A new technology for processing niobite ore found in …
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. The separation process includes two-stage grinding, gravity concentration, magnetic separation, and flotation.
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Mineral Processing of Rare Earth Ores | SpringerLink
The ore is first subjected to size reduction to finer size and then mixed with coke or coal for the preparation of briquettes. At 750–800 °C, the present volatile chlorides such as chlorides of niobium, tantalum, and titanium get distilled, and the chlorides of cerium, rare earths, and thorium remain as residue.
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EXTRACTION AND SEPARATION OF TANTALUM AND …
The extraction of tantalum increased from 93.1% to 99.6% with increasing H2SO4 concentration in the range of 2.0 to 5.0 M and from 55.2 % to 89.1% with increasing H2SO4 concentration in the range of 2.0 to 9.0 M H2SO4 for niobium with 1-octanol, (Figure 4.7). From 92.8% to 99.8% for tantalum with increasing H2SO4 concentration in the range of …
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Extractive metallurgy of columbite-tantalite ore: A detailed …
Commercial and innovative pyrometallurgical (direct reduction), hydrometallurgical (pure leaching) and pyro-hydrometallurgical (NH4HF2 or alkali fusion followed by leaching) …
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Physical beneficiation of heavy minerals
However, columbite and tantalite minerals usually occurs together as columbite-tantalite (coltan) mineral ore in semi singular mineral species and at a combined state of Nb and Ta oxides in varying percentage compositions in the presence of mineral impurities in the ore [7, 18]. This is attributed to the similarities in the physicochemical ...
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Separation of niobium and tantalum from Mozambican tantalite …
Highlights Tantalite ore was digested using molten ammonium bifluoride. Niobium and tantalum were extracted using octanol as extractant. Addition of H 2 SO 4 improves the separation of niobium and tantalum. Extraction with 2-octanol is almost similar to extraction with 1-octanol. Two and three stages were sufficient for the …
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Primary beneficiation of tantalite using magnetic …
The production of pure tantalum and niobium metals from mineral ore entails the removal of associated impuri-ties and the subsequent separation of these metals from each …
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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 …
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Factors and challenges in the recovery of niobium and tantalum …
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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A Process Mineralogy Approach to Gravity Concentration of Tantalum
Tantalum has an average crustal abundance of 1.7 ppm [] making it the 52nd most abundant element in the crust [].Its unique chemical and physical properties including superconductivity, corrosion-resistance, a very high melting temperature (2996 °C), shape memory properties, a high coefficient of capacitance and bio-compatibility …
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Tantalum Processing | TIC
The extraction and refining of tantalum, including the separation from niobium in these various tantalum-containing mineral concentrates, is generally accomplished by treating …
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Tantalite: The mineral columbite-tantalite information and …
Tantalite is the tantalum-rich member, and Columbite is the niobium-rich member. Tantalite is named after its tantalum content, and, together with Columbite, are the most important minerals containing the rare element tantalum. The name Tantalite has been discredited by the IMA, with the more specific designations of Tantalite- (Fe) (also …
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Recovery of niobium and tantalum by solvent extraction from Sn–Ta–Nb
Liquid–liquid extraction. After leaching, the metals of interest need to be separated from the rest of the metals present in the leachate. Liquid–liquid extraction is the most effective way of separating tantalum and niobium, both metals are extracted and separated from acidic leach liquors by using organic extractants such as methyl iso-butyl ketone (MIBK), tri …
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Selective recovery of niobium and tantalum from low
but also, tantalum, uranium and the REE from the Mabounié ore deposit located in Gabon. The Mabounié mine is a secondary Nb– Ta–REE–U deposit associated with carbonatite complexes [22] and contains pyrochlore minerals. The average composition of the ore is as follow (in % w/w): Fe 35%, Al 6.1%, P 2.7%, REE 1.4%,
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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 …
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Recovery of niobium and tantalum by solvent extraction …
Liquid–liquid extraction is the most effective way of separating tantalum and niobium, both metals are extracted and separated from acidic leach liquors by using organic extractants such as methyl iso-butyl ketone (MIBK), tri-butyl phosphate (TBP), cyclohexanone and 2-octanol. 13 Alternative extractants have been also investigated, …
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Green extraction of Niobium and Tantalum from Kenticha Tantalite ore
The decomposition of the Ethiopian Kenticha tantalite ore was studied using the KOH fusion and H2O leaching system at 400 0C for a 1 h reaction time. ... capacity for separating organic compounds ...
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Hydrometallurgical Separation of Niobium and Tantalum: A …
A mixture of pure Ta2O5 and Nb2O5 was dissolved using two different fluxes, namely NH4F·HF and Na2HPO4/NaH2PO4·H2O. Selective precipitation and ion exchange were used as separation techniques. Selective precipitation using p-phenylediamine in a fluoride matrix resulted in the isolation of 73(3)% tantalum …
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Primary beneficiation of tantalite using magnetic separation …
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 …
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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 …
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Influence of Silicate Substance on Pyrochlore and Tantalite …
For tantalum and niobium there is no possibility of extraction by the separating fluid because of the high affinity of Nb and Ta to melts. Therefore, the question of concentration and re-deposition of the scattered ore substance of tantalum-niobates at the hydrothermal stage of evolution is acute. It is known ...
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A mixed collector system for columbite-tantalite flotation
The froth flotation of columbite-tantalite using specific collectors has received increased attention for the recovery of these losses in the fine-size to enhance Ta/Nb recovery. Froth flotation, as a physico-chemical separation process, is effectively employed for separating fine valuable minerals from gangue minerals.
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Processing of Tantalum and Niobium Ores Introduction
the past, Canada was also a substantial tantalum producer (TANCO's Bemic Lake Mine). Ore grades mined are low-ranging from a few ppm to 1500 ppm Ta 2 0 5, depending on the type of deposit and the co- and by-product relations. Since 1980 when tantalum prices reached an all-time high of US$ 126 per lb Ta
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Niobium and tantalum recovery from the primary source
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 ...
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Mapping the material flows and recycling potential of tantalum …
To promote tantalum recycling, it calls for establishing the source-separating system and "reserve bank" of post-use tantalum, as well as an innovative product design for better recycling tantalum resource. ... but was heavily relied on import tantalum ore from other countries. Regarding the tantalum refining industry, in 2014, …
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Chlorination of niobium and tantalum ore
The reaction of chlorine with columbite concentrate, a niobium and tantalum ore, was studied by thermogravimetry between 300° and 950°C. Nonisothermal and isothermal measurements were performed. Morphological evolution of solid reactants and elemental composition of particles were analyzed by SEM and EDXS, respectively.The …
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A Review of Niobium-Tantalum Separation in Hydrometallurgy
A handful of metals are recovered from primary HM resources, ore deposits as well as upgraded mineral concentrates. For instance, the penta-oxide compounds of Nb and Ta metallic elements (Nb 2 O 5 ...
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A review on extractive metallurgy of tantalum and niobium
High-grade tantalum wastes can be processed and recycled in the chemical/metallurgical process (Aits, 1989) along with ore concentrates and high-grade slags from tin production (Albrecht et al ...
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Extractive metallurgy of columbite-tantalite ore: A …
Leaching of columbite-tantalite ore to convert Ta and Nb oxides into intermediate compounds is a twofold process, which includes purification (solvent extraction) and separation from impurities like Fe, Sn, Ti, and Mn (Shikika et al. 2020).
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Preconcentration of Low-Grade Ta–Nb Deposit Using …
Magnetic separation is employed in this flowsheet as a preconcentration method to reject nonmagnetic gangue mineral particles while preconcentrating the paramagnetic …
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