Resources Recycling (자원리싸이클링)

The Korean Institute of Resources Recycling (한국자원리싸이클링학회)
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Recycling of Copper Scrap

동스크랩의 리사이클링

  • Sohn, Ho-Sang (School of Materials Science and Engineering, Kyungpook National University)
  • Received : 2019.03.12
  • Accepted : 2019.04.17
  • Published : 2019.06.30
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Abstract

Copper is one of the first metals utilized by humankind about 11,500 years ago. But copper is not plentiful metallic element in the earth's crust. Copper has a high thermal and electric conductivity and is relatively corrosion resistant. In principle copper is virtually 100 % recyclable as an element without loss of quality. The recycling of copper scrap reduces the energy consumption and environmental burden, comparing to the primary metal production. Currently, approximately 30% of the global copper supply provides by recycling. Copper scrap is smelted in primary and secondary smelter. Type of furnace and process steps depend on the quality and grade of scrap. Depending on copper content of the secondary raw material, refining is required, which is usually done through electrorefining. This work provides an overview of the primary copper production and recycling process.

동은 약 11,500년 전에 인류가 최초로 사용한 금속이다. 그러나 동은 지각 중에 그다지 풍부하지 않은 금속이다. 동은 높은 열전도도와 전기전도도 그리고 어느 정도의 내식성을 가지고 있다. 특히 동은 품질의 저하 없이 100 % 리사이클링할 수 있는 금속이다. 또 동스크랩을 리사이클링하면 1차 지금 생산과 비교하여 에너지 및 환경부하를 저감할 수 있다. 따라서 최근에는 동사용량의 약 30 %는 리사이클링에 의해 공급되고 있다. 동스크랩은 1차 제련소나 2차제련소에서 정련하고 있으며, 리사이클링에 사용하는 노나 공정은 스크랩의 품질이나 등급에 따라 차이가 있다. 동함유 2차 자원은 동함유량에 따라 정련이 필요하며, 최종적으로 전해정련에 의해 전기동을 생산하고 있다. 본 연구에서는 동의 1차지금 생산 및 리사이클링 공정에 대해 고찰하였다.

Keywords

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Fig. 1. Main processes for extracting copper from sulfide ores.

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Fig. 2. Principal of electrorefining and electrorefining circuitry of electrolytic cells.

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Fig. 3. Flowsheet of Cu leach, solvent extraction and electrowinning (N-Chlo process).

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Fig. 4. Copper pendant from Shanidar Cave, Northeast Iraq (a), and the metal awl from Tel Tsaf (b).

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Fig. 5. World refined copper production, 1900 ~ 2017.

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Fig. 6. Flowsheet of recycling system of copper resources in LS-Nikko Copper Smelter.

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Fig. 7. Recycle cable chopping flowsheet for separating copper from insulation and ferrous material.

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Fig. 8. Schematic illustration of Kayser Recycling System.

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Fig. 9. Flowsheet of recycling process of copper resources in GRM. Schematic illustration of GRM.

Table 1. Physico-chemical properties of copper2)

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Table 2. End use markets for copper products types (2017)11)

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Table 4. Overview of copper secondary starting materials, input materials for the production of secondary copper12)

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Table 3. Typical lifetimes of copper products12)

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References

  1. Sohn, Hosang, 2019 : Engineering of Resources Recycling, p.14, KNU Press, Daegu, Korea.
  2. Lenka Muchova, Peter Eder, and Alejandro Villanueva, 2011 : End-of-waste Criteria for Copper and Copper Alloy Scrap: Technical Proposals, p.7, European Commission JRC, Luxembourg.
  3. Toshiharu Fujisawa, 1996 : Recycle Processes of Copper, Materia Japan 35(12), pp.1294-1297. https://doi.org/10.2320/materia.35.1294
  4. Oishi, Toshio and Ono, Katsutoshi, 1986 : Activity Coefficients and Interaction Parameters of Dilute Solutes in Liquid Copper, Bulletin of the Japan Institute of Metals 25(4), pp.291-299. https://doi.org/10.2320/materia1962.25.291
  5. W. G. Davenport, M. King, M. Schlesinger, and A. K. Biswas, 2002 : Chapter 17 Hydrometallurgical Copper Extraction: Introduction and Leaching, Extractive Metallurgy of Copper 5th Ed., pp.300-302, ELSEVIER SCIENCE Ltd, Oxford, UK.
  6. https://www.nmm.jx-group.co.jp/english/news/2008/20080624e.html
  7. Cyril Stanley Smith, 1975 : Metallurgy as a Human Experience, Metall. Trans. A 6A(4), pp.603-623. https://doi.org/10.1007/BF02672281
  8. Yosef Garfinkel, Florian Klimscha, Sariel Shalev, and Danny Rosenberg, 2014 : The Beginning of Metallurgy in the Southern Levant: A Late 6th Millennium CalBC Copper Awl from Tel Tsaf, Israel, PLoS ONE 9(3), e92591, pp.1-2.
  9. Kelly, T. D. and Matos, G. R., 2017 : U.S. Geological Survey, 2017: Copper statistics, Historical statistics for mineral and material commodities in the United States.
  10. International Copper Study Group, 2018 : The World Copper Factbook 2018, p.40, ICSG, Lisbon, Portugal.
  11. International Copper Association Ltd, 2018 : Global 2018 Semis End Use Data Set, https://copperalliance.org
  12. Terry Norgate, 2013 : Metal recycling: The need for a life cycle approach, EP135565, CSIRO, Australia.
  13. Lenka Muchova, Peter Eder, and Alejandro Villanueva, 2011 : End-of-waste Criteria for Copper and Copper Alloy Scrap: Technical Proposals, p.16, European Commission JRC, Luxembourg.
  14. Kim, Byung-Su, Lee, Jae-chun, and Jeong, Jin-ki, 2009 : Current Status on the Pyrometallurgical Process for Recovering Precious and Valuable Metals from Waste Electric and Electronic Equipment (WEEE) Scrap, J. of Korean Inst. of Resource Recycling 18(4), pp.14-23.
  15. Heo, Su-Bin and Sohn, Ho-Sang, 2017 : Melting and Refining of Cu Powder Scraped from Waste PCB with $Fe_2O_3$, J. of Korean Inst. of Resources Recycling 26(4), pp.95-100. https://doi.org/10.7844/KIRR.2017.26.4.95
  16. Gerardo, R. F. Alvear Flores, Stanko Nikolic, and Phillip J. Mackey, 2014 : $ISASMELT^{TM}$ for the Recycling of EScrap and Copper in the U.S. Case Study Example of a New Compact Recycling Plant, JOM 66(5), pp.823-832. https://doi.org/10.1007/s11837-014-0905-3
  17. Mark E. Schlesinger, Matthew J. King, Kathryn C. Sole, and William G. Davenport, 2011 : Ch. 19 Chemical Metallurgy of Copper Recycling, Extractive Metallurgy of Copper 5th Ed., p.392, ELSEVIER SCIENCE Ltd, Oxford, UK.
  18. Masao Shima, Shizuo Kawakita, and Seiji Mori, 1991 : Recycling of Copper, Lead and Zinc, Sigen-to-Sozai 107(2), pp.85-94. https://doi.org/10.2473/shigentosozai.107.85
  19. Hiroshi Majima et al., 1993 : Dissolution of Copper with Aqueous Cupric Ammine Solution- Studies on the selective recovery of copper and iron from motor scrap (1st Report), Shigen-to-Sozai 109(3), pp.191-194. https://doi.org/10.2473/shigentosozai.109.191

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