Extractive metallurgy of columbite-tantalite ore: A detailed …
Abstract. The increased demand of metals such as tantalum (Ta) and niobium (Nb) reflect the on-going development in modern science, engineering and technology. The extraction of these two metals ...
Pyrometallurgical Approach in the Recovery of Niobium and Tantalum …
The pyrometallurgical methods of the recovery of various critical metals have been established. Certain pyrometallurgical approaches for niobium (Nb) and tantalum (Ta) extraction have been studied and investigated by several researchers. For instance, the conventional reduction of Nb mineral or Nb2O5 to Nb metal has been conducted over …
Direct precipitation of niobium and tantalum from
Introduction. Niobium (Z = 41) and tantalum (Z = 73) are two valuable metals that are useful for many applications.Niobium is mainly consumed for the production of ferroniobium alloys but it is also used to produce superconducting magnets, electronic components, catalysts, medical implants, commemorative coins etc. (Roskill Information …
Separation of niobium and tantalum from Mozambican …
Niobium and tantalum were extracted from the water-leached filtrate using 1- and 2-octanol as extractants. The main process variables are time, temperature and the bifluoride-to-ore mass ratio, for the bifluoride treatment step, ... Hydrometallurgy, Volume 165, Part 2, 2016, pp. 345-350.
Modern Tantalum and Niobium Industry in China
The tantalum and niobium industry in China was established in the later years of the 1950s. In 1956, the research institutes and semi-industrial experimentation workshops founded in Beijing started research into tantalum-niobium separation and production of tantalum metal. Since 1956, tantalum and niobium mines were built in …
A review of tantalum resources and its production
Hydrometallurgy, 2014, 149: 31âˆ'40. [111] SHIKIKA A, SETHURAJAN M, MUVUNDJA F, MUGUMAODERHA M, GAYDARDZHIEV S. A review on extractive metallurgy of tantalum and niobium [J]. Hydrometallurgy, 2020, 198: 105496. [112] KIM B S, CHOI Y Y. Kinetics of the chlorination reaction of tantalum pentoxide with carbon …
Solubility of niobium (V) and tantalum (V) under mild …
1. Introduction. 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 …
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 …
Direct precipitation of niobium and tantalum from alkaline …
The recovery of niobium and tantalum from alkaline solutions has been investigated. We showed that, instead of neutralizing the Nb and Ta solutions by mineral acids, calcium-bearing reagents can be used to quantitatively precipitate Nb and Ta. ... Hydrometallurgy, 156 (2015), pp. 99-106, 10.1016/j.hydromet.2015.05.015. View PDF …
Green extraction of Niobium and Tantalum from Kenticha Tantalite ore
Niobium and tantalum were extracted from their neutralized alkaline dissolved and hydrolyzed solution by a new process using the EMIC/AlCl3 ionic liquid as the extractant using selective stripping ...
(PDF) Sulfuric acid leaching of Kab Amiri niobium–tantalum …
PII: S 0 3 0 4 - 3 8 6 X ( 0 2 ) 0 0 0 4 5 - 2 220 O.M. El-Hussaini, M.A. Mahdy / Hydrometallurgy 64 (2002) 219–229 methods that was adopted on an industrial scale to achieve simultaneous breakdown of columbite –tantalite and upgrading niobium and tantalum values (ElHussaini, 1996; Eckert, 1995).
A Review of Niobium-Tantalum Separation in Hydrometallurgy
A Review of Niobium-Tantalum Separation in Hydrometallurgy. O. Ayanda, F. A. Adekola. Published 5 March 2011. Engineering, Materials Science. Journal of Minerals and Materials Characterization and Engineering. Niobium and tantalum are chemically similar and are associated with each other in nature which makes it very difficult to …
Process development for the separation of niobium and tantalum …
Niobium and tantalum have a wide range of application in various industries such as steel and electronic industry. The conventional tributyl phosphate based solvent extraction process for producing pure niobium and tantalum generates solid waste which is a mixture of fluoride with other anions like sulphate, chloride and acetate. This waste …
Possible methodology for niobium, tantalum and scandium …
The columbite found in Brazil is normally mined for its rich niobium content (31–79% Nb 2 O 5) (Pohl, 2011) and not necessarily for its smaller amounts of tantalum. The chemical characterization of the these minerals also indicate the presence of moderate quantities of iron and titanium, as well as small quantities of scandium (0.135%) and ...
