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Niobium–tantalum ore containing euxenite, samarsakite and fergusonite was leached using sulphuric acid. ... Hydrometallurgy, Volume 188, 2019, pp. 123-139. John Demol, …, Gamini Senanayake. Recovery of niobium and titanium from ilmenorutile by NaOH roasting-H 2 SO 4 leaching process.
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Abstract A stable and continuous leaching process for niobium and tantalum extraction from ferrocolumbium tantalum (FT) was developed. The effects of initial concentration of HF and H2SO4, grinding fineness, leaching time, and temperature on the leaching rate of Ta, Nb, Fe, and Si were studied. Experimental results show that the leaching rates of Ta, Nb, Fe, …
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Niobium and tantalum have applications ranging from nuclear, steel, aerospace and manufacturing industries (Agulyansky, 2004; Mackay and Simandl, 2014).These metals occur in the Columbite-Tantalite ore which are dissolved in hydrofluoric acid solution and then extracted using solvent extraction (Mirji et al., 2016; Zhu and Cheng, 2011).The conventional processes …
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Oxalate-based aqueous media represent one of the rare options for solubilizing weighable amounts of niobium (Nb) and tantalum (Ta) without using toxic fluoride-based mixtures. Recent progress in the hydrometallurgy of Nb and Ta also highlighted the potential of oxalate-nitrate media for the separation of Nb and Ta.
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This review paper discusses the extraction processes of niobium and tantalum, encompassing hydrometallurgical, pyrometallurgical and electrometallurgical methods. ... et al. A review on extractive metallurgy of tantalum and niobium. Hydrometallurgy 2020; 198: 105496. Crossref. Web of Science. Google Scholar. 11. Chen and Lin KY ...
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DOI: 10.1016/j.hydromet.2020.105496 Corpus ID: 225129305; A review on extractive metallurgy of tantalum and niobium @article{Shikika2020ARO, title={A review on extractive metallurgy of tantalum and niobium}, author={Alidor Shikika and Manivannan Sethurajan and Fabrice Muvundja and Mac C. Mugumaoderha and Stoyan Gaydardzhiev}, journal={Hydrometallurgy}, …
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A review of niobium-tantalum separation in hydrometallurgy: Authors: Ayanda, Olushola Sunday Adekola, Folahan A : Keywords: ... Abstract: Niobium and tantalum are chemically similar and are associated with each other in nature which makes it very difficult to separate. For many years, the separation of tantalum from niobium involved the ...
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Fusion and leaching processes are widely used in hydrometallurgical strategies along with solvent extraction and ion exchange …
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Hydrometallurgy, 2012. Tantalite ore from Mozambique was digested using molten ammonium bifluoride (NH 4 HF 2) as an alternative to hydrofluoric acid. Niobium and tantalum were extracted from the water-leached filtrate using 1 …
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Alkaline solution appears as an alternative medium for the hydrometallurgy of niobium and tantalum since these two elements exhibit a good solubility in alkaline solutions [Deblonde et al., 2015a ...
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Niobium (Nb; Z = 41) and tantalum (Ta; Z = 73) are two group V metals that recently received growing interest due to their numerous applications such as structural steels, pipelines, superalloys, cutting tools or catalysts.Contrary to vanadium (V; Z = 23), the lightest element of this family, the chemistry of niobium and tantalum is much less documented, albeit rich and …
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DOI: 10.1016/J.HYDROMET.2010.12.015 Corpus ID: 96737059; Solvent extraction technology for the separation and purification of niobium and tantalum: A review @article{Zhu2011SolventET, title={Solvent extraction technology for the separation and purification of niobium and tantalum: A review}, author={Zhaowu Zhu and Chu Yong Cheng}, …
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Abstract. Niobium and tantalum are chemically similar and are associated with each other in nature which makes it very difficult to separate. For many years, the separation of tantalum from niobium involved the fractional crystallization of potassium heptafluorotantalate away from potassium oxypentafluoroniobate monohydrate, this method has been supplanted by solvent …
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Niobium and Tantalum are sisters elements, that co-occurs in the same type of mineral deposits and that have very similar chemical properties. That is why both of these elements have …
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The separation of tantalum and niobium after NH4F·HF flux dissolution was investigated using three different separation methods, namely selective precipitation, solvent …
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Tantalum And Niobium Extraction And Separation Method. At present, in the field of hydrometallurgy, the methods for extracting and separating tantalum and niobium include fluorine complex salt step crystallization method, organic solvent extraction method, ion exchange method, chloride distillation method, selective reduction method, etc.
