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국내산 흑연의 구형화에 미치는 로터 속도의 영향

The Effect of Rotor Speed on the Circiuarity of Domestic Graphite

  • 이준섭 (한국해양대학교 에너지자원공학과) ;
  • 임유진 (한국해양대학교 에너지자원공학과) ;
  • 유경근 (한국해양대학교 에너지자원공학과) ;
  • 박현규 (한국광해광업공단 비축사업처)
  • Junseop, Lee (Department of Energy and Resources Engineering, Korea Maritime and Ocean University) ;
  • Yoojin, Lim (Department of Energy and Resources Engineering, Korea Maritime and Ocean University) ;
  • Kyoungkeun, Yoo (Department of Energy and Resources Engineering, Korea Maritime and Ocean University) ;
  • Hyunkyoo, Park (Stockpile Management Department, Korea Mine Rehabilitation and Mineral Resources Corporation (KOMIR))
  • 투고 : 2022.11.25
  • 심사 : 2022.12.12
  • 발행 : 2022.12.31

초록

국내산 인상흑연정광의 리튬이온전지 소재로서 활용을 위해 고강도 혼합기를 이용하여 구형화 실험 후 건식분급을 진행하여 각 산물에 대한 구형화도와 입도를 분석하였다. 3,000 rpm의 로터속도에서는 정광시료와 산물의 입도와 구형화도의 차이가 관찰되지 않았으나, 로터속도를 6,000 rpm, 10,000 rpm 12,000 rpm으로 조절하여 구형화도 실험을 진행한 결과, 로터속도와 구동시간의 증가에 따라 구형화도는 증가하고 입도는 감소하였다. 로터속도 12,000 rpm에서 10분간 구동한 결과, 구형화도는 0.870으로부터 0.936까지 증가하였다. 구형화실험 후 건식분급을 진행하였을 때 조립자의 구형화도는 0.947까지 증가하였고 SEM 결과에서 구형입자가 확인되어 구형화가 성공적으로 이루어졌다고 판단되었다.

The circularity and particle size distribution of products obtained from dry classification after circularity tests using a high-intensity mixer were investigated to evaluate the use of domestic graphite concentrate as a lithium-ion battery material. At a rotor speed of 3,000 rpm, the particle size and circularity of the concentrated sample and product were unchanged. The circularity increased and particle size decreased when the rotor speeds were increased to 6,000 rpm, 10,000 rpm, and 12,000 rpm and the operating time was increased. For instance, the circularity increased from 0.870 to 0.936 when the rotor speed was increased from 3,000 rpm to 12,000 rpm for an operating time of 10 min. After the circularity test, dry classification was performed, wherein the circularity of the coarse particles was found to have increased to 0.947. Round particles were observed in the SEM images, indicating that high circularity was successfully achieved.

키워드

과제정보

이 논문은 2020~2021년 한국광해광업공단의 기술연구사업비와 2022년도 산업통상자원부의 재원으로 해외자원개발협회의 지원을 받아 수행되었습니다(과제명: 자원개발 산합협력 컨소시엄-스마트마이닝 전문인력 양성, 과제번호:2021060003).

참고문헌

  1. Korea Mineral Resource Information Service (KOMIS), Mineral Information, https://www.komis.or.kr, November, 25, 2022.
  2. Kim, R., Lee, J., Park, J., et al., 2022 : Current Status in the Mining Industry of Critical Minerals for Battery (Li, Ni, Co, and C) in the Energy Transition Era, Journal of Mineral and Energy Resources, 59(2), pp.218-232.
  3. Park, C. and Oh, S., 1999 : Anodic Properties of Needle Cokes-dreived Graphitic Materials in Lithium SEcondary Batteries, Journal of the Korean Electrochemical Society, 2(4), pp.221-226. https://doi.org/10.5229/JKES.1999.2.4.221
  4. Kim, G.J., Yoon, J.J., and Lee, J.D., 2019 : Electrochemical properties of natural graphite coated with PFO-based pitch for lithium-ion battery anode, Korean Chemical Engineering Research, 57(5), pp.672-678.
  5. Lee, S. and Lee, J., 2019 : Electrochemical Performance of Graphite/Silicon/Pitch Anode Composites Bonded with Graphite Surface PVP and Silica Amine Function Group, Korean Chemical Engineering Research, 57(1), pp.118-123. https://doi.org/10.9713/KCER.2019.57.1.118