Thermodynamic Considerations for Eliminating P and Si from Molten Copper by Na2CO3–Based Slag

Gerardo Raul Alvear, Kenji Mizuno, Hiroyuki Fukuyama, Toshiharu Fujisawa, Chikabumi Yamauchi

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Thermodynamic properties of NaO0.5-CO2–XOv/2 slag (X: P or Si, v: valence of X) have been investigated by conducting the following measurements: (1) Solubility measurements of Na3PO4 (s) into sodium carbonate melts at 1423 to 1523 K under various partial pressures of CO2 and oxygen. (2) Activity measurements of NaO0.5 under various partial pressures of CO2. (3) Solubility measurements of CO2 in the slags. Based on the results, the equilibrium distribution ratios of P and Si between the slags and the molten copper have been estimated as a function of partial pressures of CO2 and oxygen and the slag composition at 1523 K.

Original languageEnglish
Pages (from-to)48-55
Number of pages8
JournalMaterials Transactions, JIM
Volume36
Issue number1
DOIs
Publication statusPublished - 1995 Jan 1
Externally publishedYes

Keywords

  • NaPO
  • PO
  • SiO
  • activity
  • copper
  • distribution ratio
  • phosphorus
  • silicon
  • sodium carbonate slag
  • thermodynamics

ASJC Scopus subject areas

  • Engineering(all)

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