PRODUCTION OF DISPERSED NICKEL POWDER IN ELECTROCHEMICAL PROCESSING OF A RENIUM-CONTAINING HEAT-RESISTANT ALL

The article is devoted to the substantiation of the proposed technological scheme of electrochemical processing of rhenium-containing heat-resistant alloy ZhS32-VI of composition (mass %): Re - 4.0; Co - 9.3; W - 8.6; Y - 0.005; Lа - 0.005; Al - 6.0; Cr - 5.0; Tа - 4.0; Nb - 1.6; Mо - 1.1; С - 0.16; B - 0.15; Cе - 0.025, Ni - 60.05 to obtain nickel-containing cathode deposits. The results of studying the composition, surface morphology and granulometric analysis of cathodic precipitates obtained during the electrochemical processing of the spent heat-resistant alloy ZhS32-VI with the use of acid electrolytes are presented. Anodic dissolution of ZhS32-VI was performed in the galvanostatic mode. The effect of the electrolyte composition on the process parameters (current yield, distribution of alloy components between the electrolysis products, particle size distribution of the cathode product), electrochemical processing of this alloy were established. It is shown that depending on the nature of the electrolyte, cathode deposits of different chemical and phase composition can be obtained. They differ in the size and morphology of the surface. It has been established that the value of the cathode precipitate grains obtained in acid electrolytes is almost the same: 99% of the cathode precipitate grains are in the range from 0.04 to 0.60 μm. The main difference is a slight increase in the amount of fine fraction when sulphosalicylic acid is added to the electrolyte. All the cathodic deposits obtained have a dendritic structure, the development of which depends on the nature of the electrolyte, the precipitates obtained with the use of a nitrate electrolyte having the most developed structure and the smallest particle size.

high-temperature alloy, electrochemical processing, anode slurry, acid electrolyte, sulfosalicylic acid, nickel-containing concentrate

1. Rao S.R. Resource recovery and recycling from metallurgical wastes. V. 7. Elsevier Science, 2006. 580 p.

2. Lutz L.J., Parker S.A., Stephenson J.B. Recycling of contaminated superalloy scrap via electrochemical processes. TMS Annual Meeting. 1993: 1211-1220.

3. Prasad V.V.S., Rao A.S., Prakash U., Rao V.R., Rao P.K., Gupt M.K. Recycling of super alloy scrap through electro slag remelting. ISIJ Int. 1996; 36(12): 1459-1464. DOI: 10.2355/isijinternational.36.1459

4. Flow studies for recycling metal commodities in the United States. Ed. S.F. Sibley. Reston, Virginia: US Geological Survey, 2004. 182 p.

5. Worrell E., Reuter M.A. Handbook of Recycling: State-of-the-art for Practitioners, Analysts, and Scientists. Amsterdam: Elsevier, 2014. 600 p.

6. Palant A.A, Bryukvin V.A., Levin A.M., Levchuk O.M. Combined electrochemical processing of the wastes of nickel super alloys containing rhenium, tungsten, tantalum, niobium and other precious metals. Metally (Metals). 2014; 1: 25-27. (in Russ.)

7. Palant A.A., Bryukvin V.A., Levchuk O.M., Palant A.V., Levin A.M. Method of electrochemical processing of metal waste of heat-resistant nickel alloys containing rhenium: pat. 2401312 RF. No. 2009113255/02; filled 04/09/2009; publ. 10/10/2010. (in Russ.)

8. Stoller V., Olbrich A., Meese-Marktscheffel J., Mathy W., Erb M., Nietfeld G., Gille G. Process for electrochemical decomposition of superalloys: Pat. 10155791 DE. Publ. 07/17/2003.

9. Krynitz U., Olbrich A., Kummer W., Schloh M. Method for the decomposition and recovery of metallic constituents from super alloys: Pat. 5776329 USA. Publ. 07/07/1998.

10. Stoller V., Olbrich A., Meese-Marktscheffel J., Mathy W., Erb M., Nietfeld G., Gille G. Electrochemical dissolution process for disintegrating super alloy scraps: Pat. 1312686 EР. Publ. 05/21/2003.

