Phase equilibrium and thermodynamic properties of SiO2-CaO- FeOx slags for copper smelting - Research achievements of professor Yoichi Takeda

Katsunori Yamaguchi, Shigeru Ueda, Yoichi Takeda

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)


Although the iron silicate slags are being widely used in extractive metallurgy, they represent some inherent inconveniences such as the loss of valuable metals and the low holding capacity for iron oxides, especially, for magnetite. In this respect, the SiO2-CaO-FeOx slags have attracted the attention as new slag systems. The late Professor Yoichi Takeda had investigated the phase relations and thermodynamic properties of the SiO2-CaO-FeOx slag systems, and his great achievements in the following studies are reviewed: (1) determination of phase relations and oxygen potential in the CaO-FeOx based slag systems, (2) activity coefficients of the slag components, (3) distribution ratio of some minor elements between the slag and copper phases in relation to the oxygen potential and (4) sulfide and oxide solubility of copper in the slags in relation to the matte grade. These results have provided very important information for use of the SiO2-CaO-FeOx slags in copper smelting and non-ferrous metallurgical processes, e.g. he had suggested the availability of these slags for smelting high-grade copper mattes.

Original languageEnglish
Pages (from-to)164-174
Number of pages11
JournalScandinavian Journal of Metallurgy
Issue number2
Publication statusPublished - 2005 Apr 1
Externally publishedYes


  • Activity coefficient
  • Copper loss
  • Copper smelting
  • Distribution ratio
  • Matte
  • Phase relation
  • Slag

ASJC Scopus subject areas

  • Metals and Alloys


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