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ArticleName Enrichment indicators for materials with a predominance of fine-graded gold before and after thermal processing on the example of carbonate-silicate ore
DOI 10.17580/tsm.2016.12.01
ArticleAuthor Amdur A. M., Tsypin E. F., Matushkina A. N.
ArticleAuthorData

Ural State Mining University, Ekaterinburg, Russia:

A. N. Matushkina, Post-Graduate Student, e-mail: annamat87@mail.ru
A. M. Amdur, Head of a Chemistry Chair, e-mail: engineer-ektb@rambler.ru
E. F. Tsypin, Professor, e-mail: Tsipin.E@mail.ru

Abstract

The designed method for extraction of fine-graded gold from refractory carbonatesilicate ores was realized in laboratory conditions. In the base ore, gold is associated with pyrite and arsenopyrite, whilst it also present in quartz and minerals, and it is not extracted through cyanidation, the sizes of Au grains varied from fractions to 10 micrometers. The material was heated, melted, and after cooling it was grinded and enriched by using a centrifugal Knelson concentrator. After melting the material at the temperature of 1250 oC, drops of gold were floated — under the influence of interphase tension — by carbon oxide bubbles, which are formed during decomposition of carbonates. The process of flotation is accompanied by coagulation. The outcome is a concentration of gold on the surface of the formed oxide melt and enlargement of particles up to the sizes that allow extraction of Au through gravitational methods. In this way, during the process of heating and melting of ore mass, gold switches to a free state, while its particles are enlarged up to 100 micrometers. This enables a significant increasing of its extraction by gravitational methods. During the laboratory cyanidation in neutral and alkaline solutions, by adding KCN while mixing air with access of oxygen for 24–28 hours, the extraction of gold reaches 100% as a result of thermal treatment.
This work was carried out within the project part of the state task of the Russian Ministry of Education and Science and the grant of the Russian Foundation for Basic Research No. 16-08-00768\16.

keywords Dispersed gold, enrichment, extraction of gold, gravitational enrichment, drops, porous bodies, capillary pressure, floatation, interphase tension, heating
References

1. Zakharov B. A., Meretukov M. A. Zoloto: upornye rudy (Gold: refractory ores). Moscow : “Ore and Metals” Publishing House, 2013. 452 p.
2. Hough R. M., Reich R. Noble Metal Nanoparticles in Ore Systems. Nature's Nanostructures. Ed. : A. S. Barnard, Haibo Guo. Singapore : Pan Stanford Publishing Pte. Ltd, 2012. p. 306.
3. The real value of gold in the ground. Cipher Research Report, 2015. May 31. Available at: http://www.cipherresearch.com/reports/150601_The-Real-Valueof-Gold-in-the-Ground.pdf
4. Kuzmenko A. P., Rasskazov I. Yu., Leonenko N. A., Kapustina G. G., Silyutin I. V., Li J., Kuzmenko N. A., Khrapov I. V. Thermocapillary extraction and laser-induced agglomeration of fine gold out of mineral and waste complexes. Journal of Mining Science. 2011. Vol. 47, No. 6. pp. 850–860.
5. Gorain B. K., Kondos Peter D., Lakshmanan V. I. Innovations in Gold and Silver Processing. Innovative Process Development in Metallurgical Industry. 2016. Part VIII. pp. 393–428.
6. Amdur A. M., Apakashev R. A., Davydov S. Ya., Matushkina A. N. Ustroystvo dlya obogashcheniya zolotosoderzhashchego mineralnogo materiala (A tool for enrichment of gold-bearing mineral material). Patent RF, No. 161572. Applied : 28.07.2015. Published : 27.04.2016.
7. Zhong-Mei Sun, Chun-Bao Sun, Ji-Zhen Wang, Wan-Zhong Yin. Optimization and mechanism of gold-bearing sulfide flotation. Rare Metals. 2014. Vol. 33, No. 3. pp. 363–368.
8. Tabatabaei R. H., Nagaraj D. R., Vianna S. M. S. M., Napier-Munn T. J., Gorain B. The effect of non-sulphide gangue minerals on the flotation of sulphide minerals from Carlin-type gold ores. Minerals Engineering. 2014. Vol. 60. pp. 26–32.
9. Matushkina A. N., Amdur A. M., Gazaleeva G. I., Vlasov I. A. Sposob izvlecheniya zolota iz trudnoobogatimykh rud s pomoshchyu temperaturnoy obrabotki (Method of extracting gold from refractory ores with temperature treatment). Izvestiya vysshikh uchebnykh zavedeniy. Gornyy zhurnal = News of the Higher institutions. Mining Journal. 2014. No. 5. pp. 129–132.
10. Chryssoulis S. L., McMullen J. Mineralogical investigation of gold ores. Advances in gold ore processing. Ed. : M. D. Adams. Amsterdam : Elsevier, 2005. pp. 21–72.
11. Ertseva L. N. Opyt primeneniya metodov rastrovoy elektronnoy mikroskopii i rentgenospektralnogo mikroanaliza dlya issledovaniya materialov tsvetnoy metallurgii (Experience of application of scanning electron microscopy and X-ray spectral microanalysis for investigation of non-ferrous metallurgy materials). Tsvetnye Metally = Non-ferrous metals. 2011. No. 8/9. pp. 33–36.
12. Senchenko A. E. Flyuidizatsiya v pulsiruyushchem rezhime pri tsentrobezhnom obogashchenii mineralnogo syrya (Fluidization in pulsing mode during the centrifugal concentration of mineral raw materials). VIII Kongress obogatiteley stran SNG : sbornik dokladov. Tom I (VIII Congress of the dressers of CIS countries: Collection of reports. Volume I). Moscow : MISiS, 2011. 364 p.
13. Amdur A. M., Vatolin N. A., Fedorov S. A., Matushkina A. N. Dvizhenie dispersnykh kapel zolota v poristykh telakh i oksidnykh rasplavakh pri nagreve (Movement of disperse drops of gold in porous bodies and oxide melts during the heating). Doklady Akademii nauk = Reports of Academy of Sciences. 2015. Vol. 465, No. 3. pp. 307–309.
14. Crundwell F. K. The dissolution and leaching of minerals. Mechanisms, myths and misunderstandings. Hydrometallurgy. 2013. Nо. 139. pp. 132–148.
15. Kuskov V. B., Kuskova Ya. V., Ananenko K. E. Ispolzovanie gravitatsionnotsentrobezhnykh apparatov dlya razdeleniya melkikh chastits (Gravitycentrifugal apparatuses application for fine particles separation). Obogashchenie Rud = Mineral processing. 2012. No. 2. pp. 102–106.
16. Sedelnikova G. V. Mirovaya praktika pererabotki upornykh zolotosulfidnykh rud i kontsentratov (Global practice of processing of refractory gold-sulfide ores and concentrates). Vestnik Kazakhstanskoy natsionalnoy akademii estestvennykh nauk. Plaksinskie chteniya – 2014 = Bulletin of Kazakhstan National Academy of Natural sciences. Plaksin readings – 2014. 2014. Vol. 3. pp. 42–44.

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