Keywords: tantalite; beneficiation; magnetic separation; acid leaching 1. Introduction The production of pure tantalum and niobium metals from mineral ore entails the removal of associated impurities and the subsequent separation of these metals from each other. The successful beneficiation of tantalum and niobium ores may vary significantly.
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Mozambique's mineral sector hold a significant position in global production, especially in Aluminium, Beryllium, and Tantalum. In 2006, Mozambique contributed 6% to the world's Tantalum production, 5% to Beryllium, and 2% to Aluminium. The Mozal smelter plays a major role in manufacturing despite limited employment impact. The mining ...
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Qualitative analysis of three mineral samples from northern Mozambique was accomplished by X-ray diffraction (XRD), microscopy, scintillation, and magnetic …
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The principal aim of this research was to determine the optimum conditions of extraction and separation of niobium and tantalum with octanol as solvent, from Mozambican tantalite using …
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Schappmann, J. (2005): Die gruben Morrua, Marropino und Maria III in der Pegmatitregion Alto Ligonha im Norden von Mozambique. Mineralien-Welt 16 (2): 34-46 ⓘ Murrua (Morrua; Morrua Mine) Schappmann, J. (2005): Die gruben Morrua, Marropino und Maria III in der Pegmatitregion Alto Ligonha im Norden von Mozambique. Mineralien-Welt 16 (2): 34-46
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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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Characterization and alternative dissolution of tantalite mineral samples from Mozambique. Journal of the Southern African Institute of Mining and Metallurgy, Jan 2012 M. Nete, W. Purcell, E. Snyders, J.T ... 5 ± 0.2% Nb2O5 and 100.4 ± 0.3% Ta2O5.Keywords : tantalum; niobium; qualitative; dissolution; quantitative; analysis; recovery; ICP-OES..
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@ 23% tantalum) and assuming recovery rates in the range of 40 – 50% as well as ore grades in the range of 185 – 300 g/t tantalum. P. Schütte and U. N ¨
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A new process is proposed for the leaching and recovery of niobium and tantalum from a low-grade refractory niobium–tantalum ore after adding pure Nb2O5 to adjust the niobium to tantalum ratio.
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Further, the beneficiation process routes of these minerals may vary ranging from ore pre-concentration, ore primary concentration and concentrate clean-up processes (Adetunji et al. 2005;Berhe et ...
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Tantalite ore from Mozambique was digested using molten ammonium bifluoride (NH4HF2) as an alternative to hydrofluoric acid. Niobium and tantalum were extracted from the water-leached filtrate ...
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A tantalite sample (Sample A) from Mozambique was supplied by the South African Nuclear Energy Corporation Limited (Necsa). ... (Bad Harzburg, DE), 1993, "Process for the recovery and separation of tantalum and niobium", United States Hermann C. Starck & Co. KG (Berlin, DE) 5209910 [cited 2012 March 16]. ... Extractive recovery of ...
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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 …
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Qualitative analysis of three mineral samples from northern Mozambique was accomplished by X-ray diffraction (XRD), microscopy, scintillation, and magnetic determination. Chemical …
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Elections 2023-2024 - Bulletin on the Political Process in Mozambique 351 – 12 December 2024 2 by ministers of the Joaquim Chissano government. The other is owned by EDM, the state-owned electricity company. The shutdown reduced election supplies to …
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The tantalum-niobium-tin ore beneficiation test conducted by the Forui Machinery Plant for a Nigerian customer. This test mainly uses processes such as ore washing, screening, and jigging. The obtained concentrate …
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A new process is proposed for the leaching and recovery of niobium and tantalum from a low-grade refractory niobium–tantalum ore after adding pure Nb2O5 to adjust the niobium to tantalum ratio.
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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-and 2-octanol as extractants.
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Noventa, a Jersey-based company focusing on tantalum mining in Mozambique, plans to have two mines in the country at full production of tantalum – a rare speciality metal widely used in the consumer electronics industry – before the end of 2011. In an interview with Mining Review Africa, company chairman Eric Kohn says that the company intends to bring its …
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In 2022, Mozambique planned to produce 251.3 tonnes of tantalite, while in 2021 it mined just 178.5 tonnes and in 2020 just over 209 tonnes. "The level of tantalite production up to the first half of 2023 stood at 51 per cent of what was planned, and it is expected to continue on the same trend until December," the government explains in ...
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Developing an efficient recycling route for spent single-use medical devices is essential for recovering precious metals. The proposed complete hydrometallurgical route goes through the initial pyrolysis and acid digestion steps, expanding upon our previous relevant work in the field, followed by solvent extraction, stripping, and precipitation procedures. In this study, …
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The conditions were found for separation of tantalum(V) and niobium(V) from titanium(IV), allowing recovery of 95.7 and 84.1% of tantalum and niobium fluoride complexes, respectively, in one ...
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This study evaluates coltan production and trade dynamics in Africa's Great Lakes region from artisanal and small-scale mining.
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Tantalum recoveries of between 75(10) and 90(6)%were obtained for TAN-1CRM(Ta present as Ta2O5) and 95(6)%for Ta2O5 with Li2B4O7 as fluxing agent on the removal of the excess of boric acid prior ...
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Conclusions The process described allows the synthesis of niobium oxides and tantalum salts from a slag obtained in a pyrometallurgy process of tin production from mining tailings containing mainly cassiterite and columbo tantalite. The …
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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- and 2-octanol as extractants. The main process variables are time, temperature and the bifluoride-to-ore mass ratio, for the bifluoride treatment step, along with …
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Tantalum and niobium are extracted from a variety of minerals and concentrates. The major source of niobium and tantalum is columbite-tantalite, also called coltan, with a general chemical formula (Fe,Mn)(Nb,Ta) 2 O 6.The two elements also exist in more than 150 other minerals and are usually present as complex metal oxides and hydroxides with the exception of behierite, …
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best conditions for the recovery process in order to obtainhigh grade and recovery values. T he recovered minerals could be separated using aliquat 336 ionic liquid and amberlite anion exchanger.
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The developed process works at room temperature, low acidity ([H + ] < 1 M), exhibits high recovery yields, and allows producing Nb 2 O 5 •nH 2 O with purity higher than 99.5 %. The process also yields a tantalum product (Ta 2 O 5 •nH 2 O with >20 wt% Ta) even when starting from a diluted feed (39 ppm Ta).
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This work aims at recovery of tantalum and niobium from Abu Dabbab deposits at the Eastern Desert of Egypt. The beneficiation was successfully performed using shaking table concentrator and carpco ...
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The corrosive and volatile nature of chlorinating agents used in the chlorination process of columbite-tantalite complicates the process ... quartz, mica, accessory garnet, and tourmaline from Mozambique were reported by Nete et al. (2012).The XRD, microscopy ... The development of the recovery of tantalum and niobium from columbite and ...
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The proposed mechanized techniques were found to increase the efficiency of tin and tantalum recovery from 60.75% to 81.85% and from 22.9% to 48.57%, respectively, and the grades of the tin and ...
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