niobium tantalum hydrometallurgy in Oman
Efficient Recovery of Niobium and Tantalum from Ferrocolumbium Tantalum
2.1 Materials. The FT used in the experiment was acquired from a tantalum–niobium smelter in Guangdong province. The chemical composition shown in Table 1 indicates that the alloy mainly contains Si, Fe, Nb, and Ta, in addition to a small amount of MgO, Al 2 O 3, MnO 2, and ThO 2.The characterization of FT is given in Fig. …
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Separation of niobium and tantalum from Mozambican …
Treatment of fluorine-containing waste gas from hydrometallurgy of tantalum and niobium ore. Nonferrous Metals 50 (4), 141–142. Maiorov, V.G., Nikolaev, A.I., Kopkov, V.K., 2001. Extraction Recovery of Tantalum(V) and niobium(V) from hydrofluoric and hydrofluoric–sulfuric acid aqueous solutions with octanol. Russ.
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A Review on the Separation of Niobium and Tantalum by Solvent
Niobium and tantalum are found together in natural minerals. Leaching with concentrated acid solution or alkaline roasting followed by water/dilute acid leaching results in a solution containing these two metals. In this work, we reviewed the extraction and separation of Nb(V) and Ta(V) from leach liquors in the absence and presence of ...
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A Review of Niobium-Tantalum Separation in Hydrometallurgy
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 …
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Factors and challenges in the recovery of niobium and …
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 …
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A review on extractive metallurgy of tantalum and niobium
Three main types of Ta and Nb deposits exist (Linnen et al., 2013; Melcher et al., 2017) which could be grouped as: (i) carbonatites and associated rocks (pyrochlore: rich in Nb), (ii) alkaline to peralkaline granites and syenites (rich in Ta, Nb and rare earth elements), and (iii) granites and pegmatites of the lithium, caesium and tantalum (LCT) …
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Extraction of niobium and tantalum from ferrocolumbite by hydrofluoric
Other authors investigated the recovery of niobium and tantalum from ore by using highly concentrated caustic potash as an alternative to hydrofluoric acid and they concluded that almost complete extraction of both niobium and tantalum is achieved at temperatures above 300 °C (Wang et al., 2009, Zhou et al., 2005).
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Hydrometallurgical Separation of Niobium and Tantalum: A …
The separation of tantalum and niobium after NH4F·HF flux dissolution was investigated using three different separation methods, namely selective precipitation, …
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A review on extractive metallurgy of tantalum and niobium
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 Nigerian columbite in hydrochloric acid: dissolution kinetics. ... Llorens González, T., et al. Tin-tantalum-niobium mineralization in the Penouta deposit ...
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Solvent extraction technology for the separation and …
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 …
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A review on extractive metallurgy of tantalum and niobium
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 …
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Pyrometallurgical Approach in the Recovery of Niobium and Tantalum
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 mineral. 1‒7 Ethiopia has world class tantalite deposits, which are found only in some countries of the world such as …
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Separation and isolation of tantalum and niobium from …
1. Introduction. Tantalum and niobium are frequently found together in nature and are simultaneously extracted from a variety of minerals (Roskill Information 10th ed., 2005a).The most abundant Nb and Ta containing mineral is columbite–tantalite (Fe,Mn)(Nb,Ta) 2 O 6. The Nb rich mineral columbite normally contains 5–30% Ta 2 O 5 …
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Extraction of Niobium and Tantalum from Nitrate and …
The niobium–tantalum ore material obtained from Ras Baroud locality in the central Eastern Desert of Egypt, consists mainly of two minerals namely: columbite and alvarolite. The extractive separation of niobium(V) and tantalum(V) from the acid media HF–HNO3 or HF–H2SO4 have been worked out using methyl isobutyl ketone (MIBK) as …
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Separation and isolation of tantalum and niobium from …
A step-wise separation process for niobium and tantalum from tantalite by extraction and ion exchange was developed. A tantalite mineral was dissolved by a fusion technique using ammonium ...
