A review on extractive metallurgy of tantalum and niobium
| Autor: | Mac C. Mugumaoderha, Stoyan Gaydardzhiev, Alidor Shikika, Fabrice A. Muvundja, Manivannan Sethurajan |
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| Rok vydání: | 2020 |
| Předmět: |
Chemistry
business.industry Pure metals Metallurgy 0211 other engineering and technologies Metals and Alloys Tantalum Niobium chemistry.chemical_element 02 engineering and technology Extractive metallurgy Raw material Industrial and Manufacturing Engineering 020401 chemical engineering Materials Chemistry Microelectronics Leaching (metallurgy) 0204 chemical engineering Solvent extraction business 021102 mining & metallurgy |
| Zdroj: | Hydrometallurgy. 198:105496 |
| ISSN: | 0304-386X |
| DOI: | 10.1016/j.hydromet.2020.105496 |
| Popis: | On-going technological developments, especially in the field of microelectronics and communication have reflected in concomitant increase in the demand for strategic metals such as tantalum (Ta) and niobium (Nb). The extraction of these two metals from ore deposits and secondary resources is based on the generic extractive metallurgical techniques known from the non-ferrous metals value chains. However, their operational particularities and especially the downstream refining remain a particular challenge. To this end, the existing and emerging processes for preparation of raw materials of Ta and Nb, leaching and recovery of pure metals are reviewed. The upstream operations and the downstream extractive metallurgical processes are discussed. The different sub-processes making part of the hydrometallurgical processing of the two metals, including leaching and solvent extraction are described, with their advantages and limitations highlighted. The selective recovery of Ta and Nb from the leachates is most commonly realized by solvent extraction and stripping which are therefore extensively covered. In the same context, the most widely used and promising extractants are compared in the light of their separation efficiency and level of handling hazard. |
| Databáze: | OpenAIRE |
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