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Hydrometallurgy aims to compile studies on novel processes, process design, chemistry, modelling, control, economics and interfaces between unit operations, and to provide a forum for discussions on case histories and operational difficulties. Topics covered include: leaching of metal values by chemical reagents or bacterial action at ambient or elevated …
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Read the latest articles of Hydrometallurgy at ScienceDirect, Elsevier's leading platform of peer-reviewed scholarly literature
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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 …
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Tantalum and niobium are important rare refractory metals with high melting points, corrosion resistance, and good machining performance [1,2].They are widely used in electronics, metallurgy, iron and steel, the chemical industry, carbide, and other technical fields [].The properties of niobium and tantalum and their compounds are very stable, …
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A Review of Niobium-Tantalum Separation. 251. The pure tantalum in the form of H2TaF7 was then finally stripped with de-mineralized water. On completion of the extraction of …
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Abstract. Removal of heavy metal ions from wastewater is of prime importance for a clean environment and human health. Different reported methods were devoted to heavy metal ions removal from ...
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Niobium and tantalum are valued for their uses in nuclear, steel, aviation and electronics industries. This paper elucidates the development of a multistage counter-current separation process for obtaining pure niobium and tantalum from the hydrofluoric acid solution of Coumbite-Tantalite ore (leach liquor), with ctyl amine (TOA) as the …
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Zhu, Z. & Cheng, C. Y. Solvent extraction technology for the separation and purification of niobium and tantalum: A review. Hydrometallurgy 107, 1–12 (2011). Article CAS Google Scholar
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Solvent extraction technology for the separation and purification of niobium and tantalum: A review. Hydrometallurgy (2011) M.H. Rodriguez et al. Extraction of niobium and tantalum from ferrocolumbite by hydrofluoric acid pressure leaching. ... Hydrometallurgy, Volumes 144–145, 2014, pp. 195-206.
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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 READS 879 2 authors: Dr Olushola Sunday Ayanda Federal University Oye-Ekiti 43 PUBLICATIONS 143 CITATIONS SEE PROFILE …
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Niobium and tantalum demand have increased since 2021 as the steel industry became to recover from the COVID-19 pandemic, leading to an increasement in global production of both metals in 2022 to ...
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A Review Approaches for Extractive hydrometallurgy of niobium and tantalum from Ethiopian Kenticha Ores Abstract . The Kenticha rare-element pegmatite, …
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O. Ayanda and F. Adekola, "A Review of Niobium-Tantalum Separation in Hydrometallurgy," Journal of Minerals and Materials Characterization and Engineering, Vol. 10 No. 3, 2011, pp. 245-256. doi: 10.4236/jmmce.2011.103016. Cited by [1] The Energy Cost of Extracting Critical Raw Materials from Tailings: The Case of Coltan ...
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Battery energy storage systems (BESS) are an essential component of renewable electricity infrastructure to resolve the intermittency in the availability of renewable resources. To keep the global temperature rise below 1.5 °C, renewable electricity and electrification of the majority of the sectors are a key proposition of the national and …
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... The direct alkali leaching of a fergusonite ore using KOH led to up to 99% extraction of Nb and Ta, being a cleaner method in …
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Solvent Leaching. In hydrometallurgy, leaching (solid–liquid extraction) mainly involves: (1) mineral acids such as H 2 SO 4, HNO 3, or HCl, (2) bases such as NH 3 or NaOH, or (3) chelating agents such as EDTA or citric acid. These lixiviants are used in diluted or concentrated forms.
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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 …
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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 from columbite-tantalite ore is based on generic extractive metallurgy. However, the upstream purification of ore and downstream extraction of Ta …
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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) ... Green extraction of …
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The increased demand of metals such as tantalum (Ta) and niobium (Nb) reflect the on-going development in modern science, engineering and technology. ... A review on extractive metallurgy of tantalum and niobium. 2020, Hydrometallurgy ... Hydrometallurgy, Volume 165, Part 2, 2016, pp. 345-350 ...
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Hydrometallurgy (2020) H. Sun et al. Co-volatilizing-water leaching process for efficient utilization of rhenium-bearing molybdenite concentrate. Hydrometallurgy ... Niobium oxide mineral flotation: A review of relevant literature and the current state of industrial operations. International Journal of Mineral Processing, Volume 137, 2015, pp ...
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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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This review presents an overview of the currently mined tantalite ores in Ethiopia (in particular Kenticha ores) and potentialities to extract niobium (Nb) and tantalum (Ta) products using green technologies. The foremost source of niobium and tantalum is the columbite-tantalite mineral or "coltan". Since hydrometallurgical methods are
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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 Peninsula University of
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The niobium-loaded organic solution was scrubbed with a solution containing 0.9 M niobium. The niobium was then stripped with water (Maiorov and Nikolaev, 2002). The solubility of 1-OCL is 5% which is much higher than that of 2-OCL of < 0.1% (w/w). This is probably the main reason why 2-OCL, instead of 1-OCL, is selected for commercial …
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Niobium and tantalum were then neutralized using 28% ammonium hydroxide. The precipitate obtained was dried and placed in a muffle furnace for 4 hours at 900°C. After calcinations, pure tantalum pentoxide and niobium pentoxide were obtained and characterized using XRD and SEM. Tantalum pentoxide and niobium pentoxide
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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 version of this article. Cited by (74) ... This review study is therefore based on the factors/challenges relating to the beneficiation, Nb/Ta extraction and recovery from ...
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Demand for niobium and tantalum is increasing exponentially as these are essential ingredients for the manufacture of, among others, capacitors in technological devices and ferroniobium. ... A …
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CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): 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 …
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Treatment of fluorine-containing waste gas from hydrometallurgy of tantalum and niobium ore. Nonferrous Metals, 50 (4) (1998), pp. 141-142. CrossRef Google ... Solvent extraction technology for the separation and purification of niobium and tantalum: a review. Hydrometallurgy, 107 (1–2) (2011), pp. 1-12. View PDF View article View in …
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A Review of Niobium-Tantalum Separation in Hydrometallurgy. Olushola S. Ayanda1* and Folahan A. Adekola2. Department of Chemistry, Faculty of Applied Sciences, Cape Peninsula University of Technology, P.O. Box 652, Cape Town, South Africa. 2 Department of Chemistry, University of Ilorin, P.M.B 1515, Ilorin, Nigeria.
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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.
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Process Applications and Challenges in Mineral Beneficiation and Recovery of Niobium from Ore Deposits – A Review. Mineral Processing and Extractive Metallurgy Review, 2022. DOI: 10.1080/08827508.2021.1964965. [7] Separation and extraction of niobium from H2SO4 solution containing titanium and iron impurities.
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Various metallurgical processes of scandium recovery from various resources, such as ores of scandium, rare earths, uranium, aluminium, titanium, tungsten, nickel, tantalum and niobium are reviewed. Considering the scandium content and the availability, bauxite residues (red mud) and nickel laterite ores are the most promising …
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