Thermodynamic Study on MnO Behavior in MgO-saturated Slag Containing FeO

Sung Mo Jung, Seon Hyo Kim, Chang Hee Rhee, Dong Jun Min

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)


In order to understand the behavior of manganese oxide in smelting reduction process, the manganese equilibrium between ironmaking slag containing FeO and silver melt was investigated over the temperature range of 1 400-1 500°C. The oxygen partial pressure was controlled by CO/CO2 ratio. Test results on Mn content in silver have been thermodynamically converted into those in supercooled or carbon-saturated iron melts and the activity coefficient of MnO in slag was determined experimentally. The activity of MnO decreased with increasing FeO content in slag. Higher FeO content as well as lower slag basicity resulted in larger equilibrium manganese distribution ratio between slag and iron. The temperature dependence of equilibrium manganese distribution was determined in the temperature range of 1400-1500°C. The relative partial molar heats of solution of MnO and Mn were also experimentally determined.

Original languageEnglish
Pages (from-to)1049-1054
Number of pages6
JournalISIJ International
Issue number10
Publication statusPublished - 1993

All Science Journal Classification (ASJC) codes

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


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