Journals →  Tsvetnye Metally →  2018 →  #4 →  Back

ArticleName Thermodynamic studies of thiol collectors sorption layer formation on the sphalerite surface under conditions of oxidation of sulphide sulphur to elemental state
DOI 10.17580/tsm.2018.04.02
ArticleAuthor Goryachev B. E., Nikolaev A. A., Kyaw Zay Ya, Morgun A. A.

National University of Science and Technology “MISiS”, Moscow, Russia:

B. E. Goryachev, Professor, Department of Mineral Processing and Technogenic Raw Materials
A. A. Nikolaev, Associate Professor, Department of Mineral Processing and Technogenic Raw Materials, e-mail:
Kyaw Zay Ya, Postgraduate student, Department of Mineral Processing and Technogenic Raw Materials
A. A. Morgun, M. D. in Metallurgy, Department of Mineral Processing and Technogenic Raw Materials


The results of thermodynamic calculations for sphalerite surface acting with thiol collectors in alkaline solutions are presented. Potassium butyl xanthate and sodium dibutyl dithiophosphate were chosen as widely used collectors for flotation of copper-zinc and polymetallic ores. Interconnection of thiol collectors were analyzed with special attention to non-activated and activated by copper ions sphalerite. The hydrophilic/hydrophobic surface compounds that are formed on sphalerite surface at pH = 8–12 in the range of collector ions concentrations and oxidation-reduction potential were determined. It brings to better understanding the reasons for insufficient flotation of sphalerite in rough and differential flotation circuits, and improving metal recovery and concentrating grade. At the initial oxidation of sulphide sulpur to elemental state in slightly alkaline conditions there was now interactions of collector ions with non-activated sphalerite surface observed. The potentiometric studies of sphalerite electrode in slightly alkaline water solutions of thiol collectors were carried out. Copper sulphate solutions were used as activator reagents. It was established that the electrode potential of sphalerite electrode changed depending on the concentration of both xanthate and dithiophosphate ions. The results indicate that ions of both thiol collectors are potential-determining for sphalerite. The experimentally established functional connections for sphalerite electrode either unactivated or activated by copper ions, revealed that there were conditions for sphalerite interaction with dibutyldithiophosphate ions in spite of the absence in the literature of value for ion product of zinc dibutyldithiophosphate.

keywords Flotation, sphalerite, thiol collectors, xanthates, dithiophosphates, sphalerite activation, electrode potential

