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CONTRIBUTION OF THE NORTH-EASTERN FEDERAL UNIVERSITY TO DEVELOPMENT IN THE MINERAL MINING INDUSTRY AND PERSONNEL TRAINING
MINERAL PROCESSING
Название Thermal-adhesion method to pick and extract diamond grains from kimberlite concentrate
DOI 10.17580/gzh.2016.09.12
Автор Sharin P. P., Lebedev M. P., Nikitin G. M., Vinokurov G. G.
Информация об авторе

Ammosov North-Eastern Federal University, Yakutsk, Russia:

P. P. Sharin, Head of a Chair, Candidate of Physico-Mathematical Sciences, psharin1960@mail.ru
M. P. Lebedev, Head of a Chair, Doctor of Engineering Sciences, Corresponding Member of the Russian Academy of Sciences

 

Yakutniproalmaz Institute, Mirny, Russia:
G. M. Nikitin, Deputy Director of Innovation – Head of the Center for Innovation and Technology

 

Larionov Institute of Physico-Technical Problems of the North, Siberian Branch, Russian Academy of Sciences:
G. G. Vinokurov, Leading Researcher, Candidate of Engineering Sciences

Реферат

This research aims to develop a thermal-adhesion method of automated extraction of diamond grains from kimberlite concentrate after X-ray fluorescent separation. The method is based on the very large difference between thermal conductivities of diamonds and associate minerals in concentrates. A pilot plant has been designed to examine production processes of thermal-adhesion picking and extraction of diamond grains from kimberlite ore concentrate. Based on the analysis of strength of contact between thermal-adhesive substances and diamonds, it is recommended to use pure colophony as the thermal-adhesive substance. High selectivity and efficiency of the developed method for thermal-adhesion picking and extraction of diamond grains has experimentally been proved. It is found that diamond grains securely stick to colophony layer applied to special launders on the surface of conveyor belt. Extraction capacity per one launder of the pilot plant makes 18 000–36 000 grains/hour. Based on the experimental research, the pilot plant process variables are developed as: heater-roller temperature 150–350 ºС; colophony layer thickness 0.5–0.9 mm; conveyor belt velocity 30–100 mm/s. The developed method of thermal-adhesion extraction of diamonds from concentrates is secured by the patent of the Russian Federation.

Ключевые слова Kimberlite ore, diamonds, thermal conductivity, thermal-adhesion method, colophony, diamond extraction
Библиографический список

1. Milashev V. A. Diamonds of Russian Polar Region. Gornyi Zhurnal. 2013. No. 11. pp. 47–51.
2. Shirey S. B., Harris J. W., Richardson S. H., Fouch M. J., James D. E., Cartigny P., Deines P., Viljoen F. Diamond Genesis, Seismic Structure, and Evolution of the Kaapvaal-Zimbabwe Craton. Science. 2002. Vol. 297. pp. 1683–1686.
3. Banas A., Stachel Th., Muehlenbachs K., McCandless T. E. Diamonds from the Buffalo Head Hills, Alberta: Formation in a non-conventional setting. Lithos. Elsevier, 2007. pр. 199–213. doi: 10.1016/j.lithos.2006.07.001
4. Tappert R., Tappert M. C. Diamonds in Nature: a guide to rough diamonds. Springer, 2011. 142 p.
5. Howell D. Strain-induced birefringence in natural diamond: a review. European Journal of Mineralogy. 2012. Vol. 24. pp. 575–585.
6. Mukhin P. A, Ryu G., Francheskini D. Off shore diamond exploration and mining in Central Namibia. Gornyi Zhurnal. 2015. No. 1. pp. 85–97.
7. Pastewka L., Moser S., Gumbsch P., Moseler M. Anisotropic mechanical amorphization drives wear in diamond. Nature Materials. 2011. Vol. 10(1). pp. 34–38. doi: 10.1038/nmat2902
8. Maréchal A., Rouger N., Crebier J.-C., Pernot J., Koizumi S., Teraji T., Gheeraert E. Model implementation towards the prediction of J(V) characteristics in diamond bipolar device simulations. Diamond and Related Materials. 2014. Vol. 43. pp. 34–42.
9. Gatto Monticone D., Quercioli F., Mercatelli R., Soria S., Borini S., Poli T., Vannoni M., Vittone E., Olivero P. Systematic study of defect-related quenching of NV luminescence in diamond with time-correlated single-photon counting spectroscopy. Physical Reviews. 2013. Vol. 88. pp. 155–201.
10. Dementev V. E., Voyloshnikov G. I., Kononko R. V. Improvement of methods for recovery of precious metals and diamonds from minerals. Gornyi Zhurnal. 2015. No. 9. pp. 28-32. doi: 10.17580/gzh.2015.09.05
11. Fedorov I. I., Chepurov A. A., Dereppe J. M. Redox conditions of metal-carbon melts and natural diamond genesis. Geochemical Journal. 2002. Vol. 36. pp. 247–253.
12. Chanturiya V. A., Chaadaev A. S., Dvoychenkova G. P., Ostrovskaya G. Kh., Trofimova E. A. Emulsion method of purification of diamond containing adhesiveness and foam separation concentrates from the organic impurities. Gornyi Zhurnal. 2012. No. 12. pp. 79–83.
13. Wei L., Kuo P. K., Thomas R. L., Anthony T. R., Banholzer W. F. Thermal conductivity of isotopically modified single crystal diamond. Physical Reviews Letters. 1993. Vol. 70. pp. 3764.
14. Shvartsman Yu. G. Thermal state of Zimneberezhnyy diamond-bearing region lithosphere. Geodynamics, magnetism, sedimentogenezis and minerageny of Russian North-West : materials of All-Russian conference. Petrozavodsk, 200. pp. 436–439.
15. Dortman N. B. Physical properties of rocks and minerals. Moscow : Nedra, 1984. 455 p.
16. Bukhmirov V. V., Rakutina D. V., Solnyshkova Yu. S. References for the solving of «Heat and mass transfer» course problems. Ivanovo : Ivanovo State Energetic University, 2009. 102 p.
17. Sedov L. I. Methods of similarity and dimentionality in mechanics. Moscow : Nauka, 1987. 423 p.

18. A. M. Timofeev, P. P. Sharin, M. P. Lebedev, R. G. Nogovitsyn. Method of separation of diamond-bearing mixtures of minerals. Patent RF, No. 2546702. Published: 10.04.2015. Bulletin No. 10.

Полный текст статьи Thermal-adhesion method to pick and extract diamond grains from kimberlite concentrate
Назад