Mn-Si metal was obtained as a result of the reduction treatment. The addition of CaO to the FeO-Si02-MnO slag had two effects: (1) the slag viscosity decreased, thereby improving slag reactivity, and (2) the Si02 activity in the slag melt decreased, thereby lowering the Si content in the metal. It was confirmed that the reaction between carbon and the slag is rate limiting reaction. The contact condition between the slag and carbon has a significant influence on the slag reactivity; improvement of the contact condition leads to an increase in the slag reactivity.

Original languageEnglish
Pages (from-to)1673-1677
Number of pages5
JournalIsij International
Volume49
Issue number11
DOIs
Publication statusPublished - 2009

Keywords

  • Carbon reduction
  • Cast iron
  • Ferromanganese
  • Mn-Fe alloy
  • Removal of manganese
  • Slag treatment

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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