Solubility of MgO in CaO-SiO2-MnO slags

Sung Mo Jung, Dong Joon Min, Chang Hee Rhee

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Abstract

The slag/metal equilibrium experiment was conducted to measure the activity of Mn oxide in simplest lime-based slags elucidating the reduction behavior of MnO and to derive a correlation between the MgO solubility and optical basicity. A slag containing Mn oxide was brought into equilibrium with molten copper in a Mg oxide crucible and the activity of Mn oxide in slags was determined by measuring Mn content in Cu in equilibrium with the slags in a CO/CO 2gas mixture. Highly dense electronically sintered MgO crucibles were used forming a solid solution of MnO in MgO at the slag/crucible interface. The solubility of MgO was limited by the saturation of the slag with MgO and MnO solid solutions and was related to the activity of MgO. It was observed that the CaO had a greater influence on the MgO solubility than MnO, which was explained by the relativity basicity of oxides based on the optical basicity concept.

Original languageEnglish
Pages (from-to)1823-1825
Number of pages3
JournalISIJ International
Volume47
Issue number12
DOIs
Publication statusPublished - 2007 Dec 1

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All Science Journal Classification (ASJC) codes

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

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