Journals →  Tsvetnye Metally →  2012 →  #11 →  Back

ArticleName Complex of research and pilot-scale test on gold extraction from pox cakes of the refractory gold-uranium ores
ArticleAuthor Kurkov A. V., Egorov A. M., Pastukhova I. V., Krinov D. I., Ovcharenko E. V.

Leading Scientific and Research Institute of Chemical Technology, Moscow, Russia

A. V. Kurkov, Head of the Project Office, e-mail:
A. M. Egorov, Head of a Laboratory
I. V. Pastukhova, Leading Researcher
D. I. Krinov, Leading Researcher
E. V. Ovcharenko, Senior Researcher


A set of experimental researches on the extraction of gold and silver from unconventional sources, POX cakes of the complex uranium ores with low content of gold (~1 g/t), was performed. The complex composition of the initial crude ore determines the even more complex composition of the POX cakes. After pressure oxidation, a change in mineral composition and minerals surface parameters was revealed in the cakes. Major part of the pyrite grains is characterized by corroded surface. Compared with the original ore the concentration of iron oxides grains increases, due to the oxidation of pyrite during the pressure oxidation. The composition of these iron oxides (multiple hydrous oxides) indicates the presence of in water and hydroxyl groups in them. The surface of the iron hydrous oxides supplies cellular (porous) textures. Visible forms of precious metals were not found. Presumably, as a result of oxidation of auriferous pyrite the secondary gold is formed, which particles have nanometer size dimensions, and are closely associated with iron hydrous oxides. Despite the extraordinary complexity of the uranium crude ore that limits the possibility of its enrichment, the combination of the flotation process and hydrometallurgical processes allows to create quite an effective refractory complex uranium ores treatment technology. Throughout recovery in an enrichment of POX cakes — sorption cyanidation of the products obtained circuit were as follows: 72.3% of gold and 53.7% of silver. This is confirmed by pilot tests on bulk sample.

keywords Electron microscopy, mineral, pyrite, cake, flotation, hydrometallurgy, uranium, gold, technology, cyanidation

1. Nikolskiy A. L., Tarkhanov V. A., Shulgin A. S., Zavarzin A. V., Kozyrkov V. D., Solntseva E. B. Mineralno-syrevaya baza deystvuyushchikh i stroyashchikhsya uranovorudnykh predpriyatiy Rossii (Mineral and raw materials base of the operating and projected Russian uranium ore enterprises). Sbornik dokladov nauchno-tekhnicheskogo soveshchaniya “Uran Rossii” (Reports of Scientific and Technical Meeting “Russian uranium” ). Moscow : TsNIIATOMINFORM, 2008. pp. 26–40.
2. Krinov D. I., Bortnikov N. S., Chanturiya E. L. Novye dannye o raspredelenii samorodnogo i khimicheski svyazannogo zolota v kolchedannykh rudakh na primere Gayskogo mednotsinkovogo mestorozhdeniya (Yuzhnyy Ural) (New information about the allocation of native and chemically combined gold in the pyrite ores, by the example of Gai copper-zinc deposit (Southern Ural)). Tezisy doklada VIII mezhdunarodnoy konfrentsii «Novye idei v naukakh o zemle» (Thesis of a report from the VIII Intenational Conference “New ideas in the Earth sciences”). Moscow, 2007. Vol. 3. pp. 107–109.
3. Shatalov V. V., Kurkov A. V., Boldyrev V. A., Gushchina R. P. Primenenie flotatsionnykh protsessov dlya sozdaniya ratsionalnoy tekhnologii pererabotki kompleksnykh uranovykh rud (Application of flotation processes for the creation of rational processing technology for complex uranium ores). Tezisy vtorogo mezhdunarodnogo simpoziuma “Uran: resursy i proizvodstvo” (Thesises of the Second International Symposium “Uranium: resources and production”). Moscow : N. M. Fedorovsky All-Russian Research Institute of Mineral Raw Materials, 2009. pp. 127.
4. Kurkov A. V., Shatalov V. V. Development of technology for complex uranium ores processing on the flotation process basis. XXV International Mineral Processing Congress (IMPC) 2010 : proceedings. Brisbane, QLD, Australia, The Australasian Institute of Mining and Metallurgy Publication, 2010. Series No 7/2010. pp. 2097–2106.
5. Shatalov V. V., Kurkov A. V., Smirnov K. M. et al. Sposob pererabotki upornykh uranovykh, soderzhashchikh pirit i blagorodnye metally materialov dlya izvlecheniya urana i polucheniya kontsentrata blagorodnykh metallov (Processing approach of the persistent uranium materials and materials, which contain pyrite and noble metals for uranium extraction and obtaining of noble metals concentrate). Patent RF, No. 2398903. Published 2010. Bulletin No. 25.

Language of full-text russian
Full content Buy