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    Niobium Ores natural mineral formations containing niobium in quantities that make economically feasible the extraction of niobium and its compounds. Niobium ores contain a certain quantity of tantalum. A distinction is made between niobium ores, in which the Nb2O5: Ta2O5 ratio is greater than 20:1, and tantaloniobium ores, where the ratio is 3 ...

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    ­ 23 ­ Flotation of Tantalum/Niobium Ores. INTRODUCTION. There are approximately 130 different minerals that contain tantalum and niobium, from which about 80 are Ta/Nb only.

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    Handbook of Flotation Reagents: Chemistry, Theory and Practice: Flotation of Gold, PGM and Oxide Minerals, Volume 2 focuses on the theory, practice, and chemistry of flotation of gold, platinum group minerals (PGMs), and the major oxide minerals, along with rare earths.

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    Flotation of Tantalum/Niobium Ores Handbook of … The Ghurayyah ore has a complex mineral composition, and is a relatively finegrained ore. The niobium present in the ore is represented by a variety of minerals, including pyrochlore, yttropyrochlore and columbite. The tantalum in the ore was associated with niobium and had a high Nb:Ta ratio. Niobium Wikipedia. The German chemist ...

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