流動層を用いた乾式比重分離法に関する基礎的研究  [in Japanese] A Fundamental Study of Dry Gravity Concentration Method Using Fluidized Bed  [in Japanese]

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Author(s)

    • 所 千晴 TOKORO Chiharu
    • 早稲田大学理工学部 環境資源工学科 Department of Resources and Environmental Engineering, School of Science and Engineering, Waseda University
    • 岡屋 克則 OKAYA Katsunori
    • 東京大学大学院工学系研究科 地球システム工学専攻 Department of Geosystem Engineering, Graduate School of Engineering, The University of Tokyo
    • 定木 淳 [他] SADAKI Jun
    • 東京大学大学院工学系研究科 地球システム工学専攻 Department of Geosystem Engineering, Graduate School of Engineering, The University of Tokyo
    • 劉 克俊 LIU Kejun
    • 東京大学大学院 工学系研究科 地球システム工学専攻 Department of Geosystem Engineering, Graduate School of Engineering, The University of Tokyo
    • 藤田 豊久 FUJITA Toyohisa
    • 東京大学人工物工学研究センター(工学系研究科地球システム工学専攻) Department of Geosystem Engineering, Graduate School of Engineering, The University of Tokyo

Abstract

Dry gravity concentration method using a fluidized bed is being investigated. We employ polystyrene (PS) balls and glass beads (GB) as a fluidizing medium. Pieces of corrugated cardboard, paulownia wood, polypropylene (PP), polyvinyl chloride (PVC) and Al are employed as test materials. The separation efficiency is experimented and vertical position of separated materials in the fluidization bed is simulated, by changing the superficial velocity. It is found by experiment that high recovery (>90%) of sink products and float products is achieved, even if the density difference between them is slight. These high recoveries are achievable when the superficial velocity is slightly higher than the minimum fluidization velocity.<BR>The recovery of float products is found to be sensitive to the superficial velocity: i.e., the recovery is low when the superficial velocity is either too high or too low. In order to examine the influence of the superficial velocity on the recovery of float products in detail, we employ two-dimensional simulation based on the discrete element method (DEM). The grater the superficial velocity is, the wider the vertical positioning of float materials becomes. It is found by DEM simulation that the recovery of float products tends to be low when the superficial velocity is too high, because the lowest vertical position during separation test is lower than that when the superficial velocity is optimal.<BR>It is found from these series of experiments and simulation in this study that high efficient separation by dry gravity concentration using a fluidized bed is possible.

Journal

  • Shigen-to-Sozai

    Shigen-to-Sozai 120(6), 388-394, 2004-07-25

    The Mining and Materials Processing Institute of Japan

References:  18

Codes

  • NII Article ID (NAID)
    10013341915
  • NII NACSIS-CAT ID (NCID)
    AN10062646
  • Text Lang
    JPN
  • Article Type
    ART
  • ISSN
    09161740
  • NDL Article ID
    7047724
  • NDL Source Classification
    ZP41(科学技術--金属工学・鉱山工学)
  • NDL Call No.
    Z17-315
  • Data Source
    CJP  NDL  J-STAGE 
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