The present invention has as a principal object the provision of methods by which the naturally occurring oxides of niobium and tantalum are directly and positively separated by a reduction process involving only a single thermal step in which the majority of the niobium values are directly separated from most of the tantalum values.
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Separation of niobium and tantalum in liquid extraction Ernest Lee Koerner Jr. Iowa State College ... hio methods en^loyed. Preliminary cost estimates veve made for production of purified niohiun and tantalum oxides from an ore concentrate assaying 63 paz* cent
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Basic methods for preparing tantalum materials Firmetal, 09:20:00 PM. The main process of tantalum smelting is to decompose concentrate, purify and separate tantalum and niobium to make the pure compounds of tantalum and niobium, and finally make the metal. Hydrofluoric acid decomposition, sodium hydroxide melting and chlorination can be used to decompose the ore.
tantalum in the minerals ores. Fourteen samples (14) were analyzed at the laboratory and the results showed that the concentration of tantalum pentoxide (Ta 2 O 5) ranged from % to %. Keywords: Energy Dispersive Xray Fluorescence (EDXRF), tantalum, minerals ore
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What is Coltan? 5 Facts You Should Know. ... What is coltan? It's where tantalum and niobium come from. Coltan, or columbitetantalite, is an ore from which niobium and tantalum are extracted.
detection for the spectrographic methods employed. v Preliminary cost estimates were made for production of purified niobium and tantalum oxides from an ore concentrate assaying 63 per cent niobium oxide and 7 per cent oxide. The basis chosen was a plant producing 300,000 pounqs
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2. Materials and methods Tantalum in Europe occurs mainly in leoucogranites located the west part of the continent. The materials used in the present project are the rareelement enriched granites of St Austell, Cornwall and the Penouta leucogranites, located in Galicia, Spain. In addition, a tantalum rich ore was used to facilitate the study.