Saint Petersburg Mining University (Saint Petersburg, Russia):

Avksentiev S. Yu., Associate Professor, Candidate of Engineering Sciences, Avksentev_SYu@pers.spmi.ru
Makharatkin P. N., Associate Professor, Candidate of Engineering Sciences
Safiullin R. N., Professor, Doctor of Engineering Sciences
Aleksandrov V. I., Professor, Doctor of Engineering Sciences

Mining transportation systems are evolving through the introduction of continuous transportation solutions, hydraulic pipeline transport being the most common of them. Considering the high labor and energy intensity of equipment operation, accelerated hydroabrasive wear of pipelines, and elevated metal consumption, respective mining hydrotransport efficiency assessments indicate a significant streamlining potential. Energy intensity of any transportation process depends on the specific head loss Icm and the concentration of the solid phase. Lower pressure losses and higher concentrations reduce the energy requirements for pumping a given volume of solid materials (tailings) and, consequently, improve the resulting hydraulic transport efficiency. The purpose of this work was to establish the change patterns for specific head losses at varying solid phase concentrations in the flow during hydraulic transportation of overflow hydrocycloning products via 800–1000 mm metal pipes with a mass fraction of the solid phase of 17 % (±5 %), as well as to develop recommendations for the design of tailing facilities of the Kachkanar GOK. The experiments conducted have established that specific head losses are directly proportional to concentrations of the solid phase in the tailings slurry. Higher solid phase concentrations and hydrotransport system throughput lead to increased pressure losses. This happens because elevated solid phase concentrations trigger the manifestation of rheological properties of the slurry in the liquid flow, affecting the specific head loss. The research results obtained are reflected in the reconstruction and development design for the plant.

1. Kibirev V. I., Dedushenko I. A., Avksentyev S. Yu., Aleksandrov V. I. Energy efficiency of application of pipes with polyurethane coating. Obogashchenie Rud. 2017. No. 2. pp. 54–59. DOI: 10.17580/or.2017.02.10.
2. Skrebnev V. I., Serjan S. L., Kalugina E. V. Research of resistance to water-jet wear of plastic and steel pipes. Assessment of the main parameters that affect the wear rate of hydraulic transport systems. Plasticheskie Massy. 2020. No. 9–10. pp. 40–44.
3. Antoev K. P., Popov S. N. Study of resistance to hydroabrasive wear of GRP pipes with a polyurethane coating. Nauka i Obrazovanie. 2017. No. 1. pp. 87–90.
4. Kovriga V. V., Gumen V. R., Sevastyanov V. V., Kachalina A. L. Unifed indicator of the wear of plastics for different assessment methods. Plasticheskie Massy. 2020. No. 7–8. pp. 21–22.
5. Tarodiya R., Gandhi B. K. Experimental investigation of centrifugal slurry pump casing wear handling solid-liquid mixtures. Wear. 2019. Vol. 434–435. pp. 1–11.
6. Messa G. V., Mandelli S., Malavasi S. Hydro-abrasive erosion in Pelton turbine injectors: A numerical study. Renewable Energy. 2019. Vol. 130. pp. 474–488.
7. Grdic Z. J., Curcic G. A. T., Ristic N. S., Despotovic I. M. Abrasion resistance of concrete micro-reinforced with polypropylene fibers. Construction and Building Materials. 2012. Vol. 27. pp. 305–312.
8. Atroshchenko V. A., Avksentiev S. Yu., Makharatkin P. N., Trufanova I. S. Experimental hydrotransportation unit for testing material resistance of pipelines and parts of dredging pumps to hydroabrasive wear. Obogashchenie Rud. 2021. No. 3. pp. 39–45. DOI: 10.17580/or.2021.03.07.
9. Avksentiev S. Yu., Serzhan S. L., Trufanova I. S. Determination of parameters of hydraulic tailings beneficiation of iron ore in Kachkanar GOK. Gorny Informatsionno-analiticheskiy Byulleten'. 2018. No. S11. pp. 3–14.
10. Kuskildin R. B., Vatlina A. M. Method of accelerated industrial testing of hydroabrasive wear of polymer coatings of steel pipes. Journal of Physics: Conference Series. 2021. Iss. 1728. DOI: 10.1088/1742-6596/1728/1/012029.
11. Momber A. W. Effects of target material properties on solid particle erosion of geomaterials at different impingement velocities. Wear. 2014. Vol. 319. pp. 69–83.
12. Rezaei F., Sharif F., Sarabi A. A. Experimental evaluation of high solid polyurethane coating in the presence of salt at high temperature. Materials and Corrosion. 2010. Vol. 61, Iss. 8. pp. 681–688.
13. Liu J. H., Wu R. D., Wu A. X., Wang S. Y. Bleeding characteristics and improving mechanism of self-flowing tailings filling slurry with low concentration. Minerals. 2017. Vol. 7, Iss. 8. DOI: 10.3390/min7080131.
14. Philippou M., Kountouriotis Z., Georgiou G. C. Viscoplastic flow development in tubes and channels with wall slip. Journal of Non-newtonian Fluid Mechanics. 2016. Vol. 238. pp. 44–56.
15. Naz M. Y., Sulaiman S. A., Shukrullah S., Ghaffar A., Ibrahim K. A., Abd El-Salam N. M. Development of erosioncorrosion mechanisms for the study of steel surface behavior in a sand slurry. Measurement. 2016. Vol. 106, Iss. 1. pp. 203–210.
16. Desale Girish R., Gandhi Bhupendra K., Jain S. C. Development of correlations for predicting the slurry erosion of ductile materials. Wear. 2008. Vol. 264. pp. 322–330.
17. Habib M. A., Badr H. M., Ben-Mansour R. Erosion rate correlations of a pipe protruded in an abrupt pipe contraction. International Journal of Impact Engineering. 2007. Vol. 34, Iss. 8. pp. 1350–1369.
18. Alexandrov V. I., Serzhan S. L., Kopteva A. V. Effective parameters of tail processing of gold-bearing ore hydrotransport for Verninskaya processing factory. Key Engineering Materials. 2020. Vol. 836. pp. 25–35.
19. Dolganov A. V., Timukhin S. A. Hydroabrasive wear of mine drainage pumps. Moscow: Russian Academy of Natural History, 2016. 180 p.