Selective preparation of lithium carbonate from overhaul slag by high temperature sulfuric acid roasting - Water leaching.

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  • Additional Information
    • Source:
      Publisher: Academic Press Country of Publication: England NLM ID: 0401664 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1095-8630 (Electronic) Linking ISSN: 03014797 NLM ISO Abbreviation: J Environ Manage Subsets: MEDLINE
    • Publication Information:
      Original Publication: London ; New York, Academic Press.
    • Subject Terms:
      Sulfuric Acids*/chemistry ; Recycling*/methods ; Lithium Carbonate*/chemistry; Aluminum/chemistry ; Lithium/chemistry ; Water/chemistry
    • Abstract:
      An efficient recycling process is developed to recover valuable materials from overhaul slag and reduce its harm to the ecological environment. The high temperature sulfuric acid roasting - water leaching technology is innovatively proposed to prepare Li 2 CO 3 from overhaul slag. Under roasting conditions, fluorine volatilizes into the flue gas with HF, lithium is transformed into NaLi(SO 4 ), aluminum is firstly transformed into NaAl(SO 4 ) 2 , and then decomposed into Al 2 O 3 , so as to selective extraction of lithium. Under the optimal roasting - leaching conditions, the leaching rate of lithium and aluminum are 95.6% and 0.9%, respectively. Then the processes of impurity removal, and settling lithium are carried out. The Li 2 CO 3 with recovery rate of 72.6% and purity of 98.6% could be obtained under the best settling lithium conditions. Compared with the traditional process, this work has short flow, high controllability, remarkable technical, economic, and environmental benefits. This comprehensive recycling technology is suitable for overhaul slag, and has great practical application potential for the disposal of other hazardous wastes in electrolytic aluminum industry.
      Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
      (Copyright © 2024 Elsevier Ltd. All rights reserved.)
    • Contributed Indexing:
      Keywords: High temperature roasting; Lithium carbonate; Overhaul slag; Resource recovery; Sulfuric acid additive
    • Accession Number:
      0 (sulfuric acid)
    • Publication Date:
      Date Created: 20240510 Date Completed: 20240521 Latest Revision: 20240521
    • Publication Date:
      20240521
    • Accession Number:
      10.1016/j.jenvman.2024.120963
    • Accession Number:
      38728980