Solubility of MgO in CaO-SiO 2 -MnO slags

Sung Mo Jung, Dong Joon Min, Chang Hee Rhee

Research output: Contribution to journalArticle

6 Citations (Scopus)

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 2 gas 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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Slags
Solubility
Oxides
Crucibles
Alkalinity
Carbon Monoxide
Solid solutions
Saturation (materials composition)
Relativity
Lime
Gas mixtures
Molten materials
Copper
Metals
Experiments

All Science Journal Classification (ASJC) codes

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

Cite this

Jung, Sung Mo ; Min, Dong Joon ; Rhee, Chang Hee. / Solubility of MgO in CaO-SiO 2 -MnO slags In: ISIJ International. 2007 ; Vol. 47, No. 12. pp. 1823-1825.
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Solubility of MgO in CaO-SiO 2 -MnO slags . / Jung, Sung Mo; Min, Dong Joon; Rhee, Chang Hee.

In: ISIJ International, Vol. 47, No. 12, 01.12.2007, p. 1823-1825.

Research output: Contribution to journalArticle

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AB - 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 2 gas 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.

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