Separation of Radioactive Elements from Ethiopian Kenticha …
The leaching and extraction behavior of uranium and thorium from a high-grade Ethiopian pegmatite ore in a mixture of hydrofluoric acid and sulfuric acid has been investigated. The effects of variables such as the temperature, particle size, acid concentration, and leaching time were studied. The leaching efficiency of uranium increased with increasing temperature to …
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Experimental studies of Ta2O5 and columbite–tantalite …
Experiments were also carried out on the solubility of natural columbite–tantalite in fluoride (HF, KF, NaF), carbonate (NaHCO 3, Na 2 CO 3), and HCl solutions with concentrations from 0.01 to 2 m at 300, 400, and 500°C and 50 and 100 MPa in the presence of oxygen buffer Co–CoO and in HF solutions with concentrations from 0.01 to 2 m at ...
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Q: What is electrostatic separation in ore concentration?
In ore concentration, it's often used to separate valuable minerals from their ore bodies. ... Columbite-Tantalite, Ilmenite, and Garnet. It is also used to separate metallic conductors like Wolframite, etc. This process can reduce the amount of mining waste considerably and improve the ore quality, making it an environmentally friendly method ...
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Extractive metallurgy of columbite-tantalite ore: A detailed …
Nete and Purcell (2016) proposed a complete beneficiation of tantalite ore that includes traditional magnetic separation and acid treatment methods, along with fusion digestion with NH 4 F·HF and solvent extraction using 5-methyl-2-hexanone.
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(PDF) Optimization of the tantalum ore production by control …
A new process is proposed for refining niobite ore that is found in Jiangxi province of China. Niobite, also known as columbite or niobite–tantalite, is a mineral that contains tantalum and niobium.
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Radionuclides and Radiation Exposure in Tantalite Mining, …
Tantalite and columbite ores have been reported as containing associated primordial radionuclides, such as uranium and thorium. Ethiopia is one of the world suppliers …
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A review on extractive metallurgy of tantalum and niobium
Decomposition of the Kenticha mangano-tantalite ore by HF/H 2 SO 4 and KOH fusion. Physicochem. Probl. Min. Process. ... Nb, and Ta. ICP results combined with XPS quantitative analysis showed that with the increase of HF concentration, the leaching rate of Nb and Ta increased, and the bridging F existing on the mineral surface would be ...
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Separation of Radioactive Elements from Ethiopian Kenticha …
It is often time referred to as tantalite [(Fe,Mn)(Ta,Nb) 2 O 6 ] when Ta 2 O 5 content in the mineral ore is significantly greater than Nb 2 O 5 [4]; and at times, referred to as columbite ...
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Tantalite – Knowledge and References – Taylor & Francis
Granitic pegmatite hosted tantalite deposit at Kenticha is being mined by an open pit mining method. Currently, loose and medium grade weathered ore is under mining without proper bench design. This led to unsystematic extraction of ore, mainly high-grade ore. Dilution during mining is expected to be about 5% which is not considered high.
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Beneficiation of Niobium and Tantalum from Tantalite Ore …
Size reduction with gravity and magnetic separation followed by dissolution of raw columbite-tantalite are common in industrial practices for increasing the concentration of Ta and Nb in ore (Nete ...
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tantalite: Topics by Science.gov
Mineral assemblages in the ore concentrates, major and trace element concentration patterns, and zoning characteristics in the different pegmatites from Africa distinctly differ from each other. Chondrite-normalized REE distribution patterns vary significantly between columbite, tantalite, and microlite, and also relative to major element ...
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Geology, geochemistry and genesis of tantalite deposit of …
Tantalum is the most important valuable raw-material in electronic, medical and chemical industries.The Kenticha rare-element granite pegmatite in the Neoproterozoic Adola Belt of southern Ethiopia, is a subhorizontal sheet-like structurally controlled intrusive body, is an important source of tantalite, niobite and beryl where tantalite is currently mined and …
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Hydrometallurgical assessment of oxides of Nb, Ta, Th and U …
The nature of the ore, or the concentration of value metals and impurities in this case U, Th, Fe, Ti, and Si, determines the hydrometallurgical properties of tantalite ore. ... In comparison to tantalite ore (parent ore, sample 1), this study revealed that Th and U oxides decreased to 3.03% and 0.81% (0.01 wt%), respectively, ...
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A study of the kinetics of the dissolution of a Nigerian tantalite ore …
Experiments on the kinetics of dissolution of a Nigerian tantalite ore in hydrochloric acid medium have been undertaken. The effects of temperature, acid concentration, stirring rate and particle size on the dissolution rate have been investigated. Physicochemical characterization of this ore, such as moisture content, loss of mass on ignition, pH and the …
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Optimization of Tantalite Ore Dissolution Using …
The difference between the initial and final weights indicated the amount of undissolved tantalite ore. Results: Ore characterization results revealed high concentration of tantalum (34.17%), iron (12.55%), niobium (8.38%), and titanium (6.01%), with other elements present in smaller amounts. Optimal conditions were found to be 8 M HF, 0.5 M ...
