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Recovery of valuable metal concentrate from waste printed circuit boards by a physical beneficiation technology

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Abstract

It is greatly significant to separate precious metals from the waste printed circuit boards (PCBs) with appropriate methods for the resource recycling and environment protection. A combined physical beneficiation technology for the recovery of waste PCBs was investigated. Waste PCBs were disassembled into substrates and slots firstly. Waste PCB substrates were crushed to the size below 1 mm by a wet impact crushing approach. The double Rosin–Rammler functions were proposed to describe the particle size distribution characteristic of the substrates. The crushing products of the substrates were separated by a self-designed water-medium tapered column separation bed. The results indicate that the separation efficiency of 93.9 % and metal recovery rate of 93.7 % are obtained with a water discharge of 5.5 m3/h, feeding capacity of 250 g/min and inclination angle of 35°. Waste PCB slots were crushed to the size range of 0.5–5 mm by a dry impact crushing approach and separated by an active pulsing air classifier. The separation results show that a separation efficiency of 92.4 % and metal recovery rate of 96.2 % are obtained with the airflow velocity of 2.90 m/s and pulsing frequency of 2.33 Hz. The mismatching components in the metal concentrate are relatively less with suitable operating conditions. Precious metals could be obtained by the further separation and purification of metal concentrates. The technology has great potential to be applied in the field of waste PCB recycling.

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References

  • Birloaga I, De Michelis I, Ferella F, Buzatu M, Vegliò F (2013) Study on the influence of various factors in the hydrometallurgical processing of waste printed circuit boards for copper and gold recovery. Waste Manag 33(4):935–941

    Article  CAS  Google Scholar 

  • Canal Marques A, Cabrera J-M, de Fraga Malfatti C (2013) Printed circuit boards: a review on the perspective of sustainability. J Environ Manag 131:298–306

    Article  CAS  Google Scholar 

  • Das A, Vidyadhar A, Mehrotra SP (2009) A novel flowsheet for the recovery of metal values from waste printed circuit boards. Resour Conserv Recycl 53(8):464–469

    Article  Google Scholar 

  • Duan C, Wen X, Shi C, Zhao Y, Wen B, He Y (2009) Recovery of metals from waste printed circuit boards by a mechanical method using a water medium. J Hazard Mater 166(1):478–482

    Article  CAS  Google Scholar 

  • Eswaraiah C, Kavitha T, Vidyasagar S, Narayanan SS (2008) Classification of metals and plastics from printed circuit boards (PCB) using air classifier. Chem Eng Process 47(4):565–576

    Article  CAS  Google Scholar 

  • Guo C, Wang H, Liang W, Fu J, Yi X (2011) Liberation characteristic and physical separation of printed circuit board (PCB). Waste Manag 31(9–10):2161–2166

    Article  CAS  Google Scholar 

  • Hall WJ, Williams PT (2007) Separation and recovery of materials from scrap printed circuit boards. Resour Conserv Recycl 51(3):691–709

    Article  Google Scholar 

  • He J, He Y, Zhao Y, Duan C, Ye C (2012a) Numerical simulation of the pulsing air separation field based on CFD. Int J Min Technol 22(2):201–207

    Article  Google Scholar 

  • He Y, Duan C, Wang H, Zhao Y, Tao D (2012b) Separation of metal laden waste using pulsating air dry material separator. Int J Environ Sci Technol 8(1):73–82

    Article  Google Scholar 

  • Huang K, Guo J, Xu Z (2009) Recycling of waste printed circuit boards: a review of current technologies and treatment status in China. J Hazard Mater 164(2–3):399–408

    Article  CAS  Google Scholar 

  • Kara SS (2011) Evaluation of outsourcing companies of waste electrical and electronic equipment recycling. Int J Environ Sci Technol 8(2):291–304

    Article  Google Scholar 

  • Kavitha S, Adish Kumar S, Yogalakshmi KN, Kaliappan S, Banu JR (2013) Effect of enzyme secreting bacterial pretreatment on enhancement of aerobic digestion potential of waste activated sludge interceded through EDTA. Bioresour Technol 150:210–219

    Article  CAS  Google Scholar 

  • Kumar SG, Merrylin J, Kaliappan S, Kumar SA, Yeom IT, Banu JR (2012) Effect of cation binding agents on sludge solubilization potential of bacteria. Biotechnol Bioprocess Eng 17:346–352

