A Novel Process for Extracting Precious Metals from Spent Mobile Phone PCBs and Automobile Catalysts

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  • Kim Byung-Su
    Korea Institute of Geoscience and Mineral Resources (KIGAM), Mineral Resources Research Division, Rare Metals Research Center, Urban Mine Research Team
  • Lee Jae-Chun
    Korea Institute of Geoscience and Mineral Resources (KIGAM), Mineral Resources Research Division, Rare Metals Research Center, Urban Mine Research Team
  • Jeong Jinki
    Korea Institute of Geoscience and Mineral Resources (KIGAM), Mineral Resources Research Division, Rare Metals Research Center, Urban Mine Research Team
  • Yang Dong-Heo
    Korea Institute of Geoscience and Mineral Resources (KIGAM), Mineral Resources Research Division, Rare Metals Research Center, Urban Mine Research Team
  • Shin Doyun
    Korea Institute of Geoscience and Mineral Resources (KIGAM), Mineral Resources Research Division, Rare Metals Research Center, Urban Mine Research Team
  • Lee Kang-In
    Korea Institute of Geoscience and Mineral Resources (KIGAM), Mineral Resources Research Division, Rare Metals Research Center, Urban Mine Research Team

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A novel process to simultaneously extract the precious metals such as gold, silver, platinum, palladium and rhodium from spent mobile phone printed circuit boards (PCBs) and honeycomb-type auto catalysts by smelting using waste-copper slag without adding any collector metals or by-products such as dross, matte and slime has been developed. In the process, waste-copper slag which is an industrial waste discharged from copper smelter is used not only as a flux for controlling slag composition, but also as a collector metal for capturing precious metals, and a plastic component contained in spent mobile phone PCBs is done as a reducing agent of iron oxides contained in the waste-copper slag. Using the developed process, up to 95% of gold, silver, platinum, palladium and rhodium contained in the raw materials were extracted in a Cu–Fe–Sn alloy phase, respectively.

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