論文

査読有り 筆頭著者 本文へのリンクあり
2021年2月2日

Flotation of Seafloor Massive Sulfide Ores: Combination of Surface Cleaning and Deactivation of Lead-Activated Sphalerite to Improve the Separation Efficiency of Chalcopyrite and Sphalerite

Metals
  • Kosei Aikawa
  • ,
  • Mayumi Ito
  • ,
  • Atsuhiro Kusano
  • ,
  • Ilhwan Park
  • ,
  • Tatsuya Oki
  • ,
  • Tatsuru Takahashi
  • ,
  • Hisatoshi Furuya
  • ,
  • Naoki Hiroyoshi

11
2
開始ページ
253
終了ページ
253
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.3390/met11020253
出版者・発行元
MDPI AG

The purpose of this study is to propose the flotation procedure of seafloor massive sulfide (SMS) ores to separate chalcopyrite and galena as froth and sphalerite, pyrite, and other gangue minerals as tailings, which is currently facing difficulties due to the presence of water-soluble compounds. The obtained SMS ore sample contains CuFeS2, ZnS, FeS2, SiO2, and BaSO4 in addition to PbS and PbSO4 as Pb minerals. Soluble compounds releasing Pb, Zn2+, Pb2+, and Fe2+/3+ are also contained. When anglesite co-exists, lead activation of sphalerite occurred, and thus sphalerite was recovered together with chalcopyrite as froth. To remove soluble compounds (e.g., anglesite) that have detrimental effects on the separation efficiency of chalcopyrite and sphalerite, surface cleaning pretreatment using ethylene diamine tetra acetic acid (EDTA) was applied before flotation. Although most of anglesite were removed and the recovery of chalcopyrite was improved from 19% to 81% at 20 g/t potassium amyl xanthate (KAX) after EDTA washing, the floatability of sphalerite was not suppressed. When zinc sulfate was used as a depressant for sphalerite after EDTA washing, the separation efficiency of chalcopyrite and sphalerite was improved due to deactivation of lead-activated sphalerite by zinc sulfate. The proposed flotation procedure of SMS ores—a combination of surface cleaning with EDTA to remove anglesite and the depression of lead-activated sphalerite by using zinc sulfate—could achieve the highest separation efficiency of chalcopyrite and sphalerite; that is, at 200 g/t KAX, the recoveries of chalcopyrite and sphalerite were 86% and 17%, respectively.

リンク情報
DOI
https://doi.org/10.3390/met11020253 本文へのリンクあり
URL
https://www.mdpi.com/2075-4701/11/2/253/pdf
ID情報
  • DOI : 10.3390/met11020253
  • eISSN : 2075-4701

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