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    Tantalite is a dull black metallic ore from which the elements niobium and tantalum are extracted. The niobium-dominant mineral in coltan is columbite (after niobiums original American name, columbium), and the tantalum-dominant mineral is tantalite.Tantalum from coltan is used to manufacture tanta

  • Tantalite - an overview | ScienceDirect Topics

    Ore deposits can be exclusively formed under sedimentation processes such as iron ore formation (banded iron formations [BIF]/banded hematite quartzite [BHQ]), diamond in conglomerate, zinc-lead deposits in dolomite, and limestones. The deposits show bedded, stratabound, and often stratiform features having concordant relation with country rocks.

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    •The iron fraction, after magnetic separation from raw tantalite ore, is still rich in uranium, with 254±8 Bq/kg of 238 U, •but after recycling for improved separation of tantalite, the materials disposed into the final waste pond although containing little tantalum were richer in uranium.

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  • Tantalite | mineral | Britannica.com

    …the rare and important mineral tantalite (the principal ore of tantalum), of which Mozambique has what may be the world’s largest reserves. Gold, bauxite (the principal ore of aluminum), graphite, marble, bentonite, and limestone are mined and quarried, and sea salt is extracted in coastal areas. Other development efforts have…

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    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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    Tantalum Ore a natural mineral formation containing tantalum in compounds and quantities that make its industrial extraction technically feasible and economically expedient. A distinction is made between tantalum ores proper, in which Ta2O5:Nb2O5 ≥ 1, and complex tantalum-niobium ores. The main minerals of tantalum ores are columbite-tantalite ...

  • Tantalum - Wikipedia

    Tantalite (Fe, Mn)Ta 2 O 6 is the most important mineral for tantalum extraction. Tantalite has the same mineral structure as columbite (Fe, Mn) (Ta, Nb) 2 O 6; when there is more tantalum than niobium it is called tantalite and when there is more niobium than tantalum is it called columbite (or niobite).

  • EXTRACTION AND SEPARATION OF TANTALUM AND …

    tantalite using ammonium bifluoride as an alternative to hydrofluoric acid. The extraction of niobium and tantalum from tantalite can be divided into three activities, viz., acid treatment of the ore to bring the niobium and tantalum values into solution, separation of

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  • tantalite ore raw - arctic-geophysics.de

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  • How Tantalum Is Mined | Sciencing

    Apr 24, 2017· How Tantalum is Mined. Tantalum comes from the processing and refining of tantalite. Tantalite is the common name for any mineral ore containing tantalum. Most tantalum mines are open pit; some are underground. The process of mining tantalum involves blasting, crushing and transporting the resulting ore to begin the process of freeing the ...