    Article  Google Scholar 

  • Merrylin J, Kaliappan S, Kumar SA, Yeom I-T, Banu JR (2014) Enhancing aerobic digestion potential of municipal waste-activated sludge through removal of extracellular polymeric substance. Environ Sci Pollut Res 21(2):1112–1123

    Article  CAS  Google Scholar 

  • Murugan RV, Bharat S, Deshpande AP, Varughese S, Haridoss P (2008) Milling and separation of the multi-component printed circuit board materials and analysis of elutriation based on a single particle model. Powder Technol 183(2):169–176

    Article  CAS  Google Scholar 

  • Ogunniyi IO, Vermaak MKG (2009) Investigation of froth flotation for beneficiation of printed circuit board comminution fines. Miner Eng 22:378–385

    Article  CAS  Google Scholar 

  • Park YJ, Fray DJ (2009) Recovery of high purity precious metals from printed circuit boards. J Hazard Mater 164(2–3):1152–1158

    Article  CAS  Google Scholar 

  • Raj SE, Banu JR, Kaliappan S, Yeom I-T, Adish Kumar S (2013) Effects of side-stream, low temperature phosphorus recovery on the performance of anaerobic/anoxic/oxic systems integrated with sludge pretreatment. Bioresour Technol 140:376–384

    Article  CAS  Google Scholar 

  • Uan DK, Yeom IT, Arulazhagan P, Banu JR (2013) Effects of sludge pretreatment on sludge reduction in a lab-scale anaerobic/anoxic/oxic system treating domestic wastewater. Int J Environ Sci Technol 10(3):495–502

    Article  CAS  Google Scholar 

  • Uma Rani R, Adish Kumar S, Kaliappan S, Yeom IT, Banu JR (2013) Impacts of microwave pretreatments on the semi-continuous anaerobic digestion of dairy waste activated sludge. Waste Manag 33:1119–1127

    Article  CAS  Google Scholar 

  • Veit HM, Diehl TR, Salami AP, Rodrigues JS, Bernardes AM, Tenório JAS (2005) Utilization of magnetic and electrostatic separation in the recycling of printed circuit boards scrap. Waste Manag 25(1):67–74

    Article  CAS  Google Scholar 

  • Wu J, Li J, Xu Z (2008) Electrostatic separation for recovering metals and nonmetals from waste printed circuit board: problems and improvements. Environ Sci Technol 42:5272–5276

    Article  CAS  Google Scholar 

  • Xiu F-R, Zhang F-S (2010) Materials recovery from waste printed circuit boards by supercritical methanol. J Hazard Mater 178(1–3):628–634

    Article  CAS  Google Scholar 

  • Yang J-G, Wu Y-T, Li J (2012) Recovery of ultrafine copper particles from metal components of waste printed circuit boards. Hydrometallurgy 121–124:1–6

    Article  Google Scholar 

  • Zhan L, Xu Z (2009) Separating and recycling metals from mixed metallic particles of crushed electronic waste by vacuum metallurgy. Environ Sci Technol 43:7074–7078

    Article  CAS  Google Scholar 

  • Zhan L, Xu Z (2011) Separating and recovering Pb from copper-rich particles of crushed waste printed circuit boards by evaporation and condensation. Environ Sci Technol 45:5359–5365

    Article  CAS  Google Scholar 

  • Zhao YM, Duan CL, Wu LL, Zhang HJ, He JF, He YQ (2012) The separation mechanism and application of a tapered diameter separation bed. Int J Environ Sci Technol 8(3):719–728

    Article  Google Scholar 

  • Zhou Y, Qiu K (2010) A new technology for recycling materials from waste printed circuit boards. J Hazard Mater 175(1–3):823–828

    Article  CAS  Google Scholar 

Download references

Acknowledgments

We gratefully acknowledge the financial supported by the Fundamental Research Funds for the Central Universities (2014QNA28).

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Authors and Affiliations

  1. School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou, 221116, China

    J. F. He, C. L. Duan, Y. Q. He & H. J. Zhang

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  1. J. F. He
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  2. C. L. Duan
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  3. Y. Q. He
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  4. H. J. Zhang
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Correspondence to J. F. He.

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He, J.F., Duan, C.L., He, Y.Q. et al. Recovery of valuable metal concentrate from waste printed circuit boards by a physical beneficiation technology. Int. J. Environ. Sci. Technol. 12, 2603–2612 (2015). https://doi.org/10.1007/s13762-014-0664-2

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  • DOI: https://doi.org/10.1007/s13762-014-0664-2

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