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One of the simplest methods for the breakdown treatment of primary concentrates of niobium and tantalum, particularly pyrochlore and columbite-tantalite, is direct reduction with aluminum or …
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Tantalum was separated from the rest of the mineral matrix by solvent extraction using methyl isoamyl ketone.The analytical results indicated that 98.9(9)% Ta 2 O 5 was recovered from the organic portion while 101.6(3)% Nb 2 O 5 and the rest of the elements were recovered from the aqueous solution. Niobium was subsequently separated from the tantalite …
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Like other economical metals, tantalum (Ta) and niobium (Nb) are broadly used in electronic and other high-tech industries.1‒4 TaNb concentrates are mainly composed of columbotabatlite (Fe,Mn) (Ta,Nb)2O6 and other classes of …
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A detailed review of the various processes involved in the breakdown treatment of niobium and tantalum primary sources, extraction and separation and newer processes of extraction as well …
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Zhao Mingzhi [23] treated titanium-tantalum-niobium ore with HF-H 2 SO 4 acid and improved the tantalum-niobium decomposition rate to more than 97% by reducing the particle size of the ore powder ...
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At present, most ores containing niobium and tantalum are decomposed by concentrated hydrofluoric acid. However, such an approach is only appropriate for high-grade niobium–tantalum ore, and special containers are required due to the remarkable corrosiveness of hydrofluoric acid (HF) (Miller, 1959, El-Hussaini, 2001, He et al., 1998a, Gupta and Suri, 1994a).
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[en] On-going technological developments, especially in the field of microelectronics and communication have reflected in concomitant increase in the demand for strategic metals such …
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Niobium and tantalum primary minerals are naturally occurring complex oxide ores, majorly of low grade deposits with chemical content of mainly Nb 2 /Ta 2 O 5 and oxides of Fe, Mn, Sn, Ti and other metal oxides. Over the decades, researchers have extensively and consistently investigated the extraction and recovery of Nb and Ta from primary mineral …
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This review paper discusses the extraction processes of niobium and tantalum, encompassing hydrometallurgical, pyrometallurgical and electrometallurgical methods. The hydrometallurgical approach discussed includes ore preparation, leaching, solvent extraction, solid–liquid separation, fractional crystallisation and precipitation. The pyrometallurgical …
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A Review of Niobium-Tantalum Separation in Hydrometallurgy Article in Journal of Minerals and Materials Characterization and Engineering · January 2011 DOI: 10.4236/jmmce.2011.103016 CITATIONS 7 ... Keyword: Niobium, Tantalum, Columbite, Tantalite, Solvent extractant and Solvent extraction. 1. INTRODUCTION
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Certain pyrometallurgical approaches for niobium (Nb) and tantalum (Ta) extraction have been studied and investigated by several researchers. ... 2011, Solvent extraction technology for the separation and purification of niobium and tantalum: A review, Hydrometallurgy, 107 (1–2), pp. 1–12. doi: Jo ur n al Pr e- pr oo f 10.1016/j.hydromet ...
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Niobium and tantalum are chemically similar and are associated with each other in nature which makes it very difficult to separate. For many years, the separation of tantalum from niobium involved the fractional crystallization of potassium heptafluorotantalate away from potassium oxypentafluoroniobate monohydrate, this method has been supplanted by solvent extraction …
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The recovery of niobium and tantalum from a low-grade niobium-tantalum ore by using highly concentrated caustic potash as an alternative to hydrofluoric acid has been investigated. Experiments on the leaching behavior of niobium and tantalum, as well as other associated impurities, such as titanium, iron, manganese, silicon, and aluminum were carried …
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Niobium and tantalum are located in the same group (VB) in the periodic table of the elements, and therefore they have very similar chemical properties, hence making it difficult to separate them from each other. ... Hydrometallurgy, 72 (3–4) (2004), pp. 259-267. Google Scholar. Hussaini et al., 2001. O.M.E. Hussaini, M.A. Mahdy, H. El.
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