Extraction Factor Of Tungsten Sources From Tungsten Scraps By Zinc Decomposition Process

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

Identyfikatory

DOI

10.1515/amm-2015-0120

Warianty tytułu

PL

Współczynnik ekstrakcji związków wolframu z odpadów wolframowych w procesie rozkładu cynku

• Języki publikacji: EN

Abstrakty

EN

Decomposition promoting factors and extraction process of tungsten carbide and tungstic acid powders in the zinc decomposition process of tungsten scraps which are composed mostly of tungsten carbide and cobalt were evaluated. Zinc volatility was suppressed by the enclosed graphite crucible and zinc volatilization pressure was produced in the reaction graphite crucible inside an electric furnace for ZDP (Zinc Decomposition Process). Decomposition reaction was done for 2hours at 650°, which 100% decomposed the tungsten scraps that were over 30 mm thick. Decomposed scraps were pulverized under 75μm and were composed of tungsten carbide and cobalt identified by the XRD (X-ray Diffraction). To produce the WC(Tungsten Carbide) powder directly from decomposed scraps, pulverized powders were reacted with hydrochloric acid to remove the cobalt binder. Also to produce the tungstic acid, pulverized powders were reacted with aqua regia to remove the cobalt binder and oxidize the tungsten carbide. Tungsten carbide and tungstic acid powders were identified by XRD and chemical composition analysis.

Słowa kluczowe

EN

raw material; recycling; zinc decomposition process; tungsten carbide; tungstic acid

PL

surowce; recykling; proces rozkładu cynku; węglik wolframu; kwas wolframowy

• 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: 1311--1314
• Opis fizyczny: Bibliogr. 14 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

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• [9] L. Luo, L. Kejun, A. Shibayama, W. Yen, T. Fujita, O. Shindo, A. Katai, Hydrometallurgy 72, 1 (2004).
• [10] M. I. Alkatsev, N. V. Svistunov, I. G. Trotsenko, R. J. of Non-Ferrous Met. 49, 156 (2008).
• [11] J. H. Pee, Y. J. Kim, N. E. Sung, K. T. Hwang, W. S. Cho, K. J. Kim, J. of the Kor. Cer. Soc. 48, 173 (2011).
• [12] 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).
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Uwagi

PL

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