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Migration Behavior of Fluorides in Spent Potlining During Vacuum Distillation Method

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Light Metals 2019

Part of the book series: The Minerals, Metals & Materials Series ((MMMS))

Abstract

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.

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Author information

Authors and Affiliations

  1. College of Science, Hong He University, Mengzi, 661199, China

    Nan Li

  2. Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, 650093, China

    Lei Gao

  3. Cross Appointed to Mechanical and Industrial Engineering, Process Metallurgy Research Labs, Department of Materials Science and Engineering, Faculty of Applied Science and Engineering, University of Toronto, Toronto, M5S 3E4, ON, Canada

    Kinnor Chattopadhyay

Authors
  1. Nan Li
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  2. Lei Gao
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  3. Kinnor Chattopadhyay
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Corresponding author

Correspondence to Kinnor Chattopadhyay .

Editor information

Editors and Affiliations

  1. Metal Quality Solutions, LLC, Avonmore, PA, USA

    Corleen Chesonis

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© 2019 The Minerals, Metals & Materials Society

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Li, N., Gao, L., Chattopadhyay, K. (2019). Migration Behavior of Fluorides in Spent Potlining During Vacuum Distillation Method. In: Chesonis, C. (eds) Light Metals 2019. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-030-05864-7_105

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