Journals →  Obogashchenie Rud →  2020 →  #4 →  Back

ArticleName Flotation of copper-molybdenum ores with household wastewater recycling
DOI 10.17580/or.2020.04.01
ArticleAuthor Pestryak I. V., Morozov V. V.

NUST MISIS (Moscow, Russia):

Pestryak I. V., Acting Head of Chair, Associate Professor, Candidate of Engineering Sciences,
Morozov V. V., Professor, Doctor of Engineering Sciences, Professor,


The conditions have been established for attaching the ionic molecular forms of fatty acids, introduced with the recycled waters, to the surface of calcium and magnesium-containing rock-forming minerals (calcite and sericite) during grinding and bulk copper-molybdenum flotation. Using the results of a thermodynamic analysis of the surface state, the concentrations of oleate ions have been determined that are sufficient for the hydrophobization of calcium and magnesium-containing minerals under grinding and flotation conditions. It has been shown that calcium oleate is attached to the surfaces of calcite and magnesium-containing sericite in an alkaline medium. The results of flotation studies confirm the possibility of preventing the recovery of rock-forming minerals into bulk concentrate. The maximum permissible concentration of oleates in recycled water has been selected, which dictates the required degree of water treatment. In order to achieve the best recycled water conditioning, the principle of the most complete mutual binding of heavy metal ions and fatty acid components with the deposition of metal oleates was used. The test results confirm the possibility of reducing the concentration of oleate ions in the recycled water to less than 1 mg/l. The flotation process using the selected conditioning technology for TSF filtrates, wastewater from urban sewage treatment plants and CHP ash dump discharge water allowed increasing the recovery of copper and molybdenum by 0.7–0.8 % relative to the design process that envisages the discharge of all wastewater directly into the tailings storage facility. The results obtained served as the basis for the application of the low-reagent technology for joint conditioning of heavily contaminated waters at the concentrator of Erdenet GOK.

keywords Сopper-molybdenum ores, calcite, sericite, hydrophobization, recycled water, fatty acids, conditioning

1. Baatarkhuu Zh., Khandmaa S. Technological classification of impurities in the circulating waters of concentration plants processing non-ferrous metal ores. Abstracts of the scientific-practical conference JV «Erdenet». Erdenet, 1998. pp. 48–49.
2. Pestryak I. V. Development and justification of efficient methods for recycling water conditioning at processing plants. Gornyi Informatsionno-analiticheskiy Byulleten'. 2018. No. 7. pp. 153–159.
3. Orekhova N. N., Shadrunova I. V., Volkova N. A., Novikova N. G. Ecological monitoring of waters mining industry having technogenesis as a basis for selecting strategy and technology of their processing. Proc. of the XXIX IMPC, Moscow, September 17–21, 2018. Pt. 7. Environmental problems and recycling of mineral-containing waste products. Paper 266. pp. 115–122. USB flash drive.
4. Morozov V. V. Modeling the interaction of organic components of circulating waters with rock-forming minerals during the beneficiation of polymetallic ores. Gornyi Informatsionno-analiticheskiy Byulleten'. 1995. No. 6. pp. 65–72.

5. Izoitko V. M. Technological features of molybdenum ores. Gornyi Zhurnal. 1997. No. 4. pp. 20–24.
6. Technological instruction for the beneficiation of copper-molybdenum ores at the beneficiation plant of the joint Mongolian-Russian enterprise «Erdenet», Mongolia. Erdenet, 2017. 194 p.
7. Pestryak I. V. Modeling and analysis of physicochemical processes in recirculating water conditioning. Fizikotekhnicheskie Problemy Razrabotki Poleznykh Iskopayemykh. 2015. No. 4. pp. 143–150.
8. Baatarkhuu Zh. Influence of the material composition of processed ores on the beneficiation technology. Tsvetnye Metally. 2007. No. 9. pp. 38–43.
9. Skrylev L. D., Sazonova V. F., Skryleva T. L. Effect of pH value on the solubility of heavy metal soaps formed by the interaction of their ions with fatty acid collectors. Izvestiya Vuzov. Tsvetnaya Metallurgiya. 1992. No. 3–4. pp. 21–25.
10. Oladapo O. F., Oladunni A. Effect of sodium oleate concentration variations on froth flotation of manganese ore. International Journal of Nonferrous Metallurgy. 2019. Vol. 8, No. 3. pp. 25–33.
11. Chuyanov G. G. Tailings ponds and wastewater treatment. Ekaterinburg: UGGU, 2005. 230 p.
12. Ihle C. F., Kracht W. The relevance of water recirculation in large scale mineral processing plants with a remote water supply. Journal of Cleaner Production. 2018. Vol. 177. pp. 34–51.
13. Abramov A. A. Flotation. Physical and chemical modeling of processes. Vol. 6. Moscow: MGGU, 2010. 607 p. 14. JANAF thermochemical tables. Third edition. Journal of Physical and Chemical Reference Data. 1985. Vol. 14, Suppl. 1.
15. Cherdantseva E. V., Geyde I. V., Kitayeva V. G., Zyskin V. M., Marina N. V., Matern A. I. Molecular absorption method for analysis of organic substances. Ekaterinburg: Publishing House of the Ural University, 2015. 96 p.
16. Bicak O., Ozturk Y., Ozdemir E., Ekmekc Z. Modelling effects of dissolved ions in process water on flotation performance. Minerals Engineering. 2018. Vol. 128. pp. 84–91.
17. Ignatkina V. A. Experimental investigation of change in the contrast between flotation properties of calcic minerals. Fiziko-tekhnicheskie Problemy Razrabotki Poleznykh Iskopayemykh. 2017. No. 5. pp. 113–122.
18. Radić R., MiloŠević Ž., Jurić S., Čudić S. Flotation of ores and waste waters. Metalurgija. 2016. Vol. 55, Iss. 4. pp. 832–834.
19. Shadrunova I. V., Orekhova N. N., Gromov M. E., Stefunko M. S. Formation of a complex of measures cleaning industrial waste. Gornyi Informatsionno-analiticheskiy Byulleten'. 2015. No. 7. pp. 109–114.

Language of full-text russian
Full content Buy