1. Abramov A. A. Flotation methods of dressing. Moscow : Izdatelstvo «Gornaya kniga», 2017. 600 p.
2. Avdokhin V. M., Abramov A. A. Oxidation of sulphide minerals in dressing process. Moscow : Nedra, 1989. 231 p.
3. Abramov A. A. Technology of dressing of non-ferrous ores. Moscow : Nedra, 1983. 359 p.
4. Abramov A. A. Theory basis of optimization of selective flotation of sulphide ores. Moscow : Nedra, 1978. 280 p.
5. Mitrofanov S. I. Selective flotation. Moscow : Nedra, 1967. 584 p.
6. Chen Y., Chen J., Lan L., Yang M. The influence of the impurities on the flotation behaviors of synthetic ZnS. Minerals Engineering. 2012. Vol. 27/28. pp. 65–71.
7. Bocharov V. A., Ignatkina V. A. Technology of mineral dressing : in 2 volumes. Vol.1: Mineral-resource base. Dressing of non-ferrous ores, rare-metal ores and placers. Moscow : “Ore and Metals” Publishing House, 2007. 472 p.
8. Goryachev B. E., Nikolaev A. A. Principles of kinetic “ion” modeling of adsorptive collector layer at the surface of nonferrous heavy metal sulfides. Journal of Mining Science. 2013. Vol. 49, Iss. 3. pp. 499–506.
9. Goryachev B. E., Nikolaev A. A., Lyakisheva L. N. Electrochemistry of galena oxidation as the basis for optimization of agent modes in flotation of polymetallic ores. Journal of Mining Science. 2010. Vol. 46, Iss. 6. pp. 681–689.
10. Okolovich A. M., Figurkova L. I. Features of sphalerite flotation from polymetallic sulphide ores. Moscow : Nauka, 1977. 116 p.
11. Chandra A. P., Gerson A. R. A review of the fundamental studies of the copper activation mechanisms for selective flotation of the sulfide minerals, sphalerite and pyrite. Advances in Colloid and Interface Science. 2009. Vol. 145. pp. 97–110.
12. Finkelstein N. P. The activation of sulfide minerals for flotation: a review. International Journal of Mineral Processing. 1997. Vol. 52. pp. 81–120.
13. Popov S. R., Vuini D. R. The ethylxanthate adsorption on copper-activated sphalerite under flotation-related conditions in alkaline media. International Journal of Mineral Processing. 1990. Vol. 30, Iss. 3/4. pp. 229–244.
14. Finkelstein N. P. The activation of sulphide minerals for flotation: a review. International Journal of Mineral Processing. 1997. Vol. 52, Iss. 2/3. pp. 81–120.
15. Fornasiero D., Ralston J. Effect of surface oxide/hydroxide products on the collectorless flotation of copper-activated sphalerite. International Journal of Mineral Processing. 2006. Vol. 78, Iss. 4. pp. 231–237.
16. Ejtemaei M., Nguyen A.V. Characterisation of sphalerite and pyrite surfaces activated by copper sulphate. Minerals Engineering. 2017. Vol. 100. pp. 223–232.
17. Liu J., Wang Yu., Luo D., Chen L., Deng J. Comparative study on the copper activation and xanthate adsorption on sphalerite and marmatite surfaces. Applied Surface Science. 2018. Vol. 439. pp. 263–271.
18. Liu J., Wen S., Deng J. S., Chen X. M., Feng Q. C. DFT study of ethyl xanthate interaction with sphalerite (110) surface in the absence and presence of copper. Applied Surface Science. 2014. Vol. 311. pp. 258–263.
19. Rao S. R., Nesset J. E., Finch J. A. Activation of sphalerite by Cu ions produced by cyanide action on chalcopyrite. Minerals Engineering. 2011. Vol. 24, Iss. 9. pp. 1025–1027.
20. Wang J. Y., Liu Q. X., Zeng H. B. Understanding copper activation and xanthate adsorption on sphalerite by time-of-flight secondary ion mass spectrometry, X-ray photoelectron spectroscopy, and in situ scanning electrochemical microscopy. Journal of Physical Chemistry. 2013. Vol. 117 (39). pp. 20089–20097.
21. Shuy R. T. Semiconductor ore minerals. Moscow : Nauka, 1979. 288 p.
22. Chanturiya V. A., Vigdergauz V. E. Electrochemistry of sulphides. Theory and practice of flotation. Moscow : “Ore and Metals” Publishing House, 2008. 272 p.
23. Kislyakov L. D., Kozlov G. V., Nagirnyak F. I. Flotation of copper and copper-zinc ores of the Urals. Moscow : Nedra, 1966. 387 p.
24. Sorokin М. М. Flotation methods of dressing. Chemical basis of flotation. Moscow : MISiS, 2011. 410 p.
25. Kakovskiy I. A., Kosikov E. M. Investigation of kinetics of oxidation of some sulfide minerals. Obogashchenie Rud. 1975. No. 3. pp. 18–21.
26. Goryachev B. E., Nikolaev A. A. Galena oxidation mechanism. Journal of Mining Science. 2012. Vol. 48. pp. 354–362.
27. Goryachev B. E., Nikolaev A. A. Interconnection between physical-chemical characteristics of two-component solid surface wetting and floatability of the same surface particles. Journal of Mining Science. 2006. Vol. 42, Iss. 3. pp. 296–303.
28. Kakovskiy I. A., Maksimov A. V., Saburov L. V. Oxidation of some sulfides of copper-zinc ores on the example of pyrite. Obogashchenie Rud. 1979. No. 5. pp. 16–19.

Language of full-text russian
Full content Buy