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Pyrometallurgical Treatment of Apatite Concentrate with the Objective of Rare Earth Element Recovery: Part II
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering.
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2017 (English)In: Journal of Sustainable Metallurgy, ISSN 2199-3823, Vol. 3, no 4, p. 846-857Article in journal (Refereed) Published
Abstract [en]

Apatite, Ca 5 (PO 4 ) 3 F, is a useful raw material for the production of both elemental phosphorus and phosphoric acid, and the mine tailings present at Luossavaara-Kiirunavaara AB (LKAB) in Kiruna, Sweden, represent a significant potential European source of apatite if upgraded to a concentrate. In the present study, pilot apatite concentrate made from the LKAB tailings has been pyrometallurgically treated using carbon to extract phosphorus without fluxing at temperatures exceeding 1800 °C, with the ultimate objective of recovery of rare earth elements (REEs) from the resulting slag/residue phases. Experimental behavior has been modeled using equilibrium thermodynamic predictions performed using HSC ® . A process is proposed, and mass–energy balance presented, for the simultaneous production of P 4 and CaC 2 (ultimately for acetylene, C 2 H 2 , and PVC production) from apatite, producing a lime residue significantly enriched in REEs. Possible implications to kiln-based processing of apatite are also discussed. 

Place, publisher, year, edition, pages
Springer , 2017. Vol. 3, no 4, p. 846-857
Keywords [en]
Apatite, IHP, Improved hard process, Phosphorus, Rare earth, REE, Smelting
National Category
Materials Engineering
Identifiers
URN: urn:nbn:se:kth:diva-251789DOI: 10.1007/s40831-017-0148-yISI: 000417302400019Scopus ID: 2-s2.0-85064177412OAI: oai:DiVA.org:kth-251789DiVA, id: diva2:1318157
Note

QC 20190527

Available from: 2019-05-27 Created: 2019-05-27 Last updated: 2019-05-27Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
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  • Other locale
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Output format
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