論文

査読有り
2020年7月8日

Agglomeration–Flotation of Finely Ground Chalcopyrite Using Emulsified Oil Stabilized by Emulsifiers: Implications for Porphyry Copper Ore Flotation

Metals
  • Vothy Hornn
  • ,
  • Mayumi Ito
  • ,
  • Hiromasa Shimada
  • ,
  • Carlito Baltazar Tabelin
  • ,
  • Sanghee Jeon
  • ,
  • Ilhwan Park
  • ,
  • Naoki Hiroyoshi

10
7
開始ページ
912
終了ページ
912
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.3390/met10070912
出版者・発行元
MDPI AG

Flotation is the conventional method for processing porphyry copper deposits, one of the most economically important sources of copper (Cu) worldwide. The rapidly decreasing grade of this type of Cu ore in recent years, however, presents serious problems with fine particle recovery using conventional flotation circuits. This low recovery could be attributed to the low collision efficiency of fine particles and air bubbles during flotation. To improve collision efficiency and flotation recovery, agglomeration of finely ground chalcopyrite (CuFeS2) (D50 = 3.5 μm) using emulsified oil stabilized by emulsifiers was elucidated in this study. Specifically, the effects of various types of anionic (sodium dodecyl sulfate (SDS), potassium amyl xanthate (KAX)), cationic (dodecyl amine acetate (DAA)), and non-ionic (polysorbate 20 (Tween 20)) emulsifiers on emulsified oil stability and agglomeration–flotation efficiency were investigated. When emulsifiers were added, the average size of agglomerates increased, resulting in higher Cu recovery during flotation. This dramatic improvement in flotation efficiency could be attributed to the smaller oil droplet size in emulsified oil and their higher stability in the presence of emulsifiers. The utilization of emulsifiers during agglomeration–flotation not only lowered the required agitation strength for agglomeration but also shortened the agglomeration time, both of which made the process easier to incorporate in existing flotation circuits.

リンク情報
DOI
https://doi.org/10.3390/met10070912
URL
https://www.mdpi.com/2075-4701/10/7/912/pdf

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