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A Study of Recycling Process to Recovery Valuable Resources from Aluminum Black Dross

알루미늄 블랙드로스로부터 유가자원 회수를 위한 재활용 공정 연구

  • 강유빈 (고등기술연구원 융합소재연구센터) ;
  • 임병용 (고등기술연구원 융합소재연구센터) ;
  • 김대근 (고등기술연구원 융합소재연구센터) ;
  • 이찬기 (고등기술연구원 융합소재연구센터) ;
  • 안병두 ((주)디에스리퀴드 기술연구소) ;
  • 김용환 (한국생산기술연구원 뿌리산업기술연구소) ;
  • 이만승 (목포대학교 신소재공학과)
  • Received : 2018.08.27
  • Accepted : 2018.10.15
  • Published : 2018.10.31

Abstract

The aluminum dross is oxide generated on the surface of the molten metal during the aluminum melting process and it is divided into white dross and black dross according to presence of the Salt flux. White dross has high metal content and is recycled via the melting process. Black dross is largely berried, because the it has a low metal content and difficulty in separating the components. Black dross contains a salt components such as NaCl and KCl, and inorganic materials such as $Al_2O_3$ and MgO, and it is necessary to study the technology to recover and recycle such valuable resources. In this study, a process for recycling aluminum black dross was proposed. The inorganic and soluble substances present in the black dross were separated through crushing-dissolution-solid/liquid separation-decompression evaporating. By controlling the ratio of water and black dross, the recovery condition of the separated product was optimized and we confirmed the highest Salt flux recovery efficiency 91 wt.% at black dross:water ratio 1:9. Finally, Through the synthesis of zeolite using recovered ceramic material, the materialization possibility of black dross was confirmed.

Acknowledgement

Supported by : 한국에너지기술평가원(KETEP)

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