The solubility of palladium in the FeOx-SiO2 slags at 1573K

Ryo Ogasawara, Hidehiro Sekimoto, Katsunori Yamaguchi

Research output: Contribution to conferencePaper

Abstract

There is an increasing trend in the copper smelters to recycle electronic materials, which contain relatively high concentration of platinum group metals. Platinum group metals lost in the slag is increasing with increasing of treated scrap amount. To determine the portion of the platinum group metals chemically dissolved in the slag will be a key factor to improve the recovery of those metals. An experimental study was carried out to determine the solubility of palladium in the FeOx-SiO2 slag equilibrated with a pure palladium and the liquid Cu-Pd alloy at 1573 K and the range of oxygen partial pressure from 10-9 to 10-7. The solubility of palladium in the slag tends to increase with increasing oxygen partial pressure and content of copper in the slag. Based on the measured palladium solubility, activity coefficients of palladium oxide in the FeOx-SiO2 slag were derived. The activity coefficients decrease with increasing copper contents in the slag. Therefore, lower copper content in the slag tend to lower precious metals dissolution in the slag.

Original languageEnglish
Publication statusPublished - 2017 Jan 1
Event14th International Symposium on East Asian Resources Recycling Technology, EARTH 2017 - Sapporo, Hokkaido, Japan
Duration: 2017 Sep 262017 Sep 29

Conference

Conference14th International Symposium on East Asian Resources Recycling Technology, EARTH 2017
CountryJapan
CitySapporo, Hokkaido
Period17/9/2617/9/29

Keywords

  • Activity coefficient
  • Cu-Pd alloy
  • Platinum group metals
  • Slag loss

ASJC Scopus subject areas

  • Environmental Science(all)

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  • Cite this

    Ogasawara, R., Sekimoto, H., & Yamaguchi, K. (2017). The solubility of palladium in the FeOx-SiO2 slags at 1573K. Paper presented at 14th International Symposium on East Asian Resources Recycling Technology, EARTH 2017, Sapporo, Hokkaido, Japan.