National Mineral Resources University (Mining Institute), Saint Petersburg, Russia:

D. V. Gorlenkov, Assistant, e-mail: denis.gorlenkov@gmail.com

A. N. Telyakov, Assistant Professor, e-mail: 9418960@mail.ru

A. I. Zakirova, Student, e-mail: 9455562@mail.ru

Increasing of demand for metals shows the necessity of search of new sources for their obtaining. Strengthening of ecological requirements to ore extraction leads to the processing intensification, for the purpose of more complete extraction of valuable components from raw materials. The secondary metallurgy technologies, making possible the extraction of non-ferrous and precious metals from wastes, are very important. Ecological standards become the important condition for the processing of wastes of radio-electronic technics. This article shows the compositions of radioactive scrap concentration products, and Russian concentrates with iron-nickel-cobalt and copper-zinc basis. There is described the smelting method for anodes with increased content of silicon. There are shown the graphs of dissolution potentials of obtained anodes in two electrolytes. There is described the passivation during the appearance of the film, consisting of oxide and sulfate of lead. There was made a suggestion that the lead behavior in anodes after radioactive scrap melting is similar to the behavior of lead anodes during the regeneration of copper electrolyte. The carried out experiments showed the influence of silicon on the process of electrolytic dissolution of both copper-zinc and iron-nickel-cobalt anodes. Research results defined the universality of nickel electrolyte. There was also made a conclusion that silicon may be the admixture, which can regulate and control the electrochemical dissolution process. In all cases, silicon fitted the potentiometric curve, and made possible the decreasing of anode dissolution potential, which leads to decreasing of electric energy consumption, or makes possible the increasing of current density for acceleration of electrolytic dissolution process. At the same time, addition of silicon made possible the avoiding of alloy passivation in sulfuric acid electrolyte.

1. Metal Recycling. Opportunities, Limits, Infrastructure. Report of the Global Metal Flows Working Group of the International Resource Panel of UNEP. Nairobi, Kenya : UNEP, 2013. 316 p.

2. Bosmans A., Vanderreydt I., Geysenc D., Helsena L. The crucial role of Waste-to-Energy technologies in enhanced landfill mining: a technology review. Journal of Cleaner Production. 2013. Vol. 55. pp. 10–23.

3. Amini S. H., Remmerswaal J. A. M., Castro M. B., Reuter M. A. Quantifying the quality loss and resource efficiency of Recycling by means of exergy analysis. Journal of Cleaner Production. 2007. Vol. 15, No. 10. pp. 907–913.

4. Brunner P. H., Rechberger H. Practical Handbook of Material Flow Analysis. Boca Raton : Lewis Publishers, 2004. 336 p.

5. Bodenan F., Hanrot F., Moulin I., Poirier J. Recycling physically sorted steelworks slag for the metallurgical and cement industries: conclusions of the ORLA research project. Proceedings of the 12th European Congress and exhibition on Advanced Materials and Processes “Euromat 2011”. 12–15 september 2011, Montpellier, France.

6. Tam V. W. Y., Tam C. M. A review on the viable technology for construction waste recycling. Resource Conservation Recycling. 2006. Vol. 47, No. 3. pp. 209–221.

7. Allwood J. M., Ashby M. F., Gutowski T. G., Worrell E. Material efficiency: a white paper. Resources, Conservation and Recycling. 2011. Vol. 55, No. 3. pp. 362–381.

8. Strizhko L. S., Loleyt S. I. Izvlechenie tsvetnykh i blagorodnykh metallov iz elektronnogo loma (Extraction of non-ferrous and noble metals from electronic scrap). Moscow : Ruda i Metally, 2009. 160 p.

9. Telyakov A. N., Sizyakov V. M. Teoriya i praktika izvlecheniya blagorodnykh metallov pri kompleksnoy pererabotke radioelektronnogo loma s primeneniem okislitelnoy plavki mednogo rasplava (Theory and practice of extraction of noble metals during the complex processing of radioelectronic scrap with application of oxidized smelting of copper melt). Saint Petersburg : National Mineral Resources University (Mining Institute), 2013. 190 p.

10. Telyakov A. N., Rubis S. A., Gorlenkov D. V. Razrabotka effektivnoy tekhnologii pererabotki promyshlennogo syrya, soderzhashchego blagorodnye metally (Development of efficient technology of processing of noble metal containing industrial raw materials). Zapiski Gornogo instituta = Proceedings of the Mining Institute. 2011. Vol. 192. pp. 88–90.

11. Baymakov Yu. V., Zhurin A. I. Elektroliz v gidrometallurgii (Electrolysis in hydrometallurgy). Moscow : Metallurgizdat, 1962. 116 p.

12. Perry R. H., Green D. W. Perry's chemical engineers' handbook. New York : McGraw-Hill, 1999. p. 357.