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Research Paper

Closed Grinding Circuit Design of Cu-Ni-Co-Fe-S Matte

Cu-Ni-Co-Fe-S 매트의 분쇄/분급 공정 설계

Minuk Jung1
,
Seongsoo Han1
,
Chulwoo Nam2
,
Kyungho Park3
,
Jaikoo Park1*
정 민욱1
,
한 성수1
,
남 철우2
,
박 경호3
,
박 재구1*
1한양대학교 자원환경공학과
2한국지질자원연구원 자원회수연구센터
3한국지질자원연구원 DMR융합연구단
* Corresponding Author
28 February 2017. pp. 57-65
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Abstract

Bond work index of Cu-Ni-Co-Fe-S matte having different sulfur contents was measured, followed by closed grinding circuit design which consisted of ball mill and spiral classifier. At first, the mineralogical and chemical contents of the matte was analyzed using XRF and SEM-EDS method. Afterward, Grinding work index of matte was estimated using the Bond work index test. The work index measured was used to determine grinding circuit specification lastly. It was found that the more the sulfur concentration was in the matte, the less Bond work index value was as sulfur contents increased from S 15.9 wt.% - S 24.9 wt.%. As a result, the grinding energy was reduced up to 45% in the range. For grinding process design, Closed grinding circuit was compared with open grinding circuit, in which hydrocyclone and spiral classifier were also investigated.

Keywords
Manganese nodule
Work index
Grinding process design
Classification process design

Cu-Fe-Ni-Co-S 매트의 분쇄일지수를 측정하였으며, 이어서 볼밀과 스파이럴 분급기로 구성된 매트의 폐회로 분쇄 공정을 설계하였다. 우선 XRF와 SEM-EDS 분석을 이용하여 매트의 광물학적, 화학적 조성 변화를 조사하였다. 이어서 본드 분쇄 일지수 시험 방법을 이용하여 본드 분쇄 일지수를 측정하였으며, 측정된 본드 분쇄 일지수를 바탕으로 분쇄 공정에서 사용되는 기기의 종류와 규격을 결정하였다. 실험 결과, 매트에 황 함량이 많을수록 본드 분쇄 일지수 값이 낮게 나타났으며, 황 함량이 15.9 wt.%에서 24.9 wt.%으로 증가함에 따라 최대 45%의 분쇄일지수가 감소함을 확인할 수 있었다. 분쇄 공정 설계 시, 개회로와 폐회로 공정을 비교하였으며, 폐회로 공정 운용 시 분급 공정으로 습식 싸이클론과 스파이럴 분급기의 사용을 검토하였다.

키워드
망간 단괴
분쇄 일지수
분쇄 공정 설계
분급 공정 설계
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Information
  • Publisher :The Korean Society of Mineral and Energy Resources Engineers
  • Publisher(Ko) :한국자원공학회
  • Journal Title :Journal of the Korean Society of Mineral and Energy Resources Engineers
  • Journal Title(Ko) :한국자원공학회지
  • Volume : 54
  • No :1
  • Pages :57-65
  • Received Date : 2016-12-12
  • Revised Date : 2017-02-27
  • Accepted Date : 2017-02-27
  • DOI :https://doi.org/10.12972/ksmer.2017.54.1.057
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