Abstract
A range of potentials in which the cobalt-tungsten alloy phase is selectively dissolved in the solutions of phosphoric acid to form soluble compounds of these metals while the tungsten carbide phase remains in the precipitate is determined. It is shown that tungsten ores and concentrates are decomposed at temperatures of 1050 to 1100°C in sodium chloride-sodium metasilicate melts to form two immiscible phases: halide-tungstate, which contains 96 to 99%, and silicate, which contains 90% of the ore components.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Kieffer, R. and Benesovsky, F., Hartmetalle, Wien: Springer, 1965.
Shapoval, V.I. and Zhabenko, V.A., Sovremennoe sostoyanie i perspektivy razvitiya tsvetnoi metallurgii na predpriyatiyakh Ukrainskoi SSR (Nonferrous Metallurgy State of the Art and Prospects for the Plants of Ukrainian SSR), Kiev: Naukova dumka, 1989, p. 88.
Kozin, L.F. and Trefilov, V.I., Redkometall’naya promyshlennost’ Ukrainy. Problemy i perspektivy (Ukrainian Industry of Rare Metals: Problems and Prospects), Preprint of Inst. of Materials Science, Inst. of General and Inorganic Chemistry, Nat. Acad. Sci. of Ukraine, Kiev, 1997.
Pivovarov, M.N. and Vlasova, A.V., New Recycling Method for Waste Hard Alloy Lumps, Novaya Tekhnol., 2003, no. 1, p. 89.
Svoistva, poluchenie i primenenie tugoplavkikh soedinenii. Spravochnik (Properties, Production, and Application of Refractory Compounds), Kosolapova, T. Ya., Ed., Moscow: Metallurgiya, 1986.
Shapoval, V.I., Malyshev, V.V., and Sushinskii, N.M., Extraction of Diamonds and Tungdten from Waste Cutting and Drilling Tools, Ekotekhnol. Resurso-sberezh., 1999, no. 6, p. 46.
Malyshev, V.V., Gab, A.I., Shevchenko, V.M., and Glushakov, V.G., Ecological and Resource-Saving Extraction of Tungsten from Wolframite Concentrates in Salt Melts, Ekotekhnol. Resurso-sberezh., 2002, no. 3, p. 73.
Vas’ko, A.T., Elektrokhimiya molibdena i vol’frama (Electrochemistry of Molybdenum and Tungsten), Kiev: Naukova dumka, 1977.
Vas’ko, A.T. and Kovach, S.K., Elektrokhimiya Tugoplavkikh Metallov (Electrochemistry of Refractory Metals), Kiev: Tekhnika, 1983.
Baibatyrov, E.N., Palanker, V.Sh., and Sokol’skii, D.V., Electrochemical Evolvement of Hydrogen on Tungsten Carbide, Elektrokhim., 1974, vol. 10, no. 1, p. 162.
Dasoyan, M.Ya., Pal’mskaya, I.Ya., and Sakharova, E.V., Tekhnologiya elektrokhimicheskikh pokrytii (Technology of Electrochemical Coatings), Leningrad: Mashinostroenie, 1989.
Hansen, M. and Anderko, K., Constitution of Binary Alloys, New York: McGraw-Hill, 1957.
Gomes, J.M., New Method of Tungsten Carbide Manufacturing, International Journal of Refractory and Hard Metals, 1985, vol. 4, no. 4, p. 177.
Makhosoev, M.V., Alekseev, F.P., and Lutsyk, V.I., Diagrammy sostoyaniya molibdatnykh i vol’framatnykh sistem (State Diagrams of Molybdenum and Tungsten Systems), Novosibirsk: Nauka, 1978.
Khimicheskaya entsiklopediya (Chemical Encyclopedia), Knunyants, I.L., Ed., Moscow: Sovetskaya entsiklopediya, 1988.
Gomes, J.M., Kind, L.A., and Spiak, W.A., Electrolytic Preparation of Tungsten Metal and Tungsten Carbide. US Bureau of Mines Rep. Invest. 7344, New York: Plenum, 1970.
Author information
Authors and Affiliations
Corresponding author
Additional information
Original Russian Text © V.V. Malyshev, A.I. Gab, 2007, published in Teoreticheskie Osnovy Khimicheskoi Tekhnologii, 2007, Vol. 41, No. 4, pp. 392–397.
Rights and permissions
About this article
Cite this article
Malyshev, V.V., Gab, A.I. Resource-saving methods for recycling waste tungsten carbide-cobalt cermets and extraction of tungsten from tungsten concentrates. Theor Found Chem Eng 41, 436–441 (2007). https://doi.org/10.1134/S0040579507040161
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1134/S0040579507040161