Applied Chemistry for Engineering (공업화학)

The Korean Society of Industrial and Engineering Chemistry (한국공업화학회)
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A Study on Molten Salt Electrorefining of Uranium Metal Using Low Carbon Steel Cathode

저 탄소강 음극을 사용한 금속우라늄의 용융염 전해정련에 관한 연구

  • Yang, Y.S. (Department of Chemical Engineering, Woosuk University) ;
  • Kang, Y.H. (Korea Atomic Energy Research Institute) ;
  • Hwang, S.C. (Korea Atomic Energy Research Institute)
  • Received : 1999.06.09
  • Accepted : 1999.11.30
  • Published : 1999.12.10
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Abstract

In this paper, electrorefining of uranium metal was studied to develop pyrometallurgical processing technology in molten salt system. The reaction between uranium metal and $CdCl_2$ was taken about 3 hours and the uranium metal deposits were obtained in the form of dendrite grown on the cathode surface in every electrotransport experiment. The shapes of dendrite were changed according to the applied voltages. Current efficiency was decreased with the increase of current density. Deposition rate was not changed after 6 hours and its maxium was obtained at $100{\sim}150mA/cm^2$ of current density and about 75 rpm of stirring speed, respectively. Also, the current efficiency was increased with decrease of the pitch of spiral groove curved on cathode.

본 연구는 용융염계에서 우라늄금속의 건식전해정련공정을 개발하기 위해서 수행되었다. 금속우라늄과 $CdCl_2$와의 반응은 약 3시간이 소요되었으며, 모든 전해전달실험에서 우라늄금속 석출물들은 음극표면에서 성장한 수지상으로 얻어졌다. 수지상의 형태는 부가전압에 따라 변화되었으며, 전류효율은 전류밀도가 증가함에 따라 감소하였다. 반응시간이 6시간 경과된 후에 석출속도는 변화하지 않았으며, 전류밀도가 $100{\sim}150mA/cm^2$이고 교반속도가 약 75 rpm일 때 최대석출속도를 얻었다. 또한, 전류효율은 음극에 있는 나선형 홈의 피치가 작을수록 증가되었다.

Keywords

Acknowledgement

Supported by : 과학기술부

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