A review on extractive metallurgy of tantalum and …
Tantalite ore: HNO 3: 8.06 M: 81.3% of columbite leached (Baba et al., 2007) Tin slag containing 14.1% Nb 2 O 5: NaOH/HCl: Conc. NaOH: Up-graded concentrate …
Niobium-Tantalum Ore Beneficiation
The chemical formula of niobium-iron ore-tantalite is AB2O6, both of which are referred to as niobium-tantalum. Where A in the formula stands for iron and manganese, and B stands for niobium and tantalum. The magnetization rate of niobium-iron ore-tantalite is (22.1 to 37.2) × 10-6. The dielectric coefficient of niobium-iron ore is 10 to 12 ...
Comparative study of tantalite dissolution using different …
Lithium tetraborate (non-oxidizing acidic flux) is successful in digesting different tantalite ore samples [5]. The dissolution, however, requires that H 2 SO 4 and methanol are added simultaneously after the fusion process to prevent the formation of an insoluble boric acid in the reaction mixture.
Beneficiation and Separation of Egyptian Tantalite Ore
coul d be separated from tantalite ore by acid leaching at 200°C [ 8]. Solvent extraction technique is widely used in the separation of tantalum and niobium minerals from their ores. The use of ...
Factors and challenges in the recovery of niobium and …
The applications and utilization of Nb and Ta materials by industries is greatly dependent on the purity-impurity level of the final products [3].In essence, the production of high purity Nb/Ta metals from mineral resources as well as the choice or application variation depends on the mineral type (ore or concentrate), nature, quality and …
(PDF) Title: Decomposition of the Kenticha mangano-tantalite ore …
compared with that of the tantalite ore (with 55.71 wt% Ta 2 O 5) confirmed the very low wt% of Ta 2 O 5 in the acid leached residue. Th e 721 cm -1 stretching frequency corresponds to Ta-O bond ...
A study of the kinetics of the dissolution of a Nigerian Tantalite ore …
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 ...
Research and Progress of Tantalum-niobium Ore …
The acid is adsorbed on the surface of ferroniobium rutile, and the adsorption form is mainly chemical adsorption. 4. Hydroxamic acid collectors. A tantalum-niobium fine mud ore in a certain place in my …
Investigation of Dissolution Kinetics of A Nigerian Tantalite Ore …
A study of the kinetics of the dissolution of a Nigerian tantalite ore in Nitric acid has been examined. A detailed investigation on the quantitative leaching of the mineral was also carried out. The effects of some parameters such as acid concentration, contact time, temperature, particle size and the stirring rate on dissolution action have been …
A study of the kinetics of the dissolution of a Nigerian tantalite ore …
A study of the kinetics of the dissolution of a Nigerian tantalite ore in hydrochloric acid AA Baba. FA Adekola. M Faseki. Abstract. No Abstract. Ife Journal of Science Vol. 7(2) 2005: 221-227 × Donate. AJOL is a Non Profit Organisation that cannot function without donations. ...
Primary beneficiation of tantalite using magnetic separation and acid
Primary beneficiation was successfully performed prior to dissolution of manganotantalite (sample A) and ferrotantalite (sample C) samples obtained from two different mines in the Naquissupa area, Mozambique. Magnetic separation removed the majority of iron and titanium, whereas H2SO4 leaching removed a large portion of …
A review on extractive metallurgy of tantalum and niobium
Ore pre-treatment. The choice of an appropriate pre-treatment step is often considered as a key factor to establish an economically viable process for extraction. The pre-treatment of colombo-tantalite ores involves common size reduction operations such as crushing and grinding coupled with size classification.
(PDF) Investigation of dissolution Kinetics of a …
ABSTRACT A study of the kinetics of the dissolution of a Nigerian tantalite ore in Nitric acid has been examined. A detailed investigation on the quantitative leaching of the mineral was also carried out. The effects of …
Primary beneficiation of tantalite using magnetic separation and acid
When finely ground ore (−74 μm) was reacted upon for 2 h with a mixture of sulfuric acid (10.8 M) and nitric acid (5.3 M) in the ore to acid weight ratio of 1:3 at 200 °C, almost complete ...
Hydrometallurgical removal of uranium and thorium from …
This study focused on the leaching of uranium and thorium from a high grade Ethiopian tantalite ore using sulfuric acid. The effects of variables such as acid concentration, temperature and leaching time were studied. In general, the leaching efficiency of uranium increases with increasing temperature from 100 to 300 °C whereas …
Primary beneficiation of tantalite using magnetic …
1. Introduction. The production of pure tantalum and niobium metals from mineral ore entails the removal of associated impuri-ties and the subsequent separation of these …
A study the kinetics of the dissolution of a Nigerian tantalite ore …
The effects of temperature, acid concentration, stirring rate and particle size on the dissolution rate have been Abstract Experiments on the kinetics of dissolution of a Nigerian tantalite ore in hydrochloric acid medium have been undertaken.
