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THE RECOVERY OF RARE-EARTH ELEMENTS FROM APATITE CONCENTRATE BY ACID AND DIGESTION-WATER LEACHING PROCESSES IN MORVARID IRON MINE, IRAN

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Abstract

In this article, the recovery of the Y, La, Nd, and Ce rare-earth elements (REE) from apatite concentrate by acid leaching and digestion-water leaching processes were studied. The maximum REE recovery of 62% in the acid leaching process with sulfuric acid was obtained for La in the condition of 12 M acid concentration, leaching time of 4 h, process temperature of 25°C , and a liquid to solid ratio (L/S) of 1:5. In the optimal conditions in terms of process (220°C, 3 h and L/S (1:2)), the digesting process in the presence of sulfuric acid led to the recovery of La, Ce, Nd and Y at 93.92, 92.22, 92.04 and 91.00%, respectively. In contrast, the aqueous leaching process in the optimum conditions, including a leaching time of 5 h, at 80°C and L/S of 1:10 ended up recovering the La, Ce, Nd, and Y at 89.50, 88.45, 92.20 and 94.0%, respectively.

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Authors and Affiliations

  1. Islamic Azad University, South Tehran Branch, Technical and Engineering Faculty, Department of Mines and Petroleum, 1584743311, Tehran, Iran

    A. Adib & E. Rahimi

  2. Imam Khomeini International University (IKIU), Technical and Engineering Faculty, Mining Department, 1584743311, Tehran, Iran

    R. Ahmadi

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  1. A. Adib
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Correspondence to A. Adib.

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Translated from Fiziko-Tekhnicheskie Problemy Razrabotki Poleznykh Iskopaemykh, 2021, No. 1, pp. 146–158. https://doi.org/10.15372/FTPRPI20210114.

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Adib, A., Ahmadi, R. & Rahimi, E. THE RECOVERY OF RARE-EARTH ELEMENTS FROM APATITE CONCENTRATE BY ACID AND DIGESTION-WATER LEACHING PROCESSES IN MORVARID IRON MINE, IRAN. J Min Sci 57, 131–143 (2021). https://doi.org/10.1134/S1062739121010142

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  • DOI: https://doi.org/10.1134/S1062739121010142

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