Effect of FeO and CaO on the sulfide capacity of the ferronickel smelting slag

Ki Deok Kim, Wan Wook Huh, Dong Joon Min

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16 Citations (Scopus)


The effect of FeO and CaO on the sulfide capacity in MgO-SiO 2-FeO based slags equilibrating with Fe-Ni alloys at 1773 K and 1873 K (1500 °C and 1600 °C) was investigated. The sulfide capacity in the MgO-SiO2-FeO and MgO-SiO2-CaO-FeO slags increased with higher FeO content and higher temperatures due to an increase in the activity of O2- and a decrease in the activity coefficient of sulfide ion in slag. The sulfide capacity of the MgO-SiO2-CaO-FeO slag also increased with an increase in the CaO content due largely to the increase in the activity of O2-. Furthermore, CaO and FeO seem to be more effective than MgO in increasing the sulfide capacity in the MgO-SiO2-CaO-FeO slag system. In addition, the comparison of the experimental results with the theoretical estimate using the modified empirical optical basicity showed relatively good linear agreement.

Original languageEnglish
Pages (from-to)889-896
Number of pages8
JournalMetallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science
Issue number3
Publication statusPublished - 2014 Jun

Bibliographical note

Funding Information:
This work was funded by forth stage of Brain Korea 21. This work was also partially funded by the Ministry of Knowledge Economy under Project No. 10035258. Special appreciation is warranted to Prof. I. Sohn of Yonsei University for helpful discussions.

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry


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