The effect on copper leaching from chalcopyrite concentrates by ball milling

Yugo Mitani, Chiharu Tokoro

    研究成果: Conference contribution

    抄録

    In recent years, efficient production method for low grade copper ore is increasingly required because the quality of copper ore is decreasing. Objective of this study was enhancement of sulfuric acid leaching of copper using ball milling. To accomplish this, optimum conditions of solid/liquid ratio of slurry, air volume in the mill, rotation speed and ball diameter were investigated for copper leaching from copper concentrate in which pyrite and chalcopyrite were dominant components. As a result, final copper recovery after 24 hour was increased to over 30 wt% when ball milling and leaching were conducted at once in the optimum conditions; 60 rpm of rotational speed, 15 mm of ball diameter, 0.5 wt% of slurry concentration and 85 vol% of air volume, whereas it remained 14 wt% by simple beaker leaching test. This increase of copper recovery could not be achieved in wet ball milling using water followed by sulfuric leaching using beaker. Furthermore, two-step leaching, that is, dry ball milling followed by sulfuric leaching using beaker, was also tried. As a result, final copper recovery was raised to 80 wt% because chalcopyrite in copper ore was oxidized and easily leached out after dry ball milling in 24 hours.

    本文言語English
    ホスト出版物のタイトルEARTH 2015 - Proceedings of the 13th International Symposium on East Asian Resources Recycling Technology
    出版社International Symposium on East Asian Resources Recycling Technology
    ページ339-345
    ページ数7
    出版ステータスPublished - 2015
    イベント13th International Symposium on East Asian Resources Recycling Technology, EARTH 2015 - Pattaya, Thailand
    継続期間: 2015 11 12015 11 4

    Other

    Other13th International Symposium on East Asian Resources Recycling Technology, EARTH 2015
    国/地域Thailand
    CityPattaya
    Period15/11/115/11/4

    ASJC Scopus subject areas

    • 環境科学(全般)

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