Commenced in January 2007
Frequency: Monthly
Edition: International
Paper Count: 30172
Study on Extraction of Niobium Oxide from Columbite–Tantalite Concentrate

Authors: Htet Htike Htwe, Kay Thi Lwin

Abstract:

The principal objective of this study is to be able to extract niobium oxide from columbite-tantalite concentrate of Thayet Kon Area in Nay Phi Taw. It is recovered from columbite-tantalite concentrate which contains 19.29 % Nb2O5.The recovery of niobium oxide from columbite-tantalite concentrate can be divided into three main sections, namely, digestion of the concentrate, recovery from the leached solution and precipitation and calcinations. The concentrate was digested with hydrofluoric acid and sulfuric acid. Of the various parameters that effect acidity and time were studied. In the recovery section solvent extraction process using methyl isobutyl ketone was investigated. Ammonium hydroxide was used as a precipitating agent and the precipitate was later calcined. The percentage of niobium oxide is 74%.

Keywords: Calcination, Digestion, Precipitation, SolventExtraction.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1077717

Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 3071

References:


[1] Dennis, W.H. 1961. Metallurgy of the Non-Ferrous Metals. London, U.K: Sir
[2] Miller, G.L. 1957. Metallurgy of the Rarer Metals-6: Tantalum and Niobium. Isaac Pitman & Sons LTD
[3] May, S.L, Tews, J.L, and Goff, T.N. Separation of Tantalum from Columbium by the Hydrofluoric Acid-Sulphuric Acid - Methyl Isobutyl Ketone System. U.S: Bureau of Mines.
[4] B.W. and E.M .Sherwood.1958. Technology of Columbium (Niobium)
[5] Barton, R. William. Columbium and Tantalum: A Material Survey. Information Circular 8120.U.S: Bureau of Mine
[6] John Wiley & Sons, INC. 1957. Solvent Extraction in Analytical Chemistry
[7] Takizawa. 1984. Tantalum and Niobium. Japan: JI CA