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Effect of the Temperature Conditions of Sulfation Process on Extraction of Rare-Earth Metals from Refractory Ore

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Metallurgist Aims and scope

Physical and chemical testing of sulfate product, obtained as a result of high-temperature treatment of ore from the Kundybai field with sulfuric acid mixture at 500°C revealed the presence of cerium oxide corresponding to natural cerianite (CeO2). A mechanism of its formation is proposed, which includes a stage of cerium sulfate (Ce(SO4)2) formation followed by its dissociation to CeO2. The presence of this compound in the sulfate product allowed establishing the temperature required to further conduct the sulfation process and prevent cerianite formation.

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Authors and Affiliations

  1. JSC “Institute of Metallurgy and Ore Beneficiation”, Almaty, Republic of Kazakhstan

    Ye. G. Bochevskaya

  2. NJSC “Kazakh National Research Technical University named after K.I.Satpaev” (NJSC “KazNRTU”), Almaty, Republic of Kazakhstan

    Z. S. Abisheva

  3. JSC “Institute of Metallurgy and Ore Beneficiation”, Almaty, Republic of Kazakhstan

    Z. B. Karshigina

  4. JSC “Institute of Metallurgy and Ore Beneficiation”, Almaty, Republic of Kazakhstan

    E. A. Sargelova

  5. JSC “Institute of Metallurgy and Ore Beneficiation”, Almaty, Republic of Kazakhstan

    M. N. Kvyatkovskaya

  6. JSC “Institute of Metallurgy and Ore Beneficiation”, Almaty, Republic of Kazakhstan

    S. T. Akchulakova

Authors
  1. Ye. G. Bochevskaya
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  2. Z. S. Abisheva
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  3. Z. B. Karshigina
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  4. E. A. Sargelova
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  5. M. N. Kvyatkovskaya
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  6. S. T. Akchulakova
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Corresponding author

Correspondence to Ye. G. Bochevskaya.

Additional information

Translated from Metallurg, Vol. 62, No. 6, pp. 78–88, May 2018.

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Bochevskaya, Y.G., Abisheva, Z.S., Karshigina, Z.B. et al. Effect of the Temperature Conditions of Sulfation Process on Extraction of Rare-Earth Metals from Refractory Ore. Metallurgist 62, 574–586 (2018). https://doi.org/10.1007/s11015-018-0695-x

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  • DOI: https://doi.org/10.1007/s11015-018-0695-x

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