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Liquid–liquid extraction of niobium and tantalum from …
DOI: 10.1016/S0304-386X(03)00179-8 Corpus ID: 97675295; Liquid–liquid extraction of niobium and tantalum from aqueous sulphate/fluoride solutions by a tertiary amine @article{Hussaini2004LiquidliquidEO, title={Liquid–liquid extraction of niobium and tantalum from aqueous sulphate/fluoride solutions by a tertiary amine}, …
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A Review of Niobium-Tantalum Separation in Hydrometallurgy …
A Review of Niobium-Tantalum Separation in Hydrometallurgy
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Separation and isolation of tantalum and niobium from …
DOI: 10.1016/J.HYDROMET.2014.06.006 Corpus ID: 93602526; Separation and isolation of tantalum and niobium from tantalite using solvent extraction and ion exchange @article{Nete2014SeparationAI, title={Separation and isolation of tantalum and niobium from tantalite using solvent extraction and ion exchange}, author={M. Nete and …
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Hydrometallurgical Process for Tantalum Recovery from …
The Tantalum–Niobium International Study Center (TIC) indicates that the global production of tantalum was 2800 tons in 2014, and at that time, it was sourced from 1400 tons of tantalum mineral concentrate, ... Hydrometallurgy. 2002; 64:219–229. doi: 10.1016/S0304-386X(02)00045-2.
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A Review of Niobium-Tantalum Separation in Hydrometallurgy
A detailed review of the various processes involved in the breakdown treatment of niobium and tantalum primary sources, extraction and separation and …
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Leaching of a low-grade niobium–tantalum ore by highly concentrated
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 …
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A review on extractive metallurgy of tantalum and niobium
Hydrometallurgy 198; DOI:10.1016/j ... It is of great practical significance to reduce the radioactive hazard of waste tantalum-niobium slag and to strengthen the sustainable utilization of ...
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Niobium and tantalum processing in oxalic-nitric media: …
Recent progress in the hydrometallurgy of Nb and Ta also highlighted the potential of oxalate-nitrate media for the separation of Nb and Ta. Nonetheless, the resulting purified aqueous solutions, containing Nb or Ta in HNO 3-H 2 C 2 O 4 mixtures, need to be further processed in order to yield Nb and Ta solid products that can be commercialized ...
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A Review of Niobium-Tantalum Separation in …
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 as...
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Separation and isolation of tantalum and niobium from …
Separation and isolation of tantalum and niobium from tantalite using solvent extraction and ion exchange M. Netea,W.Purcella,⁎,J.T.Nelb a Department of Chemistry, University of the Free State, Bloemfontein 9300, South Africa b The South African Nuclear Energy Corporation SOC Ltd. (Necsa), P.O. Box 582, Pretoria 0001, South Africa article info …
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Extractive metallurgy of niobium | Semantic Scholar
The industrial processes for recovery of niobium and tantalum oxides depend on hydrofluoric acid, which is a highly toxic and corrosive reagent with significant …
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A Review of Niobium-Tantalum Separation in …
The document is a review article that discusses processes for separating niobium and tantalum. It begins with an introduction to niobium and tantalum. The main processes discussed are: 1) Breakdown treatment …
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A Review of Niobium-Tantalum Separation in Hydrometallurgy
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 …
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A Review of Niobium-Tantalum Separation in Hydrometallurgy
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 …
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A Review of Niobium-Tantalum Separation in …
A Review of Niobium-Tantalum Separation in Hydrometallurgy Olushola S. Ayanda1* and Folahan A. Adekola2 1Department of Chemistry, Faculty of Applied Sciences, Cape Peninsula University of Technology, P.O. Box 652, Cape Town, South Africa. 2Department of Chemistry, University of Ilorin, P.M.B 1515, Ilorin, Nigeria.
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