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NiobiumNiobium and tantalumTantalum areColumbite referredNiobium toTantalum as critical metals as a result of their minerals'Mineral low crustal abundance along with the rapidly growing demand for the metals, especially their applications in aerospace and energy sectors. Conventionally, these metals are decomposed with HF acid at moderately high temperaturesHigh temperature, forming fluoride complexes that are separated by solvent extraction. This conventional separationSeparation and extraction of Nb/Ta involve certain environmental and health challenges with the use of hazardous and toxic chemical reagents. This study investigates the dissolutionDissolution mechanism of Nb/Ta mineralMineral complexes using an alkaliAlkali medium for efficient beneficiationBeneficiation/separationSeparation measures. More so, physicochemicalPhysicochemical characterizationsCharacterization of the reaction mechanism of resulting products were conducted. In addition, the thermal analysis and thermodynamicThermodynamics/chemical reactions were investigated for the formation of sodium and/or potassium niobates/tantalates. This paper therefore provides physicochemicalPhysicochemical data for the dissolutionDissolution and extraction of Nb/Ta, as well as the formation of soluble complexes using alkaliAlkali medium.

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Physicochemical Characterization and Alkali Dissolution of Alluvial Fe-Columbite Deposit for Feasible Formation of Soluble Niobium and Tantalum Complexes

  • 会议论文

  • 发表日期：

    2025年

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  • Nnaemeka Stanislaus Nzeh,
  • Patricia Abimbola Popoola,
  • Victor Ekene Ogbonna,
  • Samson O. Adeosun,
  • Abraham A. Adeleke

摘要

NiobiumNiobium and tantalumTantalum areColumbite referredNiobium toTantalum as critical metals as a result of their minerals'Mineral low crustal abundance along with the rapidly growing demand for the metals, especially their applications in aerospace and energy sectors. Conventionally, these metals are decomposed with HF acid at moderately high temperaturesHigh temperature, forming fluoride complexes that are separated by solvent extraction. This conventional separationSeparation and extraction of Nb/Ta involve certain environmental and health challenges with the use of hazardous and toxic chemical reagents. This study investigates the dissolutionDissolution mechanism of Nb/Ta mineralMineral complexes using an alkaliAlkali medium for efficient beneficiationBeneficiation/separationSeparation measures. More so, physicochemicalPhysicochemical characterizationsCharacterization of the reaction mechanism of resulting products were conducted. In addition, the thermal analysis and thermodynamicThermodynamics/chemical reactions were investigated for the formation of sodium and/or potassium niobates/tantalates. This paper therefore provides physicochemicalPhysicochemical data for the dissolutionDissolution and extraction of Nb/Ta, as well as the formation of soluble complexes using alkaliAlkali medium.