Tantalum | Rare Earth Element, Uses in Electronics & Alloys
tantalum (Ta), chemical element, bright, very hard, silver-gray metal of Group 5 (Vb) of the periodic table, characterized by its high density, extremely high melting point, and excellent resistance to all acids except hydrofluoric at ordinary temperatures. Closely associated with niobium in ores and in properties, tantalum was discovered (1802 ...
Processing of Columbite Tantalite Ore by utilization of …
In this process dissolution of columbite-tantalite ore is carried out using concentrated hydrofluoric acid. The solvent extraction process is in 4N HF and 7N H2SO4 media using air lift mechanism.
Hydrometallurgical assessment of oxides of Nb, Ta, Th and U …
Based on previous works; and quantitative analysis of an tantalite ore is blessed in high elemental compositions of Ta, and Nb, the Kenticha-Ethiopia ore revealed that the composition of Kenticha deposit varied significantly, and the activity of some concentrations of radionuclides is the main source of the radiation dose [4, 8, 12, 14, …
A review of tantalum resources and its production
The phosphonic acid functionalised ionic liquids (TSILs) provide efficient extraction of tantalumâˆ'niobium with HF concentrations of 1 mol/L [130]. …
Extraction of niobium and tantalum from ferrocolumbite
Pressure acid leaching was used to extract niobium and tantalum from a ferrocolumbite ore. The leaching was carried out in a pressure reactor using hydrofluoric acid as leachant. Various parameters, such as temperature, reaction time, HF concentration, stirring speed, particle size and solid-to-liquid ratio in the leaching …
Hydrometallurgical assessment of oxides of Nb, Ta, …
According to a prior study, 6 M HF and 1 M H 2 SO 4 was chosen as the ideal acid concentration ratio to leach Nb and Ta from tantalite ore [ 12 ]. In a batch reactor, …
Niobium and tantalum beneficiation from tantalite ore
The final step in this study was to investigate the possible beneficiation of the tantalite ore by combining the acid leaching with the magnetic removal and microwave dissolution of the mineral. The mineral sample which was investigated possessed minute magnetic properties and small amounts of Ta and Nb (1.79 and 1.69 % respectively) together ...
Tantalite: The mineral columbite-tantalite information and …
The Mineral tantalite. Tantalite forms a solid solution series with Columbite known as the Columbite-Tantalite series. Tantalite is the tantalum-rich member, and Columbite is the …
Investigation of Dissolution Kinetics of A Nigerian …
About 81.3% of tantalite ore was dissolved within 120min., using 8.06M HNO 3 solution with <0.040mm particle size. Activation energy, Ea, of 22.37kJ/mole was obtained for the process.
A study the kinetics of the dissolution of a Nigerian tantalite ore …
A value of27.95 kJ/mole was obtained for the activation energy of dissolution ofthe mineral, which is reasonable for a rate limiting diffusion mechanism. Keywords: Nigeria, Tantalite ore, Hydrochloric acid, Dissolution. l.Introduction Tantalite ore is an economic mineral which contains majorly tantalum and niobium.
Hydrometallurgical assessment of oxides of Nb, Ta, Th and U …
Tantalite ore is the main source of the metals niobium (Nb) and tantalum (Ta). Today, the needs for these economic and irreplaceable Nb, and Ta metals are becoming imperative for the technological world, to meet the demand, a lot of research is needed to ore reserves, extraction methodology and simplified refining processes should be in plethora. This …
Niobium-tantalum Beneficiation: How to Separate Niobium-tantalum Ore
This process is characterized by high sorting efficiency for fine-grained tantalite and niobium ore, but all tantalum and niobium minerals in the ore must have weak magnetic properties. ... (5%) to obtain artificial tantalum-niobium concentrate. The filtrate is a sodium tungstate solution. After acid adjustment (pH2-2.5), extraction ...
An investigation of niobite flotation with octyl diphosphonic acid …
The collectors used in this study included octyl diphosphonic acid (ODA), benzyl arsenic acid (BAA), ... 4 HF 2 or alkali fusion followed by leaching) technologies for the purification and separation of Ta and Nb from columbite-tantalite ore are reviewed in this paper. The selective recovery of Ta and Nb from the leachates using various ...
