Extraction Factor Of Pure Ammonium Paratungstate From Tungsten Scraps

• Autorzy: Pee J-H. , Kim G. H. , Lee H. Y. , Kim Y. J.

Identyfikatory

DOI

10.1515/amm-2015-0141

Warianty tytułu

PL

Współczynnik ekstrakcji czystego parawolframianu amonu z odpadów wolframowych

• Języki publikacji: EN

Abstrakty

EN

Typical oxidation process of tungsten scraps was modified by the rotary kiln with oxygen burner to increase the oxidation rate of tungsten scraps. Also to accelerate the solubility of solid oxidized products, the hydrothermal reflux method was adapted. By heating tungsten scraps in rotary kiln with oxygen burner at around 900° for 2hrs, the scraps was oxidized completely. Then oxidized products (WO3 and CoWO4) was fully dissolved in the solution of NaOH by hydrothermal reflux method at 150° for 2hrs. The dissolution rate of oxidized products was increased with increasing the reaction temperature and concentration of NaOH. And then CaWO4 and H2WO4 could be generated from the aqueous sodium tungstate solution. Ammonium paratungstate (APT) also could be produced from tungstic acid using by aqueous ammonium solution. The morphologies (cubic and plate types) of APT was controlled by the stirring process of purified solution of ammonium paratungstate.

Słowa kluczowe

EN

raw material; recycling; ammonium paratungstate; tungsten scraps; extraction

PL

surowce; recykling; parawolfrawian amonu; odpady wolframowe; ekstrakcja

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2015
• Tom: Vol. 60, iss. 2B
• Strony: 1403--1405
• Opis fizyczny: Bibliogr. 12 poz., rys.

Twórcy

autor

Pee J-H.

• Korea Institute of Ceramic Engineering and Technology, Icheon-Si, Korea

autor

Kim G. H.

• Korea Institute of Ceramic Engineering and Technology, Icheon-Si, Korea

autor

Lee H. Y.

• Iljin Diamond, Eumsung-Gun, Korea

autor

Kim Y. J.

• Korea Institute of Ceramic Engineering and Technology, Icheon-Si, Korea

Bibliografia

• [1] S. Hong, J. Song, S. Lee, H. Hong, H. Kang, J. Kor. Powd. Metall. Inst. 19, 79 (2012).
• [2] S. Venkateswaran, W.D. Schubert, B. Lux, M. Ostermann, B. Kieffer, Int. J. Refract. Met. H. 14, 263 (1996).
• [3] J. C. Lin, J. Y. Lin, S. P. Jou, Hydrometallurgy 43, 47 (1996).
• [4] C. Edtmaier, R. Schiesser, C. Meissl, W.D. Schubert, A. Bock, A. Schoen, B. Zeiler, Hydrometallurgy 76, 63 (2005).
• [5] T. Kojima, T. Shimizu, R. Sasai, H. Itoh, J. Mater. Sci. 40, 5167 (2005).
• [6] G. G. Lee, H. S. Kwon, G. H. Ha, J. Kor. Powd. Metall. Inst. 11, 111 (2004).
• [7] F. Lofaj, Y. Kaganovskii, J. Mater. Sci. 30, 1811 (1995).
• [8] B. Casas, X. Ramis, M. Anglada, J.M. Salla, L. Llanes, Int. J. Refract. Met. H. 19, 303 (2001).
• [9] V. B. Voitovich, V. V. Sverdel, R. F. Voitovich, E. I. Golovko, Int. J. Refract. Met. H. 14, 289 (1996).
• [10] E. Lassner, Int. J. Refract. Met. H. 13, 35 (1995).
• [11] J. C. Lee, E. Y. Kim, J. H. Kim, W. B. Kim, B.-S. Kim, B. D. Pandey, Int. J. Refract. Met. H. 29, 365 (2011).
• [12] W. V. John, Int. J. Refract. Met. H. 13, 61 (1995).

Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę.