Journals →  Gornyi Zhurnal →  2017 →  #4 →  Back

EQUIPMENT AND MATERIALS
ArticleName Separation characteristics of centrifuge machines
DOI 10.17580/gzh.2017.04.15
ArticleAuthor Ananenko K. E., Kondratyeva A. A., Zashikhin A. V.
ArticleAuthorData

Siberian Federal University, Krasnoyarsk, Russia:

K. E. Ananenko, Associate Professor, Candidate of Engineering Sciences
A. A. Kondratyeva, Senior Lecturer, ankondratieva@mail.ru

 

Institute of Chemistry and Chemical Technology, Siberian Branch, Russian Academy of Science, Krasnoyarsk, Russia:
A. V. Zashikhin, Researcher, Candidate of Engineering Sciences

Abstract

Refinement of rough gold concentrates is the final and one of the most signifi cative stages of placer gold recovery. First, the refinement flow charts use standard processing equipment: jig washers, concentration tables and centrifuge machines. The final stage of refinement may employ magnetic fluid separators in combination with the preparatory magnetic separation, and various cradles. Gold loss in refinement can reach high values – 10% and above. In connection with this, it is urgent and important to improve gold recovery efficiency at the stage of refinement of rough god concentrates. The current approach to cleaning circuit design is based on the use of mineral processing machines separation performance of which is characterized by such indexes as density or size of particles. When gold recovery circuits are designed, simplified separation characteristics are chosen; these characteristics satisfactorily model gold recovery though disregard the behavior of smaller density grains, in particular, aggregates of gold and primary concentrate minerals. Aiming at more appropriate uncomplicated model, it is suggested to use a set of separation characteristics for gold and for primary concentrate minerals, and the latter in this case will model the behavior of gold aggregates as well. The article describes the research findings on separation characteristics for mineral with the comparable density to primary concentrate minerals – ferrosilicium. The research involved centrifuge concentrators Itomak KN-0.1 and Falcon L40 and centrifuge jig washer Kelsey J200. The results make it possible to define the recovery index for mineral of certain specific weight given the known grain-size composition of the valuable component.

keywords Separation characteristics, gold, gravity concentration machines, experimental research, centrifuge concentrators, centrifuge jig washer
References

 

1. Ananenko K. E. Optimization of process flowsheets of rough gold-bearing concentrates finishing: Dissertation … of Candidate of Engineering Sciences. Krasnoyarsk, 2011. 187 p.

2. Kuskova Ya. V. Increasing of efficiency of concentration of fine ore fractions and materials using gravitation-centrifugal separation : Dissertation … of Candidate of Engineering Sciences. Saint Petersburg, 2012. 175 p.
3. Van Loon S., Bond J. D. Yukon Placer Mining Industry 2010 to 2014. Whitehorse : Yukon Geological Survey, 2014. 239 p.
4. Avdokhin V. M. Basis of mineral concentration. Third edition. Moscow : Gornaya kniga, 2014. Vol. 2. Mineral concentration technologies. 310 p.
5. Barchenkov V. V. Basic technological processes of gold-bearing ores processing. Saint Petersburg : ITs «Intermediya», 2013. 476 p.
6. Fedotov K. V., Nikolskaya N. I. Design of concentration plants : tutorial for universities. Moscow : Gornaya kniga, 2012. 536 p.
7. Sadeghi M., Bazin C., Renaud M. Effect of wash water on the mineral size recovery curves in a spiral concentrator used for iron ore processing. International Journal of Mineral Processing. 2014. Vol. 129. pp. 22–26.
8. Clarkson G., Clarkson R., Hitch M. Exploiting the malleability of gold for placer concentrate extraction and recovery. Minerals Engineering. 2016. Vol. 94. pp. 38–40.
9. Algebraistova N. K., Makshanin A. V., Burdakova E. A., Samorodskiy P. N., Markova A. S. Development of stage gravity fl owsheet for recovery of noble metals. Obogashchenie Rud. 2015. No. 2. pp. 3–7.
10. Komogortsev B. V., Varenichev A. A., Potapov I. I. Intensification of washing and gravitation concentration of gold-bearing raw materials. Problemy okruzhayushchey sredy i prirodnykh resursov. 2015. No. 8. pp. 113–125.
11. Antsiferova S. A., Markosyan S. M. Centrifugal concentration and flotation for the recovery of gold from ore of Vorontsov mine. Sovremennye problemy nauki i obrazovaniya. 2015. No. 2-2. p. 97.
12. Tikhonov O. N. Theory of mineral separation. Saint Petersburg : SPGGI, 2008. 514 p.
13. Solodenko A. A. Testing of centrifugal concentrators Falcon efficiency during the concentration of gold-bearing ore on native deposit. Tsvetnaya metallurgiya. 2012. No. 6. pp. 39–41.
14. Ofori-Sarpong G., Amankwah R. K. Comminution environment and gold particle morphology: Effects on gravity concentration. Minerals Engineering. 2011. Vol. 24, Iss. 6. pp. 590–592.
15. Singh R. K., Das A. Analysis of separation response of Kelsey centrifugal jig in processing fine coal. Fuel Processing Technology. 2013. Vol. 115. pp. 71–78.

 

Language of full-text russian
Full content Buy
Back