キルン焼成法による焼却炉飛灰中各種金属の揮発分離技術 Analysis of Reaction and Mechanism in Heavy Metal Volatilization of Incinerator Fly Ash Roasting

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A novel detoxification process for incinerator fly ash was proposed, and the removal mechanism of heavy metals from the fly ash was investigated. The process comprises of roasting the fly-ash extrudates with a rotary kiln, and removes heavy metals by chloridizing volatilization, giving harmless resultant extrudates which contain immobilized heavy metals at trace concentration. The developed roasting technique was unique, as it utilized chlorine originally contained in the fly ash and did not need additional chlorine source. Our detailed investigation proved that appropriate control of bed layer in the kiln could keep reductive atmosphere that should enhance volatilization of metals at either chloride or metals form.<BR>The extrudates derived from the process, compared to conventional chelate-solidified ash or to melting solid matter, showed less metals elution at leachate test, as well as contained descended metals content which satisfied the soil environmental standards revised recently.

収録刊行物

  • 資源と素材 : 資源・素材学会誌 : journal of the Mining and Materials Processing Institute of Japan

    資源と素材 : 資源・素材学会誌 : journal of the Mining and Materials Processing Institute of Japan 120(9), 521-526, 2004-09-25

    一般社団法人 資源・素材学会

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各種コード

  • NII論文ID(NAID)
    10013560658
  • NII書誌ID(NCID)
    AN10062646
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    09161740
  • NDL 記事登録ID
    7104570
  • NDL 雑誌分類
    ZP41(科学技術--金属工学・鉱山工学)
  • NDL 請求記号
    Z17-315
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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