St. Petersburg Mining University (St. Petersburg, Russia):

Aleksandrov V. I., Professor, Doctor of Engineering Sciences, victalex@mail.ru
Atroshchenko V. A., Postgraduate Student, vik3137@yandex.ru
Vatlina A. M., Postgraduate Student

The research focuses on the hydrotransport system for iron ore processing tailings of the Kachkanarsky GOK. Its aim was to establish the actual pressure losses in the hydrotransport system for iron ore processing tailings comprised of steel and polyurethane-lined slurry pipelines, to substantiate the preferred use of polyurethanelined slurry lines, and to develop practical recommendations for the facility. The respective industrial studies of the hydrotransport parameters for tail slurries were carried out using instrumental methods of direct pressure measurements in respective measuring sections of the slurry pipelines and mathematical statistics-based data processing methods. Using the major design, industrial, technical and operational characteristics, it has been confirmed that the use of internal polyurethane lining significantly reduces the specific head losses in hydraulic transportation of thickened iron ore processing tail slurries. The respective feasibility calculations confirm the economic efficiency of steel pipes with internal polyurethane lining in hydrotransport pipelines. The results of the studies are reflected in the reconstruction and development design for the tailings facility of the Kachkanarsky GOK. A transition to polyurethane-lined slurry pipelines will ensure energy saving in the hydrotransport process.

1. Aleksandrov V. I., Kibirev V. I. The Kachkanarsky MCC iron ore processing tailings slurry hydraulic transport parameters determination. Obogashchenie Rud. 2018. No. 1. pp. 56–63. DOI: 10.17580/or.2018.01.10.
2. 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.
3. Aleksandrov V. I., Kibirev V. I. Estimation of efficiency of hydrotransport pipelines polyurethane coating application in comparison with steel pipelines. Obogashchenie Rud. 2016. No. 6. pp. 51–57. DOI: 10.17580/or.2016.06.09.
4. Antoyev K. P., Popov S. N. Investigation of resistance to waterjet wear of fiberglass pipes with polyurethane coating. Nauka i Obrazovanie. 2017. No. 1. pp. 87–90.
5. Dyakonov A. A., Sokolova M. D., Shadrinov N. V., Okhlopkova A. A. Two-layer composite material based on elastomers and ultrahigh molecular weight polyethylene. Proc. of the VIII Eurasian symposium on the problems of strength of materials and machines for cold climate regions EURASTRENCOLD–2018. Yakutsk, 03-07 July 2018. pp. 152–157.
6. Kopchevnikov V. G. Mechanisms of elastomer wear by direct impact of abrasive particles. Trenie i Iznos. 2016. No. 1. pp. 70–75.
7. Magerstaedt M., Raeth T., Lai L., Plourde D., Rosenbleck-Schmidt H. Ten fold life extension of hydrotransport and tailings lines by internal coatings. Corrosion: Proc. of conference. 2016, 6–10 March. Vancouver, Canada. Vol. 6. pp. 4919–4933.
8. Martines C., Briones F., Villarroel V., Vera R. Effect of atmospheric corrosion of the mechanical properties of SAE 1020 structural steel. Materials. 2018. Vol. 11. DOI: 10.3390/ma11040591.
9. Ladan M., Basirun W. J., Kazi S. N., Rahman F. A. Corrosion protection of AISI 1018 steel using Co-doped TiO2/polypyrrole nanocomposites in 3.5 % NaCl solution. Materials Chemistry and Physics. 2017. Vol. 192. pp. 361–373.
10. Doley S., Dolui S. K. Solvent and catalyst free synthesis of sunflower oil based polyurethane through nonisocyanate route and its coatings properties. European Polymer Journal. 2018. Vol. 102. pp. 161–168.
11. Alagi P., Ghorpade R., Choi Y., Patil U., Kim I., Baik J., et al. Carbon dioxide–based polyols as sustainable feedstock of thermoplastic polyurethane for corrosion-resistant metal coating. ACS Sustainable Chemistry and Engineering. 2017. Vol. 5. pp. 3871–3881.
12. Adamu A. A., Sarih N. M., Gan S. N. Thermal and anticorrosion properties of polyurethane coatings derived from recycled polyethylene terephthalate and palm oleinbased polyols. Royal Society Open Science. 2021. Vol. 8, Iss. 4. DOI: 10.1098/rsos.201087.