Solvent extraction technology for the separation and …
Semantic Scholar extracted view of "Solvent extraction technology for the separation and purification of niobium and tantalum: A review" by Zhaowu Zhu et al. Skip to search form ... separation and purification of niobium and tantalum: A review}, author={Zhaowu Zhu and Chu Yong Cheng}, journal={Hydrometallurgy}, year={2011}, …
Non-fluoride dissolution of tantalum and niobium oxides …
DOI: 10.1016/J.HYDROMET.2017.08.018 Corpus ID: 103996742; Non-fluoride dissolution of tantalum and niobium oxides and their separation using ion exchange @article{Nete2017NonfluorideDO, title={Non-fluoride dissolution of tantalum and niobium oxides and their separation using ion exchange}, author={M. Nete and Walter Purcell …
Solvent extraction technology for the separation and
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 ...
Tantalum (V) and niobium (V) extraction by octanol
The results showed that the tantalum extraction rate and tantalum and niobium separation factors were above 94% and 200, respectively, and the purity of potassium fluotantalate met the ...
ORBi: Detailled Reference
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 ...
Sulfuric acid leaching of low-grade refractory tantalum–niobium …
2.1 Materials. The niobium–tantalum minerals in this study were obtained from Panxi area of China. The ore was ground in a disk grinder to −74 μm. The mineralogical composition was analyzed by mineral liberation analyzer (MLA650) automated quantitative system, and the chemical analysis of the typical ore sample is …
Solvent extraction technology for the separation and …
In this paper, solvent extraction technology for the separation and purification of niobium and tantalum has been extensively reviewed. Although a variety of solvents have been investigated for niobium and tantalum solvent extraction, only four have been commercially used in the production of niobium and tantalum from their raw materials. …
A review on extractive metallurgy of tantalum and niobium
The most impressive result was obtaining 70 mL of high purity niobium solution of tantalum content 0.027 ppm (in relation to Nb) with 88.4% yield of niobium from a solution of Nb:Ta, weight ratio ...
A review of niobium-tantalum separation in hydrometallurgy
Olushola, Ayanda S. & Folahan, Adekola A. (2011). A review of niobium-tantalum separation in hydrometallurgy. Journal of Minerals and Materials Characterization and Engineering, 10(3): 245-256: Abstract: Niobium and tantalum are chemically similar and are associated with each other in nature which makes it very difficult to separate.
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Solvent extraction technology for the separation and purification of niobium and tantalum: A review, Hydrometallurgy. 2011;107:1‒12. 2011;107:1‒12. This is an open access article distributed under the terms of the, which permits unrestricted use, distribution, and build upon your work non-commercially.
Leaching of a low-grade niobium–tantalum ore by highly concentrated
The reactions of niobium–tantalum ore with KOH solution are as follows (Orekhov and Zelikman, 1963, Zelikman and Orekhov, ... In this paper, a hydrometallurgy process was investigated for recovering rare earths (REs) and niobium (Nb) from a potash feldspar ore beneficiation tailings. Firstly, the REs and Nb could be leached from potash ...
Review Solvent extraction technology for the separation …
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.
Separation and isolation of tantalum and niobium from …
Hydrometallurgy method consisting of acid/alkaline leaching followed by solvent extraction is commonly employed to recover these metals from the niobium-tantalum minerals . ...
Separation of niobium and tantalum using continuous
The feed solution for tantalum extraction was obtained from the ore dissolver unit, which has a composition of 1.08–1.29 mol/L niobium, 0.33–0.38 mol/L tantalum, 0.44–0.62 mol/L iron, and 0.29 mol/L manganese, along with traces of titanium and silica dissolved in 9.5–10 M (free acidity) hydrofluoric acid.
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 …
A kinetic study of the leaching of a low-grade niobium–tantalum …
The reactions of niobium–tantalum ore with KOH solution are as follows (Orekhov and Zelikman, 1963, ... Treatment of fluorine-containing waste gas from hydrometallurgy of tantalum and niobium ore. 4, pp. 141–142 (in Chinese). Google Scholar. Gupta and Suri, 1994a. C.K. Gupta, A.K. Suri. Extractive Metallurgy of Niobium, …