Room Temperature Extraction of Indium from ITO Scrap by a Mechanochemical Treatment.

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  • ZHANG Qiwu
    Institute for Advanced Materials Processing, Tohoku University, Aoba–ku, Sendai 980–8577
  • AOYAGI Takeshi
    Institute for Advanced Materials Processing, Tohoku University, Aoba–ku, Sendai 980–8577
  • NAGATA Choju
    Electric Materials & Parts Laboratory, Dowa Mining Co., Ltd.
  • SAITO Fumio
    Institute for Advanced Materials Processing, Tohoku University, Aoba–ku, Sendai 980–8577

Bibliographic Information

Other Title
  • メカノケミカル処理を利用したＩＴＯスクラップからのインジウムの非加熱酸浸出
  • メカノケミカル ショリ オ リヨウ シタ ITO スクラップ カラ ノ インジウム ノ ヒカネツサン シンシュツ

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Abstract

Room temperature leaching of ITO (Indium Tin Oxide) scrap has been carried out to extract mainly indium, using H2SO4 solution of 1N, after mechanochemically treated with Al2O3 powder by means of a planetary mill. The crystallinity of In2O3 in the scrap was changed into amorphous state by the mechanochemical treatment, although In2O3 maintained the crystal structure partially even in the prolonged treatment. The degradation of crystallinity of In2O3 in the scrap resulted in easy extraction of indium at high yield in the leaching process. Al2O3 powder in the scrap plays a significant role to make In2O3 amorphous.

Journal

  • Shigen-to-Sozai

    Shigen-to-Sozai 115 (3), 185-188, 1999

    The Mining and Materials Processing Institute of Japan

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