Distribution ratios of platinum group metals between the Al 2O3-CaO-SiO2 Slag and molten iron at 1873K

Katsunori Yamaguchi, Hidehiro Sekimoto, Toshiko Kon, Akira Ishizaka, Toshiaki Yoshida, Takeaki Honda

Research output: Contribution to conferencePaper

Abstract

Gasoline vehicles are fitted with three-way catalytic converters containing platinum group metals (PGMs) such as platinum, palladium and rhodium. In future, many countries will also adopt stringent vehicle emission regulations that in effect require the three-way automotive catalytic converters. Therefore recovery process of PGMs from the autocatalyst is very important. PGMs recycling process, which is used molten iron as metallic solvent to concentrate the PGM from the three-way automotive catalytic converters, has been operated. A fundamental study of the recycling process was carried out to recover the PGMs from the three-way autocatalyst. Distribution ratios of platinum, palladium and rhodium between the Al2O3-CaO-SiO2 slag and molten iron or carbon saturated iron were measured at 1873 K. Distribution ratios of PGMs between the slag and the liquid iron and the carbon saturated molten iron were from 1×10-6 to 5×10-5. Based on the distribution ratios, recovery of platinum, palladium and rhodium using the molten iron as metallic solvent is determined at 1873 K. We found that PGMs is enriched to the molten iron or the carbon saturated iron and the slag loss of PGMs is negligible small.

Original languageEnglish
Pages267-276
Number of pages10
Publication statusPublished - 2013 Oct 8
Event7th European Metallurgical Conference, EMC 2013 - Weimar, Germany
Duration: 2013 Jun 232013 Jun 26

Conference

Conference7th European Metallurgical Conference, EMC 2013
CountryGermany
CityWeimar
Period13/6/2313/6/26

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Keywords

  • Distribution ratio
  • Palladium
  • Platinum
  • Pyrometallurgy
  • Recycling
  • Rhodium

ASJC Scopus subject areas

  • Metals and Alloys

Cite this

Yamaguchi, K., Sekimoto, H., Kon, T., Ishizaka, A., Yoshida, T., & Honda, T. (2013). Distribution ratios of platinum group metals between the Al 2O3-CaO-SiO2 Slag and molten iron at 1873K. 267-276. Paper presented at 7th European Metallurgical Conference, EMC 2013, Weimar, Germany.