Technical Features and Research Progress of Separating Impurities in Producing Tantalum (Niobium) Oxide by Traditional Technology
International Journal of Mineral Processing and Extractive Metallurgy
Volume 3, Issue 2, June 2018, Pages: 29-36
Received: Jun. 21, 2018;
Accepted: Jul. 7, 2018;
Published: Aug. 14, 2018
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Huijuan Yan, Jiujiang Nonferrous Metallurgy Company Limited, Jiujiang, China
Desheng Tang, Jiangxi Tungsten Industry Group Company Limited, Nanchang, China
In order to meet the demand for high purity tantalum and niobium products and to adapt to the complexity of tantalum niobium ore and waste in smelting, it was necessary to prepare high pure tantalum (niobium) oxide by traditional technology. In this paper, the process features, principles and functions of the decomposition, extraction, neutralization, washing and calcination in the traditional technology were described in detail, and the key factors which affect the separation of impurities in each process and the influences of various factors on the process and product quality were analyzed. Extraction was the key process to remove metal impurities in products. The main factors affecting the extraction separation are acidity, grade efficiency, temperature, extractant, concentration of tantalum/niobium, mass ratio of tantalum to niobium and volume ratio. In the process of precipitation and calcination the reagent purity, the equipment material, and the environmental cleanliness must be concerned to avoid the inclusion of impurity elements. The research and progress of impurity removal technology in tantalum (niobium) oxide production process were reviewed. The innovation of the traditional technology can meet special low requirement of one or several elements in the product, such as fluorine, tungsten, antimony, etc. For the future the basic research on the existence state and transformation behavior of tantalum and niobium and other elements in each process of traditional technology should be strengthened.
Technical Features and Research Progress of Separating Impurities in Producing Tantalum (Niobium) Oxide by Traditional Technology, International Journal of Mineral Processing and Extractive Metallurgy.
Vol. 3, No. 2,
2018, pp. 29-36.
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