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Investigation of Dissolution Kinetics of A Nigerian Tantalite Ore …
The effects of some parameters such as acid concentration, contact time, temperature, particle size and the stirring rate on dissolution action have been investigated. ... [H+] action, with reaction order of 0.64. About 81.3% of tantalite ore was dissolved within 120min., using 8.06M HNO3 solution with 0, 2.55A0 and 1.74A00 The ore is not ...
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Investigation of Dissolution Kinetics of A Nigerian …
The effects of some parameters such as acid concentration, contact time, temperature, particle size and the stirring rate on dissolution action have been investigated. ... Fig. 2: Fraction of tantalite ore dissolved (X) vs time at different concentrations of HNO 3. Experimental conditions: Mass of tantalite ore used = 0.5g, ...
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Tantalite Solubility in Granitoid Melts and Evaluation of the …
Abstract The paper presents experimental data on tantalite solubility in water-saturated granitoid melts with various alumina and alkaline elements concentrations at T = 650–850°C and P = 100 MPa. The maximum Ta concentration (effective solubility) in melt is shown to be always higher than the Nb concentration. As the melt composition is changed …
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Alternative beneficiation of tantalite and removal of …
concentrating tantalite ore are gravity and magnetic separa-tions. Secondary ore concentration stages are generally re-quired to increase the content of Ta2O5 before further processing to recover Ta and Nb and to remove associated Ta-bearing minerals, impurities, and radioactive elements to acceptable levels [1–2,18].
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Preconcentration of Low-Grade Ta–Nb Deposit Using …
Ore from the Jinzhulong Ta–Nb deposit was processed using a combination of gravity concentration and magnetic separation to upgrade the columbite–tantalite fines.
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PHYSICOCHEMICAL PROBLEMS OF MINERAL …
Title: Decomposition of the Kenticha mangano-tantalite ore by HF/H2SO4 and KOH fusion Authors: Goitom Gebreyohannes Berhe, Velázquez Del Rosario Alberto, Bogale ... and concentrations of alkaline ...
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A review on extractive metallurgy of tantalum and niobium
Ore concentration (BRGM, 2012) Wodgina mines: Global Advanced Metals: Australia: Pegmatite: 28: 0.042: Ore concentration ... Mangano-tantalite ore: Alkaline fusion with KOH followed by water leaching: 5:1: 75.8: 94.7 (Berhe et al., 2018) Nb-Ta low grade concentrates: Alkaline leaching using NaOH: 400 g/L NaOH: 65: 65
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(PDF) REVIEW ON TANTALUM EXTRACTION BY DIFFERENT …
Our analyses further show that Ta 2 O 5 in the ores ranged from a minimum concentration of about 8% in Otu to about 60% in the Egbe deposits, while the Nb 2 O 5 concentrations in the ores ranged from about 20% to 37.5% with the highest coming from the Ofiki deposit. ... 1. Baba, A.A, Adeko a, F.A, and Faseki, M (2005), "A Study of The ...
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Physical beneficiation of heavy minerals
Thus, there is need for proper characterization and concentration/upgrade prior to the downstream extraction measures of essential HMs, (such as columbite, tantalite and cassiterite minerals) in order to reduce cost, energy and reagent consumption, environmental issues, complicated/complex beneficiation methods, as well as to increase the ...
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Preconcentration of Low-Grade Ta–Nb Deposit Using …
Ore from the Jinzhulong Ta–Nb deposit was processed using a combination of gravity concentration and magnetic separation to upgrade the columbite–tantalite fines. Two flowsheets, namely for gravity concentration–magnetic separation (the conventional flowsheet) and magnetic separation–gravity concentration (the novel flowsheet), are proposed herein, …
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A review of tantalum resources and its production
The MIBK pulp extraction method [126,127] reduces the concentration of hydrofluoric acid used from 6 to 1.6 mol/L. However, running the process with low hydrofluoric acid concentration may cause emulsification of the extractant. YANG et al [128] used ultrasound to eliminate emulsification and achieved a recovery of 96.21% of tantalum.
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Preconcentration of Low-Grade Ta–Nb Deposit Using …
The specific objective of this research is to develop an efficient recovery process using gravity concen-tration or magnetic separation as a physical pre-concentration method for the …
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Tantalite Ore Concentration Machine
Our Tantalite Ore Concentration Machine offers exceptional quality within the Mineral Separator category.Collaborating with a manufacturer for customized mineral separators allows you to tailor the equipment to your specific processing requirements. Custom solutions ensure optimal performance and efficiency, meeting your unique industrial needs.
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Alternative beneficiation of tantalite and removal of …
The findings of this study suggest that the beneficiation and alkaline washing of Kenticha pegmatite–spodumene ores produce a high-grade export-quality tantalite concentrate with …
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Hydrometallurgical removal of uranium and thorium from …
In this study, the decomposition behavior of Ta and Nb from the mangano-tantalite ore was investigated using HF/H2SO4 mixture and KOH fusion. The effects of reaction time, decomposition temperature, acid and alkaline concentrations, and particle size on the dissolution process were examined.
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