Concentration of rare metals from printed wiring board of small electronic appliances

Shuji Owada, Sou Kageyama, Chikako Koga, Akira Otsuki, Chiharu Tokoro

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

    1 Citation (Scopus)

    Abstract

    A new resources recycling system is proposed, the concept of "Reserve of (waste) to Stock (RtoS)" to create "Artificial Resources Deposit", which involves collection of wasted home electronic appliances from citizens, disassembly of electronic devices, concentration of rare metals in the devices, extraction of rare metals from the concentrate, and also proposing the stock system of the concentrates, for recovering rare metals from the scrap devices in the future. In especial, the target material in the paper was scrap mobile phones, which contain considerable amounts of common, precious and rare metals. The former two kinds of metals have been almost recovered by various pyro-and hydrometallurgical processes. However, most of the rare metals, essential to produce modern electronic devices, are usually discarded every year, which cannot be recovered by conventional nonferrous metals smelting and refining processes. This paper describes the possibility to concentrate the rare metals in electronic devices by application of comminution and physical separation technologies, followed by the application of some novel metallurgical processes to extract them. It is intended to combine (1) comminution to liberate installed devices by a new method and (2) various physical separation techniques to separate electronic parts from each other ("parts separation") and to separate comminuted particles by their composition ("powder separation"). Several kinds of rare metals have been concentrated by the above process which will be expected to be stocked.

    Original languageEnglish
    Title of host publicationProceedings - European Metallurgical Conference, EMC 2009
    Pages149-160
    Number of pages12
    Volume1
    Publication statusPublished - 2009
    Event5th European Metallurgical Conference, EMC 2009 - Innsbruck
    Duration: 2009 Jun 282009 Jul 1

    Other

    Other5th European Metallurgical Conference, EMC 2009
    CityInnsbruck
    Period09/6/2809/7/1

    Fingerprint

    Printed circuit boards
    Metals
    Comminution
    Nonferrous metals
    Smelting
    Mobile phones
    Powders
    Refining
    Recycling
    Deposits
    Chemical analysis

    Keywords

    • Electronic appliances
    • Printed wiring boards
    • Rare metals
    • Recycling
    • WEEE pyro-and hydrometallurgy

    ASJC Scopus subject areas

    • Metals and Alloys

    Cite this

    Owada, S., Kageyama, S., Koga, C., Otsuki, A., & Tokoro, C. (2009). Concentration of rare metals from printed wiring board of small electronic appliances. In Proceedings - European Metallurgical Conference, EMC 2009 (Vol. 1, pp. 149-160)

    Concentration of rare metals from printed wiring board of small electronic appliances. / Owada, Shuji; Kageyama, Sou; Koga, Chikako; Otsuki, Akira; Tokoro, Chiharu.

    Proceedings - European Metallurgical Conference, EMC 2009. Vol. 1 2009. p. 149-160.

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

    Owada, S, Kageyama, S, Koga, C, Otsuki, A & Tokoro, C 2009, Concentration of rare metals from printed wiring board of small electronic appliances. in Proceedings - European Metallurgical Conference, EMC 2009. vol. 1, pp. 149-160, 5th European Metallurgical Conference, EMC 2009, Innsbruck, 09/6/28.
    Owada S, Kageyama S, Koga C, Otsuki A, Tokoro C. Concentration of rare metals from printed wiring board of small electronic appliances. In Proceedings - European Metallurgical Conference, EMC 2009. Vol. 1. 2009. p. 149-160
    Owada, Shuji ; Kageyama, Sou ; Koga, Chikako ; Otsuki, Akira ; Tokoro, Chiharu. / Concentration of rare metals from printed wiring board of small electronic appliances. Proceedings - European Metallurgical Conference, EMC 2009. Vol. 1 2009. pp. 149-160
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