Resources Recycling (자원리싸이클링)

The Korean Institute of Resources Recycling (한국자원리싸이클링학회)
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Characteristic of Flotation for Recovery of Copper from Copper Slag in Kazakhstan

카자흐스탄 구리제련소 슬래그 내 구리회수를 위한 선별 특성

  • Park, Jayhyun (Mine Reclamation Corporation Institute of Mine Reclamation Technology) ;
  • Choi, Uikyu (Mine Reclamation Corporation Institute of Mine Reclamation Technology) ;
  • Choe, Hongil (Mine Reclamation Corporation Institute of Mine Reclamation Technology) ;
  • Shin, Shunghan (Mine Reclamation Corporation Institute of Mine Reclamation Technology)
  • 박제현 (한국광해관리공단 광해기술연구소) ;
  • 최의규 (한국광해관리공단 광해기술연구소) ;
  • 최홍일 (한국광해관리공단 광해기술연구소) ;
  • 신승한 (한국광해관리공단 광해기술연구소)
  • Received : 2015.04.10
  • Accepted : 2015.08.06
  • Published : 2015.08.31
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Abstract

Almost all copper slags contain a considerable amount of Cu (0.5 - 3.7%) close to or even higher than copper ores. A number of methods for metal recovery from copper slag were reported These methods can be classified into three categories, flotation, leaching and roasting. Sulfide flotation method for the recovery of copper from Kazahstan copper furnace slag is discussed in this investigation. 50% of copper from the slag was recovered by sulfide flotation at pH 4. meanwhile 67% of copper from the slag was recovered at pH 11. Higher copper recovery result at pH 11 rather than that at pH 4 was caused by the fact that copper sulfides were floated in particle size fraction over $100{\mu}m$ in concentrates at pH 11. When the slag were ground below $74{\mu}m$by ball milling, the recovery of copper by floation in slag improved to 78 - 83% because of copper liberation effect.

일반적으로 구리제련 슬래그내 구리함량은 0.5-3.7% 혹은 그 이상의 높은 비율로 포함되어 있며, 슬래그내 구리회수에 대한 대표적인 방법으로는 부유선별, 침출 그리고 배소가 있다. 본 연구에서는 부유선별법에 의한 구리 회수방법을 검토하였으며, 잔세이트포수제를 이용한 황화부선을 수행하였다. 산성과 알칼리 조건에서 부유선별 특성을 관찰하였으며, pH 4 에서 구리회수율 50%, pH 11 에서 구리회수율 67%로 나타났으며, 특히 pH 11에서는 $100{\mu}m$ 이상의 입자가 정광으로 부유되어 회수율이 상대적으로 높게 나타나는 경향을 보였다. 슬래그 입도를 200 mesh 이하로 분쇄하여 단체분리도를 향상시켜 pH조건별 부유선별 실험을 수행한 결과, 회수율이 78 - 83%까지 향상되는 것을 확인할 수 있었다.

Keywords

References

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