ArticleName |
Effect of sodium thiosulfate on the floatability of tennantite pyrite |
Abstract |
This paper describes the results of an experimental study that looked at the combined effect of sodium thiosulfate and butyl xanthate or M-TF (a mixture of thionocarbamate and dithiophosphate) on the floatability of tennantite and pyrite, the relative adsorption of butyl xanthate and M-TF, wettability and the zeta potential at pH 8 and 12.5. The authors found that the floatability of tennantite and pyrite tend to go down as the concentration of sodium thiosulfate rises. The initial concentration of thiosulfate ions of 300 mg/l and higher would naturally impact the floatability of tennantite and pyrite, the adsorption of butyl xanthate and M-TF, as well as the wetting angle on sulphides. At pH 8 and in the presence of sodium thiosulfate (up to 300 mg/l) with M-TF, tennantite remains flotation responsive, and pyrite is almost unfloatable. When using the “thiosulfate – collector” complex, the relative adsorption on tennantite and pyrite would also drop as the concentration of thiosulfate rises. If the concentration of thiosulfate does not exceed 300 mg/l and the pH level is 8, M-TF would be adsorbed more on tennantite than on pyrite. The wetting angle of tennantite, to which M-TF only was applied, is 65 degrees. If butyl xanthate is applied, the angle is 50 degrees, and it is 50 and 70 degrees for pyrite, correspondingly. When sodium thiosulfate is present, the contact angle becomes smaller on either tennantite or pyrite. The angle can be bigger on tennantite if the “thiosulfate – M-TF” complex is applied. The “thiosulfate – M-TF” complex leads to a predominant surface hydrophilisation of pyrite almost within the entire range of sodium thiosulfate concentrations in view. In the presence of sodium thiosulfate and at pH 8 with M-TF and butyl xanthate, the zeta potentials of ultrafine tennantite and pyrite particles (4 μm) have close values, which indicates the non-selectivity of ultrafine sulphide slimes. With the help of an experimental study involving monominerals, the authors demonstrate that tennantite can be more floatable at pH 8 if M-TF is applied (C = 10–4 mol/l). The recovery of tennantite and pyrite in a concentrate drops as the initial concentration of thiosulfate rises to 300 mg/l and higher. The results of the study suggest how the contrasting flotation properties of tennantite and pyrite can be enhanced in a weakly alkaline limy medium (pH 8) in the presence of M-TF and thiosulfate (up to 300 mg/l). Thus, these findings could be useful when developing flotation regimes involving reagents. This research was funded by the Russian Foundation for Basic Research under the Project No. 18-35-00213. |
References |
1. Bocharov V. A. Basic principles in the flotation of refractory pyrite copperzinc ores. Benefication of the copper and copper-zinc ores of the Urals region : monograph. Ed. by V. A. Chanturiya, I. V. Shadrunova. Moscow : Nauka, 2016. Chapter 4. pp. 150–184. 2. Bocharov V. A., Ignatkina V. A., Kayumov A. A. Fahl ore flotation. Journal of Mining Science. 2015. Vol. 51, No. 3. pp. 573–579. 3. Rincon J., Gaydardzhiev S., Stamenov L. Investigation on the flotation recovery of copper sulphosalts through an integrated mineralogical approach. Minerals Engineering. 2019. Vol. 130. pp. 36–47. 4. Pshenichnyy G. N., Rykus N. G. Fahl ores of the Uchaly and Novo-Uchalinsk pyrite copper-zinc deposits (Southern Urals) : Preliminary report to be presented to the Presidium of the Ufa Scientific Centre of the Russian Academy of Sciences. Ufa : UfNTs RAN, 2001. 75 p. 5. Ignatkina V. А., Bocharov V. А., Milovich F. O., Ivanova P. G., Khachatryan L. S. Base metals sulfides flotation response increase with application of sulfhydric collectors combinations. Obogashchenie Rud. 2015. No. 3. pp. 18–24. DOI: 10.17580/or.2015.03.03 6. Ignatkina V. A., Bocharov V. A., Diachkov F. G. Use of sulfhydric collectors of different molecular structures for increased contrast of the flotation properties of non-ferrous metal sulphides found in polymetallic ores. Fiziko-tekhnicheskie problemy razrabotki poleznykh iskopaemykh. 2014. No. 6. pp. 161–170. 7. HouqinWu, JiaTian, LonghuaXu, Shuai Fang, Zhenyue Zhang, Ruan Chi. Flotation and adsorption of a new mixed anionic/cationic collector in the spodumene-feldspar system. Minerals Engineering. 2018. Vol. 127. pp. 42–47. 