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

Open access


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.

[1] S. Hong, J. Song, S. Lee, H. Hong, H. Kang, J. Korean Powder 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] A.A. Alhazza, Hydrometallurgy 27, 705 (2009).

[7] T.M. Lathaa, S. Venkatachalama, Hydrometallurgy 22, 353 (1989).

[8] S. Hairummisha, G.K. Sendil, J.P. Rethinaraj, G.N. Srinivasan, P. Adaikkalam, S. Kulandaisamy, Hydrometallurgy 85, 67 (2009).

[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).

[13] P.P. Sheng, T.H. Etsell, Waste Manage Res. 24, 380 (2007).

[14] A.M. Klimova, V.A. Ananichev, A. Mohammad, L.N. Blinov, Glass Physics & Chemistry, 31, 760 (2005).

Archives of Metallurgy and Materials

The Journal of Institute of Metallurgy and Materials Science and Commitee on Metallurgy of Polish Academy of Sciences

Journal Information

IMPACT FACTOR 2016: 0.571
5-year IMPACT FACTOR: 0.776

CiteScore 2016: 0.85

SCImago Journal Rank (SJR) 2016: 0.347
Source Normalized Impact per Paper (SNIP) 2016: 0.740


All Time Past Year Past 30 Days
Abstract Views 0 0 0
Full Text Views 49 49 17
PDF Downloads 9 9 4