Elimination of As, Sb, Sn OR Fe from molten copper by using Na2CO3 slag

Hiroyuki Fukuyama, Toshiharu Fujisawa, Chikabumi Yamauchi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

A principle was established to estimate the equilibrium distribution ratio of impurity element X (As, Sb, Sn or Fe) between NaO0.5 -CO2XOv/2 slag and molten copper defined by {(mass% of X in slag) / {mass % of X in metal)}, over a wide range of the slag composition as a function of temperature and partial pressures of CO2 and oxygen. According to the principle, the following measurements were conducted on the thermodynamic properties of the slag: (1) Electrochemical measurements of activity of NaO0.5, (2) Activity measurements of XOv/2 by slag/metal equilibrium technique, (3) Solubility measurements of CO2 and (4) Redox equilibrium measurements of XOv/2 by slag/gas equilibrium technique, and (5) Determination of the equilibrium phase relationships. Based on the results, the distribution ratios of the impurity elements between the slag and molten copper could be successfully estimated. And the procedure for reducing down these impurity elements to the level of high purity copper by using Na2 CO3 slag was discussed.

Original languageEnglish
Title of host publicationFirst International Conference on Processing Materials for Properties
PublisherPubl by Minerals, Metals & Materials Soc (TMS)
Pages377-380
Number of pages4
ISBN (Print)0873392566
Publication statusPublished - 1993 Dec 1
Externally publishedYes
EventProceedings of the 1st International Conference on Processing Materials for Properties - Honolulu, HI, USA
Duration: 1993 Nov 71993 Nov 10

Other

OtherProceedings of the 1st International Conference on Processing Materials for Properties
CityHonolulu, HI, USA
Period93/11/793/11/10

ASJC Scopus subject areas

  • Engineering(all)

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    Fukuyama, H., Fujisawa, T., & Yamauchi, C. (1993). Elimination of As, Sb, Sn OR Fe from molten copper by using Na2CO3 slag. In First International Conference on Processing Materials for Properties (pp. 377-380). Publ by Minerals, Metals & Materials Soc (TMS).