Migration Behavior of Fluorides in Spent Potlining During Vacuum Distillation Method

  • Nan Li
  • Lei Gao
  • Kinnor ChattopadhyayEmail author
Conference paper
Part of the The Minerals, Metals & Materials Series book series (MMMS)


Recently, the application of SPL in metallurgical industry has gained significant attention since SPL was proved to have an indelible potential to be applied in pyrometallurgy as a low-cost fuel. However, the volatile fluorides in SPL, especially, NaF and Na3AlF6, limit this application due to environmental concerns, and practical/engineering issues. In this manuscript, the new vacuum distillation method (VDM) was recommended to pretreat SPL first cut below 1000 °C to separate volatile fluorides and graphite. The products, leachable fluorides and carbon enriched residue, are expected to be reused in metallurgical industries for cost-saving. To confirm the feasibility of this idea, pure fluorides, artificial fluorides-graphite mixtures (NaF, Na3AlF6, CaF2, C) as well as SPL were submitted to the VDM process. The migration behavior of the components during VDM treatment has been studied, and soluble fluoride content in the VDM treated residues was examined to draw a VDM map for fluorides treatment. The overall goal is to develop an environmentally friendly technique to extract the economic value of SPL in an efficient manner.


Spent potlining Vacuum distillation method Fluorides emission Migration behavior Recycling Hazardous waste 


  1. 1.
    Pong TK, Adrien RJ, Besida J, O’Donnell TA, Wood DG (2000) Spent Potlining – A Hazardous Waste Made Safe. Process Safety and Environmental Protection 78(3): 204–208.Google Scholar
  2. 2.
    Turner BD, Binning PJ, Sloan SW (2008) A calcite permeable reactive barrier for the remediation of Fluoride from spent potliner (SPL) contaminated groundwater. J. Contam. Hydrol. 95(3–4): 110–120.Google Scholar
  3. 3.
    Banker DB, Brooks DG, Cutshall, Macauley DD, Strahan DF (1992) Detoxification of aluminum spent potlinner by thermal treatment lime slurry quench and post-kiln treatment. US. Patent, 11–17.1992.Google Scholar
  4. 4.
    Indurkar PD (2014) Optimization in the treatment of Spent pot Lining—A Hazardous Waste Made Safe. Master thesis, National Institute of Technology, Rourkela, Odisha, India.Google Scholar
  5. 5.
    Yu D, Mambakkam V, Rivera AH, Li D, Chattopadhyay K (2015) Spent potlining: A myriad of opportunities. Aluminium International Today the Journal of Aluminium Production & Processing. 27: 17–20.Google Scholar
  6. 6.
    Pawlek RP (2012) Spent Potlining: an Update. TMS Light Metals. 1313–1317.Google Scholar
  7. 7.
    Yu D, Chattopadhyay K (2016) Numerical simulation of copper recovery from converter slags by the utilisation of spent potlining (SPL) from aluminium electrolytic cells. Canadian Metallurgical Quarterly. 55(2): 251–260.Google Scholar
  8. 8.
    Gao L, Mostaghel S, Ray S, Chattopadyay K (2016) Using SPL (Spent Pot-Lining) as an Alternative Fuel in Metallurgical Furnaces. Metallurgical & Materials Transactions E 3(3): 1–10.Google Scholar
  9. 9.
    Yu D, Mambakkam V, Li D, Chattopadhyay K, Gao L (2017) Alternative Applications of SPL: Testing Ideas Through Experiments and Mathematical Modeling. TMS Light Metals. 579–586.Google Scholar
  10. 10.
    Lisbona DF, Somerfield C, Steel KM (2013) Leaching of spent pot-lining with aluminium nitrate and nitric acid: Effect of reaction conditions and thermodynamic modelling of solution speciation. Hydrometallurgy 134–135(3): 132–143.Google Scholar
  11. 11.
    Hamel G, Breault R, Charest G, Poirier S, Boutin B (2009) From the “Low caustic leaching and liming” process development to the Jonquière spent potlining treatment pilot plant start-up, 5 years of process up-scaling, engineering and commissioning. TMS Light Metals. 921–925.Google Scholar
  12. 12.
    Li N, Xie G, Wang ZX, Hou YQ, Li RX (2014) Recycle of Spent Potlining with Low Carbon Grade by Floatation. Advanced Materials Research 881–883: 1660–1664.Google Scholar
  13. 13.
    Øye HA (2017) Discussion of Industrial Spent Potlining Treatment. Proceedings of 35th International ICSOBA Conference, Hamburg, Germany, 1081–1088 2–5 Oct 2017.Google Scholar

Copyright information

© The Minerals, Metals & Materials Society 2019

Authors and Affiliations

  1. 1.College of ScienceHong He UniversityMengziChina
  2. 2.Faculty of Materials Science and EngineeringKunming University of Science and TechnologyKunmingChina
  3. 3.Cross Appointed to Mechanical and Industrial Engineering, Process Metallurgy Research Labs, Department of Materials Science and Engineering, Faculty of Applied Science and EngineeringUniversity of TorontoTorontoCanada

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