A Preliminary Study on Tantalum Recycling from Obsolete Condenser by Multidisciplinary Process

융복합기술(融複合技術)에 의한 폐(廢)콘덴서로부터 탄탈륨 재활용(再活用) 기초연구(基礎硏究)

  • Published : 2007.12.27

Abstract

For recycling of tantalum from obsolete condenser, physical separations and chlorination of tantalum scraps with $Cl_2$ and $CCl_4$ were investigated. The recovery ratio of tantalum from obsolete condenser was 98% by using a multidisciplinary process of crushing by stamp mill, wet gravity separation by the shaking table, and air classification. In the chlorination reaction of non-oxidized Ta anode with $Cl_2$, the highest weight loss ratio is at least 60%, while in the chlorination reaction of Ta anode with $CCl_4$, the reaction rate for the oxidized Ta anode is faster than that of the non-oxidized Ta anode.

폐콘덴서로부터 탄탈륨 음극을 회수하기 위하여 물리적 선별과, 염소가스와 사염화탄소를 이용한 기초 염화반응에 관한 연구를 수행하였다. Stamp mill을 이용한 파쇄, 요동테이블에서의 습식 비중선별 그리고 공기 분급을 통하여 탄탈륨 음극을 98% 회수할 수 있었다. 염소가스를 이용한 TGA분석에서 탄탈륨 음극의 최대 무게 감소는 60%였고, 사염화탄소에 의한 탄탈륨 음극의 염화반응은 탄탈륨 음극을 산화탄탈륨으로 변환한 후가 반응율이 높았다.

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References

  1. Nobuaki Sato et al, 1990: Pyrometallurgical Treatment of Tantalum Capacitor Scrap via Chlorides, Bulletin of the Research Institute of Mineral Dressing and Metallurgy Tohoku University, 47(2), pp. 96-104
  2. Kim, S. et al., 2003: Recovery of Tantalum Anode from Waste Tantalum Condenser by Air Classification, J. of Korean Inst. of Resources Recycling., 12(3), pp. 3-12
  3. Zhulanov, O. N. et al.: 1997, New Aspects in Development of the Chloride Process for Tantalum-Niobium Raw Materials, Russian Journal of' Non Ferrous Metals, 38(10), pp. 33-37
  4. Gonjalez, J. et al, 1998: Chlorination of Niobium and Tantalum Ore. Thermochimica Acta. 311, pp. 61-69 https://doi.org/10.1016/S0040-6031(97)00376-6
  5. Jena, P. K. et al., 2001:, Study on the Kinetics of Carbon Tetrachloride Chlorination of Tantalum Pentoxide, Metall. Mater. Trans. B 32B, pp. 801-810
  6. Kim, S. et al., 2005: Study on the Kinetics of the Chlorination Reaction of Tantalum Pentoxide by Carbon Terachlotide, J. of Kor. Inst. Met. & Mater., 43(5), pp. 389-392