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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 …
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technologicalandeconomicalchallenges. Very few detailed studies are reported on the hydrometallurgical recovery of niobium and tantalum from their minerals (Agulyanski,
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A Review of Niobium-Tantalum Separation in Hydrometallurgy Olushola S. Ayanda 1* and Folahan A. Adekola 2 1 Department of Chemistry, Faculty of Applied Sciences, Cape …
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Hydrometallurgy. Volume 64, Issue 3, June 2002, Pages 219-229. ... The niobium–tantalum raw material under study was selected from Kab Amiri. The ore was ground …
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A mixture of pure Ta2O5 and Nb2O5 was dissolved using two different fluxes, namely NH4F·HF and Na2HPO4/NaH2PO4·H2O. Selective precipitation and ion exchange …
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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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Treatment of fluorine-containing waste gas from hydrometallurgy of tantalum and niobium ore. Nonferrous Metals (1998) There are more references available in the full text …
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2020, Hydrometallurgy. Show abstract. On-going technological developments, especially in the field of microelectronics and communication have reflected in concomitant …
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Tantalum and niobium are frequently found together in nature and are simultaneously extracted from a variety of minerals (Roskill Information 10th ed., 2005a).The …
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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 …
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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 …
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EXTRACTION AND SEPARATION OF NIOBIUM AND TANTALUM 3.1 Processes of Extraction and Separation After the breakdown treatment, the mixed oxides of tantalum Ta2O5 and …
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Process development for the separation of niobium and tantalum from fluoride medium using trioctyl amine and application of Taguchi's method to optimize solvent extraction …
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The chemical study of niobium and tantalum elements shows that the decomposition of their ore involves a large number of procedures. Among them, alkali fusion …
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Recently, a new process for the leaching of low-grade refractory niobium–tantalum ores with KOH sub-molten salt was proposed with the objective to eliminate fluorine pollution …
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The industrial processes for recovery of niobium and tantalum oxides depend on hydrofluoric acid, which is a highly toxic and corrosive reagent with significant environmental …
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Pyrometallurgical processing is commonly used to convert Nb from pyrochlore into ferroniobium alloy through aluminothermic or carbothermic reduction. The hydrometallurgical …
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Tantalum and niobium belong with vanadium to group Vb on the periodic table. The two elements, (Nb and Ta) are a congeneric pair with very similar chemical properties. …
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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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The optimal conditions to achieve a niobium and tantalum extraction of 90 and 80%, respectively were as follows: HF concentration, ... Hydrometallurgy, 127–128 (2012), pp. 168 …
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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 …
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Studies on separation of niobium and tantalum from fluoride medium using trioctyl amine have shown that it is possible to obtain high purity niobium and tantalum (98.88% pure …
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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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Hydrometallurgy, 2014, 149: 31âˆ'40. [111] SHIKIKA A, SETHURAJAN M, MUVUNDJA F, MUGUMAODERHA M, GAYDARDZHIEV S. A review on extractive metallurgy …
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The acidity of the aqueous phase niobium solution was adjusted and then contacted with 2-octanol to extract niobium. Tantalum and niobium were stripped from the organic phase with …
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Niobium and tantalum processing in oxalic-nitric media: Nb 2 O 5 ·nH 2 O and Ta 2 O 5 ·nH 2 O precipitation with oxalates and nitrates recycling. ... Hydrometallurgy, Volume …
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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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Pyr-ometallurgical processing is commonly used to convert Nb from pyro-chlore into ferroniobium alloy through aluminothermic or car-bothermic reduction. The hydrometallurgical methods are …
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The pyrometallurgical methods of the recovery of various critical metals have been established. Certain pyrometallurgical approaches for niobium (Nb) and tantalum (Ta) …
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A review of niobium-tantalum separation in hydrometallurgy. J. Miner. Mater. Charact. Eng. 10:03 (2011), 245–256, 10.4236/jmmce.2011.103016. S. Ayanda, O., A. Adekola, F., Leaching of a …
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Advancements in the extraction of niobium and tantalum: Innovative strategies in hydrometallurgical processes. Author links open overlay panel Darwin Michell Cheje Machaca, …
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2018. 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 …
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Newly hydrolysed precitate of niobium and tantalum can be dissolved in oxalic acid solutions to form (NbO(C 2 O 4) 2) − and (TaO(C 2 O 4) 2) − complexes, which are stable in …
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