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RARE METALS, SEMICONDUCTORS
ArticleName Electrochemical processing of technogenic wastes of rhenium-containing heat-resistant nickel alloys in sulfuric acid solutions
DOI 10.17580/tsm.2017.10.08
ArticleAuthor Agapova L. Ya., Abisheva Z. S., Kilibaeva S. K., Yakhiyaeva Zh. E.
ArticleAuthorData

JSC “Institute of Metallurgy and Benefication”, Almaty, Kazakhstan:
L. Ya. Agapova, Chief Researcher, e-mail: rm.303.imo@mail.ru
Z. S. Abisheva, Chief Researcher
S. K. Kilibaeva, Senior Researcher
Zh. E. Yakhiyaeva, Leading Engineer

Abstract

We investigated the electrochemical processing of technogenic wastes of rhenium-containing heat-resistant nickel alloys in the form of large scrap pieces of turbine blades in sulfuric acid solutions. By 80–90% of rhenium can be converted into the solution during the anodic dissolution of compact pieces of these alloys in sulfuric acid solutions with nitric acid addition under a direct current of 500–1000 A/m2 with a temperature of 25–30 oC. A high recovery of cobalt, chromium, aluminum and slightly less nickel in solution is also observed under these conditions. Tungsten, tantalum, hafnium and most part of molybdenum pass into the anode slime almost completely. When the anode slime is chemically processed in sulfuric acid solutions with additives of hydrogen peroxide or nitric acid, some part of rhenium, nickel and cobalt in the slime is transferred to the solution. Rhenium (crude ammonium perrhenate, where rhenium content is not less than 68.9 wt. %) is recovered from the combined solution after anodic processing of alloy wastes and chemical dissolution of anode slimes by a known solvent extraction method. The cake, remaining after chemical processing of anode slimes, is a concentrate of refractory rare metals containing up to 39–42% W; 15–18% Ta and 3–4% Hf. A nickel-cobalt concentrate with a content of 31.5% Ni and 4.8% Co is precipitated by sodium hydroxide after rhenium extraction from the sulphate raffinate containing significant amounts of nickel, cobalt, chromium and aluminum. The carried out studies offered a principal technological flowsheet for processing of large pieces of wastes of rheniumcontaining heat-resistant nickel alloys. The flowsheet includes anodic dissolution of wastes with a direct current in sulfuric acid solutions and the production of crude ammonium perrhenate, a concentrate of refractory rare metals and nickel-cobalt concentrate from the products of electrolysis.

Investigations were carried out according to the Grant of the Ministry of Education and Science of the Republic of Kazakhstan No.4351/ГФ4.

keywords technogenic wastes, heat-resistant nickel alloys, electro chemical processing, sulfuric acid solution, anode slime, rhenium, ammonium perrhenate, nickel-cobalt concentrate, concentrate of refractory rare metals.
References

1. Kablov E. N., Petrushin N. V., Svetlov I. L., Demonis I. M. Cast Ni-Base Superalloys for Advanced Aircraft Gas-Turbine Engines. Tekhnologiya legkikh splavov. 2007. No. 2. pp. 6–16.
2. Shtoller V., Olbrikh A., Meeze-Marktsheffel Yu. et al. Method of release of non-ferrous metals from superalloys. Patent RF, No. 2313589. Published: 27.12.2007. Bulletin No. 36.
3. Paretskiy V. M., Besser A. D., Gedgagov E. I. Ways of increasing of rhenium production from ore and technogenic raw materials. Tsvetnye Metally. 2008. No. 10. pp. 17–21.
4. Kasikov A. G., Petrova A. M. Recycling the rhenium from high temperature and special-purpose alloy. Tekhnologiya metallov. 2010. No. 2. pp. 2–12.
5. Petrova A. M., Kasikov A. G., Gromov P. B., Kalinnikov V. T. Rhenium extraction from wastes of complex-alloyed heat-resistant nickel-based alloys. Tsvetnye Metally. 2011. No. 11. pp. 39–43.
6. Petrova A. M., Kasikov A. G. Rhenium extraction out of wastes after the treatment and service of Ni-base superalloys. Aviatsionnye materialy i tekhnologii. 2012. No. 3. pp. 9–13.
7. Gel R. P., Drobotenko G. A., Kolosov V. N., Nekhoroshev N. E. Method of extraction of rhenium oxide from wastes. Patent RF, No. 2061079. Published: 27.05.96. Bulletin No. 5.
8. Palant A. A., Levchuk O. M., Bryukvin V. A. Complex electrochemical technology of processing of wastes of heat-resistant rhenium-bearing nickel alloys. Tsvetnaya metallurgiya. 2007. No. 11. pp. 11, 12.
9. Palant A. A., Bryukvin V. A., Levchuk O. M., Palant A. V., Levin A. M. Method of electrochemical processing of metallic wastes of rhenium-bearing heat-resistant nickel alloys. Patent RF, No. 2401312. Published: 10.10.2010. Bulletin No. 28.
10. Palant A. A., Levchuk O. M., Bryukvin V. A., Levin A. M., Paretskiy V. M. Complex electrochemical processing of metallic rhenium-containing wastesof high-temperature nickel alloy in nitrate electrolytes. Elektro metallurgiya. 2010. No. 7. pp. 29–33.
11. Chernyshova O. V., Drobot D. V. Alternatives of electrochemical processing of rhenium-containing heat-resistant alloy. Khimicheskaya tekhnologiya. 2017. Vol. 18, No. 1. pp. 36–42.
12. Stoller V. et al. Electrochemical dissolution process for disintegrating superalloy scraps. Patent EP1312686. Published: 21.05.2003.
13. Olbrich A., Meese-Marktscheffel J., Jahn M. et al. Recycling of superalloys with the aid of an alkali metal salt bath. Patent WO08/000810 ; filed 29.06.07; published 03.01.08.
14. Krynitz U., Olbrich A., Kummer W., Schlol M. Method for the decomposition and recovery of metallic constituents from superalloys. Patent 5776329 US ; published 07.07.1998.
15. Srivastava R., Kim M., Lee J. et al. Resource recycling of superalloys and hydrometallurgical challenges. Journal of Materials Science. 2014. Vol. 49, No. 14. pp. 4671–4686.
16. Guro V. P. Ammonium perrhenate purification and rhenium recovery from heat-resistant rhenium nickel superalloys. Proceeding of 21st International Conference on Metallurgy and Materials (Metal 2012). Brno, Czech Republic, 23–25 May 2012.
17. Agapova L. Ya., Abisheva Z. S., Kilibaeva S. K., Altenova A. N., Yakhiyaeva Zh. E., Ruzakhunova G. S., Sapukov I. A., Baysakalova P. A. Electrochemical opening of technogenic wastes of heat-resistant nickel superalloys. Materials of the XX International scientific and technical conference “Scientific basis and practice of processing of ores and technogenic raw materials”. Ekaterinburg, 2015. pp. 280–285.

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