A study on Flotation of Crystalline Graphite by Microbubble Column

Microbubble Column에 의한 인상흑연(鱗狀黑鉛)의 부선(浮選)에 관한 연구(硏究)

  • Han, Oh-Hyung (Department of Resource Engineering, Chosun University) ;
  • Kang, Hyun-Ho (Department of Resource Engineering, Chosun University)
  • Published : 2006.04.01

Abstract

The total amount of graphite reserves in Korea is about 260 thousand tons. Graphite larks international competitiveness it is mined in only few mines, but recently the demand of portable electronic has increased. Therefore a research for manufacturing domestic high purity graphite is necessary because all of high purity graphite used electrode of 2nd batter depends on expensive importation. A preprocessing level for producing high purity graphite, flotation was conducted using microbubble column machine. In this research $D_{50}=10.314{\mu}m$ sample was used which was produced after grinding 29.50% F.C. primary crushing sample($D_{50}=69.393{\mu}m$) for 20 minutes through attrition mill. As a result using this sample, product above 95% F.C. with recovery over 90% was obtained with only after first stage process through the microbubble column.

국내 흑연광의 총 매장량은 약 260만 톤 정도이지만, 국제경쟁력을 가지지 못해 현재는 일부 광산에서만 채광하고 있다. 그러나 최근 휴대용 전자제품의 수요가 증가함에 따라 2차 전지의 전극에 사용되는 고순도의 흑연을 전량 고가로 수입에 의존하고 있어, 고순도 흑연의 국산화를 위한 연구가 필요한 실정이다. 그러므로 본 연구에서는 고순도 흑연을 생산하기 위한 전처리 단계로서 29.50% F.C.의 원광($D_{50}=69.393{\mu}m$)시료를 attrition mill에서 20분 마광($D_{50}=10.314{\mu}m$)하여 microbubble column을 이용하여 실험한 결과 정선과정 없이도 95% F.C. 이상의 산물을 90%이상의 회수율로 얻을 수 있었다.

Keywords

References

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