Kaluga branch of Bauman Moscow State Technical University, Kaluga, Russia:

I. V. Fedoseev, Professor of a Chair of Chemistry, e-mail: prof.Igor.Fedoseev@gmail.com

National Mineral Resources University (University of Mines), Saint Petersburg, Russia:
M. Sh. Barkan, Assistant Professor of a Chair of Geoecology

Modernization of metallurgical processes of MMC Norilsk Nickel is aimed at formation of new technogenic products, containing platinum metals (in particular – insoluble residual products of leaching of Bessemer matte, nickel concentrate, etc). These products are primary poor bulk concentrates of platinum metals. The paper describes quite new technology of processing of poor bulk concentrates of platinum metals into rich selective concentrates of platinum metals PK-1 (platinum-palladium) and PK-2 (concentrates of rare platinum metals, such as Rh, Ru and Ir). For this purpose, poor bulk concentrates of platinum metals are subjected to flotation with their following dissolving by hydrochlorination. The obtained solution is treated by gas, containing CO (producer gas) at the temperature of 20–60 ^оC and atmospheric pressure (hydrocarbonyl process). As a result, there is formed a precipitation of sum of Pt, Pd, Au, Ag, Se and Te (equal to PK-1). After removing of Se and Te by pyro- and hydrometallurgical methods, there is obtained the concentrate with sum of Pt, Pd (98%) and sum of Cu, Ni, Fe (<0,25%). The precipitate, containing all residual precious metals in solution, is obtained from filtrate because of isolation (extraction) of PK-1 under the influence of precipitating agents. This precipitate is converted into PK-2 concentrate, which contains 30–35% of sum of Rh, Ru and Ir; 5–7% of sum of Pt and Pd; 45–50% of Ag; and 7–10% of sum of Cu, Ni and Fe. As a result, almost complete recovery of precious metals into PK-1 and PK-2 selective concentrates is reached, which meets the requirements of the refining process at Krasnoyarsk plant.

1. Naftal M. N., Vydysh A. V., Timoshenko E. M., Ryleev V. A., Petrov A. F. Osobennosti i tendentsii razvitiya avtoklavnoy gidrometallurgii tyazhelykh tsvetnykh metallov na rubezhe XXI stoletiya (Peculiarities and tendencies of development of autoclave hydrometallurgy of heavy non-ferrous metals at the turn of XXI century). Tsvetnye Metally = Non-ferrous metals. 2007. No. 7. pp. 53–60.
2. Kalashnikova M. I., Saltykov P. M., Shneerson Ya. M., Saltykova E. G. Avtoplavilnaya pererabotka nikelsoderzha shchikh sulfidnykh kontsentratov (Auto-fusion processing of nickel-containing sulfide concentrates). Tsvetnye Metally = Non-ferrous metals. 2009. No. 9. pp. 59–65.
3. Kalashnikova M. I., Saltykov P. M., Saltykova E. G., Khomchenko O. A. Gidrometallurgicheskaya tekhnologiya pererabotki nikelevogo kontsentrata kombinata “Pechenganikel” (Hydrometallurgical technology of processing of nickel concentrate of “Pechenganikel” combine). Tsvetnye Metally = Non-ferrous metals. 2010. No. 10. pp. 22–27.
4. Shestakova R. Kh., Petrov A. F., Batsukov I. V. Vliyanie usloviy atmosfernoy medeochistki nikel-kobaltovykh rastvorov na pokazateli avtoklavnoy pererabotki vysokomedistogo kontsentrata (Influence of conditions of atmosphere copper-purification of nickel-cobalt solutions on indicators of auto-fusion processing of highcopper concentrate). Tsvetnye Metally = Non-ferrous metals. 2006. No. 12. pp. 26–28.
5. Tsapakh S. L., Khemidov K. A., Khomchenko O. A., Sadovskaya G. I. Zakonomernosti protsessov pererabotki medno-nikelevogo faynshteyna k khlornoy tekhnologii proizvodstva elektrolitnogo nikelya (Peculiarities of processing of copper-nickel converter matte to chlorine electrolytic nickel production technology). Tsvetnye Metally = Non-ferrous metals. 2009. No. 9. pp. 72–75.
6. Shestakova R. Kh., Petrov A. F., Asonova I. I., Kronachev G. A., Dmitriev I. V. Vovlechenie tekhnologicheskogo syrya v avtoklavnuyu okislitelnuyu tekhnologiyu pererabotki pirrotinovykh kontsentratov (Involving of technological raw materials in autoclave oxidation technology of processing of pyrrhotine concentrates). Tsvetnye Metally = Non-ferrous metals. 2004. No. 11. pp. 41–44.
7. Zatnitskiy B. E., Volkov B. V., Shalygina E. M. Povedenie osnovnykh komponentov nikelevogo kontsentrata ot razdeleniya faynshteyna pri gidrokhlorirovanii (Behavior of basic components of nickel concentrate from separation of converter matte in the time of hydrochlorination). Tsvetnye Metally = Non-ferrous metals. 2004. No. 1. pp. 26–28.
8. Lastochkina M. A., Vergizova T. V., Greyver T. N. Poluchenie bogatykh kontsentratov platinovykh metallov iz produktov medno-nikelevogo proizvodstva (Obtaining of rich concentrates of platinum metals from copper-nickel manufacturing products). Tsvetnye Metally = Non-ferrous metals. 2009. No. 9. pp. 66–71.
9. Fedoseyev I. V. Hydrocarbonylation in Platinum Metals Metallurgy. Platinum Metals Review. 1996. Vol. 40 (3). pp. 118–125.
10. Fedoseev I. V. Gidrokarbonilnye protsessy v tekhnologii platinovykh metallov (Hydrocarbolyl processes in platinum metals technology). Tsvetnye Metally = Non-ferrous metals. 2006. No. 8. pp. 76-82.
11. Fedoseev I. V. Ekstraktsiya karbonilnykh kompleksov rodiya, ruteniya i iridiya (Extraction of carbolyl complexes of rhodium, ruthenium and iridium). Tsvetnye Metally = Non-ferrous metals. 2009. No. 10. pp. 24–26.