11. Srivastava R., Kim M., Lee J., Jha M.-K., Kim B.-S. Resource recycling of superalloys and hydrometallurgical challenges. J. Mater. Sci. 2014; 49(14): 4671-4686.

12. Shipachev V.A. Some technological measures to extract and purify rhenium from heat-resistant materials. Khimiya v interesakh ustojchivogo razvitiya (Chemistry for Sustainable Development). 2012; 20: 365-368. (in Russ.)

13. Palant A.A., Bryukvin V.A., Levchuk O.M. Complex electrochemical processing of metallic rhenium-containingwastes of high-temperature nickel alloy in sulphate electrolytes. Elektrometallurgiya (Electrometallurgy). 2010; 7: 29-33. (in Russ.)

14. Chernyshova O.V., Drobot D.V. Variants of electrochemical processing of rhenium-containing hightemperature alloy. Theoretical Foundations of Chemical Engineering. 2018; 52(4): 711-716.

15. Chernyshova O.V., Chernyshov V.I., Drobot D.V., Makhon'ko M.V. Method of extraction of nickel during electrochemical processing of heat-resistant nickel alloys: pat. 2542182 RF. No. 2013145573/02; filled 10/11/2013; publ. 05/20/2015. (in Russ.)

16. Gajdarenko O.V., Chernyshov V.I., Chernyshov Yu.I. Method for measuring the potential of a working electrode of an electrochemical cell under a current: Pat. 2106620 RF. No. 96108732/25; filled 04/26/1996; publ. 03/10/1998. (in Russ.)

17. Chernyshova O.V., Kanagatov D.G., Drobot D.V. Nickel-cobalt concentrate production under the processing of rhenium-containing high-temperature alloy. Izvestiya VUZov. Tsvetnaya metallurgiya (Nonferrous Metallurgy). 2016; 6: 40-48. (in Russ.)

18. Kobzhanov A.S., Kurbatov A.P., Romanov G.A. Influence of electrolyte composition and temperature on the electrodeposition of copper powders. Promyshlennost' Kazakhstana (Industry of Kazakhstan). 2005; 30(3): 80-81. (in Russ.)

19. Isaev A.V., Sedakov A.Yu. Investigation of the mechanism of cathodic nickel reduction in sulfamate electrolyte. Novye promyshlennye tekhnologii (New Industrial Technologies). 2009; 5: 12-15. (in Russ.).

20. Vagramyan A.T., Zhamargortsyants M.A. Electrodeposition of metals and inhibiting adsorption. Moscow: Nauka Publ., 1969. 199 p.(in Russ.)

21. Vinogradov S.N., Sevast'yanov N.V. Sulfosalicylate electrolyte for deposition of coppernickel alloy: pat. 2365683 RF. No. 2008138832/02; filled 09/30/2008; publ. 08/27/2009. (in Russ.)

22. Baykonurova O.A., Usol'tseva G.A., Akpanbaev R.S., Abushakhman O.Sh. The effect of organic additives on the quality of electrolytic copper powder. Izvestiya nauchno-tekhnicheskogo obshchestva "KAHAK" (Proceedings of the scientific-technical society "QAGHAQ"). 2011; 1 (31): 35-39. (in Russ.).

23. Skibina L.M. Dorogan I.V., Bumber A.A., Burdina E.I. Effect of complexation of cadmium ions with N-methylpyrrolidone on kinetics of their electroreduction in sulfate electrolyte. Ehlektrohimiya (Electrochemistry). 2013; 49(2): 138-145. (in Russ.)

24. Sharifirad M., Omrani A., RostamiА. Electrodeposition and characterization of polypyrrole films on copper. J. Electroanal. Chem. 2010; 645: 149-158.

25. Sedoikin A.A., Tsupak T.E. The role of migration mass transfer in the electrodeposition of nickel from sulfate-chloride and chloride solutions containing succinic acid. Russian Journal of Electrochemistry. 2008; 44(3): 319-326.