Solubility of rhodium in doré metal

K. Avarmaa, P. Taskinen*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

1 Citation (Scopus)

Abstract

The solubilities of rhodium (Rh) in a molten silver alloy in doré-smelting conditions for treating copper refinery slime at temperatures of 1,000 to 1,300 °C were measured using a high-temperature equilibration-quenching technique and direct phase analysis by electron probe X-ray microanalysis. The results obtained indicate that the solubility of rhodium in molten silver is very limited: only 0.04 to 0.26 weight percent at 1,000 and 1,300 °C, respectively. The thermodynamic properties of rhodium in molten silver were estimated from the solubility data. The compositions of the solid rhodium alloys in equilibrium with molten silver-rich doré metal were also measured in this study. The excess rhodium in the doré alloy will precipitate during the refining as solid, greater than 99 weight percent Rh.

Original languageEnglish
Pages (from-to)91-95
Number of pages5
JournalMinerals and Metallurgical Processing
Volume34
Issue number2
DOIs
Publication statusPublished - 1 May 2017
MoE publication typeA1 Journal article-refereed

Keywords

  • Anode slime treatment
  • Precious metals smelting
  • Silver
  • Thermodynamics

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