Analysis of trajectory for ground printed wiring boards on shape separator.

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  • OHYA H.
    National Institute for Resources and Environment
  • KOYANAKA S.
    National Institute for Resources and Environment
  • ENDOH S.
    National Institute for Resources and Environment
  • IWATA H.
    MTA MUKKI, Research Institute of Chemical Engineering
  • IZUMIKAWA C.
    Reserch Institute for Environmental Engineering, Dowa Mining CO. LTD.
  • SASAKI O.
    Reserch Institute for Environmental Engineering, Dowa Mining CO. LTD.
  • DITL P.
    Czech Technical University

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Other Title
  • Analysis of Trajectory for Ground Print

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Abstract

The total amount of printed wiring boards scrap generated in 1988 reached to 50 billion tons in Japan. When a hummer impact mill was used in grinding them, copper was liberated from other materials and the shapes of individual products were able to be controlled at the same time.<BR>An inclined conveyor was developed for the purpose of particle shape separation in our laboratory, which was characterized for the possibility of processing a large amount of feed materials. We tried to separate spherical copper from ground printed wiring boards.<BR>The belt speed was not effected so much and the optimum inclination angle was 30°for recovery of copper. In this case, the copper concentration of the separated product was more than 70%, the recovery of copper was more than 80%, and the Newton's separation efficiency was about 65%.

Journal

  • RESOURCES PROCESSING

    RESOURCES PROCESSING 44 (1), 3-8, 1997

    The Resources Processing Society of Japan

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