Assessment of P2O5 Activity Coefficients in Molten Slags.

• Turkdogan E. T.

  Consultant: Pyrometallurgy & Thermochemistry.

Abstract

From a critical review of the existing experimental data, the free energy equations are presented. A new estimate is made of the standard free energy of formation of the hypothetical pure liquid P₂O₅, which is used in calculating the P₂O₅ activity coefficients from the experimental data of independent studies of slag–metal reactions. It is found that in low P₂O₅ slags, log( γ_P₂O₅) is a linear function of CaO from 0 to 60%, independent of temperature. Whereas, in slags containing P₂O₅ > 10%, log(γ_P₂O₅) is a linear function of CaO content > 40% only and increases with an increasing temperature. A novel concept of a slag–P₂O₅ emf sensor is presented for experimental evaluation.

Journal

• ISIJ International

  ISIJ International 40 (10), 964-970, 2000

  The Iron and Steel Institute of Japan

Keywords

• Free energies of calcium phosphates and P₂O₅
• P₂O₅ activity coefficients in slags
• Slag–P₂O₅ sensor
• Phosphate capacity of slags
• Lime1calcium phosphate saturated slags

Details

• CRID: 1390282681430899328
• NII Article ID: 10004837221
• NII Book ID: AA10680712
• DOI: 10.2355/isijinternational.40.964
• COI: 1:CAS:528:DC%2BD3cXosVKgs7o%3D
• ISSN: 13475460
• ISSN: 09151559
• ISSN: http://id.crossref.org/issn/09151559
• ISSN: http://id.crossref.org/issn/00211583
• Web Site: http://www.jstage.jst.go.jp/article/isijinternational1989/40/10/40_10_964/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed