ELECTRO-CHEMICAL PRODUCTION OF TUNGSTEN OXIDE FROM PSEUDO-ALLOY CARBIDE TYPE WC-Co

  • G.G. Tulsky National Technical University «Kharkov Polytechnic Institute», Kharkiv
  • L.V. Lyashok National Technical University «Kharkov Polytechnic Institute», Kharkiv
  • M.P. Osmanova National Technical University «Kharkov Polytechnic Institute», Kharkiv
  • A.E. Soboleva National Technical University «Kharkov Polytechnic Institute», Kharkiv
Keywords: tungsten oxide, WC-Co alloy, nitric acid, anode dissolution, oxidation

Abstract

Widespread use of specialized tools, the component part of which is tungsten, leads to the accumulation of its secondary raw materials (worked tools, cutters, drills, etc.). That is why there is a need to create technologies for recycling of the demanded metals, in particular tungsten. The purpose of this work is to study the anode behavior of carbide pseudoalloy type WC-Co in solutions of nitric acid with the addition of fluoride acid to obtain, as a target product, higher tungsten oxide in one stage. The corrosion behavior of carbide type pseudoalloy in acid solutions has been studied, and it has been found that the highest oxidation rate occurs in a concentrated solution of nitric acid. In order to accelerate the process and to increase the yield on the substance, adding to the fluoride acid working electrolyte has been proposed. As a result of the researches, it has been found that the behavior of the dissolution of pseudoalloys of the carbide type is characterized by the properties of the main component — tungsten. An electrolyte for obtaining higher tungsten oxide in one stage has been proposed. Bibl. 10, Fig. 1, Tab. 1.

Author Biographies

G.G. Tulsky, National Technical University «Kharkov Polytechnic Institute», Kharkiv

Doctor of Technical Sciences, Professor

L.V. Lyashok, National Technical University «Kharkov Polytechnic Institute», Kharkiv

Candidate of Technical Sciences, Professor

M.P. Osmanova, National Technical University «Kharkov Polytechnic Institute», Kharkiv

PhD Student

References

Bajrachnyj B.I., Lyashok L.V. [Rare scattered andnoble elements. In: Technology of production and use]. Xarkiv : Nacional`nyi texnichnyi universytet «XPI», 2007. 303 p. (Ukr.)

Weidman M.C., Esposito D.V., Hsu I.J., Chen J.G. Electrochemical stability of tungsten and tungsten monocarbide (WC) over wide pH and potential ranges. Journal of the Electrochemical Society. 2010. No. 157 (12). pp. F179–F188.

Osmanova M.P., Tul’s’kij G.G., Lyashok L.V., Soboleva A.E., Zhuk A.M. [Investigation of oxidation process of carbide tungsten pseudoalloys in aqueous solutions]. ²nformac³jn³ tekhnolog³¿: nauka, tekhn³ka, tekhnolog³ya, osv³ta, zdorov’ya. 2018. Pt 2. P. 278. (Ukr.)

Kolobov G.A., Vodennikov S.A., Pavlov V.V., Kirichenko A.G., Mosejko Yu.V., Pecherica K.A., Karpenko A.V. [Recycling of waste tungsten and molybdenum steels and compound alloys]. Metalurg³ya. 2016. Iss. 1. pp. 19–23. (Rus.)

Lyashok L.V., Gomozov V.P., Osmanova M.P., Zhuk A.N. [Electrochemical synthesis of oxidant for dissolution of WC–Co alloys in hydrochloric acid]. Visnyk Nacional`nogo texnichnogo universy`tetu «XPI». Ser. Ximiya, ximichna texnologiya ta ekologiya. 2018. No. 35. pp. 66–70. (Rus.)

Tomoyuki IshIda, Takeshi Itakura, Hideki Moriguchi, Akihiko Ikegaya. Development of technologies for recycling cemented carbide scrap and reducing tungsten use in cemented carbide tools. SEI Technical revive. 2012. No. 75. pp. 38–45.

Kunty`j O.I., Yavors`ky`j V.T., Ivashkiv V.R.,Kozibroda Ya.I. [Electrochemical transformation of WC–Ni alloy in solutions of H2SO4]. Voprosy himii i himicheskoj tekhnologii. 2005. No. 5. pp. 169–172. (Ukr.)

Parshutin V.V. [Corrosion and electrochemical behavior of pseudoalloys based on tungsten and their components]. Ehlektronnaya obrabotka materialov. 2008. No. 6. pp. 27–45. (Rus.)

Zajchenko V.N., Fomanyuk S.S., Krasnov Yu.S., Kolbasov G.Ya. [Extraction of tungsten and cobalt from solid metal wastes electrochemically]. Zhurnal Hromatograf³chnogo tovaristva. 2013. 13 (1–4). pp. 44–48. (Rus.)

Zajchenko V.N., Fomanyuk S.S., Krasnov Yu.S., Kolbasov G.Ya. [Regeneration of tungsten and cobalt from secondary raw materials]. Energotekhnologii i resursosberezhenie [Energy Technologies and Resource Saving]. 2011. No. 2. pp. 51–54. (Rus.)

Published
2019-06-20
How to Cite
Tulsky, G., Lyashok, L., Osmanova, M., & Soboleva, A. (2019). ELECTRO-CHEMICAL PRODUCTION OF TUNGSTEN OXIDE FROM PSEUDO-ALLOY CARBIDE TYPE WC-Co. Energy Technologies & Resource Saving, (2), 49-53. https://doi.org/10.33070/etars.2.2019.06
Section
Waste treatment and recycling