8. Lotter N. O., Bradshaw D. J. The formulation and use of mixed collectors in sulphide flotation. Minerals Engineering. 2010. Vol. 23, Iss. 11–13. pp. 945–951. 9. Buckley A. N., Hope G. A., Parker G. K., Steyn J., Woods R. Mechanism of mixed dithiophosphate and mercaptobenzothiazole collectors for Cu sulfide ore minerals. Minerals Engineering. 2017. Vol. 109. pp. 80–97. 10. Hanumantha Rao K., Forssberg K. S. E. Mixed collector systems in flotation. International Journal of Mineral Processing. 1997. Vol. 51, Iss. 1–4. pp. 67–79. 11. Bocharov V. A., Ignatkina V. A. Mineral beneficiation technology. Moscow : “Ore and Metals” Publishing House, 2007. Vol. 1. 472 p. 12. Yianatos J., Carrasco C., Vinnett L., Rojas I. Pyrite recovery mechanisms in rougher flotation circuits. Minerals Engineering. 2014. Vol. 66–68. pp. 197–201. 13. Mermillod-Blondin R., Kongolo M., de Donato R. Pyrite flotation with xantate under alkaline conditions – applicatiоn to environmental desulfurization. Century of Flotation Symposium. Brisbane, QLD, 6–9, June 2005. pp. 683–692. 14. Bocharov V. A., Ignatkina V. A., Viduetskiy M. G. Factors determining the ionic composition of the slurry’s liquid phase and the process water in the flotation of sulphide ores. Gornyy informatsionno-analiticheskiy byulleten. 2006. pp. 385–392. 15. Abramov A. A. Flotation. Sulphide minerals : Collected writings. Vol. 8. Moscow : Gornaya kniga, 2013. 704 p. 16. Sorokin M. M. Flotation: modifiers. Physical basis. Practicum. Moscow : MISIS Publishing House, 2016. 372 p. 17. Sajjad Aghazadeh, Seyed Kamal Mousavinezhad, Mahdi Gharabaghi. Chemical and colloidal aspects of collectorless flotation behavior of sulfide and non-sulfide minerals. Advances in Colloid and Interface Science. 2015. Vol. 225. pp. 203–217. 18. Ignatkina V. A. Theory and practice of selecting sulfhydric collectors in the flotation of pyrite copper and copper-zinc ores. Benefication of the copper and copper-zinc ores of the Urals region : monograph. Ed. by V. A. Chanturiya and I. V. Shadrunova. Chapter 5. Moscow : Nauka, 2016. pp. 185–220. 19. Bocharov V. A., Ignatkina V. A. On the choice of processing routes for pyrite-pyrrhotite copper-zinc ores. Proceedings of the international conference “CIS Congress on Ore Beneficiation”. 2015. pp. 457–464. 20. Petrus H. T. B. M., Hirajima T., Sasaki K., Okamoto H. Effects of sodium thiosulphate on chalcopyrite and tennantite: An insight for alternative separation technique. International Journal of Mineral Processing. 2012. Vol. 102–103, Iss. 25. pp. 116–123. 21. Senior G. D., Guy P. J., Bruckard W. J. The selective flotation of enargite from other copper minerals — a single mineral study in relation to beneficiation of the Tampakan deposit in the Philippines. International Journal of Mineral Processing. 2006. Vol. 81. pp. 15–26. 22. Petrus H. T. B. M., Hirajima T., Sasaki K., Okamoto H. Study of diethyl dithiophosphate adsorption on chalcopyrite and tennantite at varied pHs. Journal of Mining Science. 2011. Vol. 47, Iss. 5. pp. 695–702. 23. Petrus H. T. B. M., Hirajima T., Sasaki K., Okamoto H. Effect of pH and diethyl dithiophosphate (DTP) treatment on chalcopyrite and tennantite surfaces observed using atomic force microscopy (AFM). Colloids and Surfaces A: Physicochemical and Engineering Aspects. 2011. Vol. 389, Iss. 1–3. pp. 266–273. 24. Zhao Cao, Xumeng Chen, Yongjun Peng. The role of sodium sulfide in the flotation of pyrite depressed in chalcopyrite flotation. Minerals Engineering. 2018. Vol. 119. pp. 93–98. 25. Jingjing Xiao, Guangyi Liu, Hong Zhong, Yaoguo Huang, Zhanfang Cao. The flotation behavior and adsorption mechanism of O-isopropyl-S-[2-(hydroxyimino) propyl] dithiocarbonate ester to chalcopyrite. Journal of the Taiwan Institute of Chemical Engineers. 2017. Vol. 71. pp. 38–46. 26. Yagudina Yu. R. Development and substantiation of the combined processing technology for tennantite ores found in the copper-pyrite deposits of the Urals region : PhD dissertation. Nosov Magnitogorsk State Technical University. Magnitogorsk, 2015. 165 p. 27. Mitrofanov S. I., Barskiy L. A., Samychin V. D. Analysing the washability of ores. Moscow : Nedra, 1981. 287 p. 28. Kolthoff I.M., Belcher R., Stenger V.A., Matsuyama G. Volumetric analysis. Vol. 3. Moscow : GKhI, 1961. 842 p. 29. Ignatkina V. A., Bocharov V. A., Aksenova D. D., Kayumov A. A. Zeta Potential of the Surface of Ultrafine Sulfides and Floatability of Minerals. Russian Journal of Non-Ferrous Metals. 2017. Vol. 58, No. 2. pp. 95–100. |