Mining Institute, M. K. Ammosov North-Eastern Federal University (Yakutsk, Russia):
Ovchinnikov N. P., Director, Candidate of Engineering Sciences, Associate Professor, np.ovchinnikov@s-vfu.ru

In practice, the difference between the actual and planned costs forthe maintenance of slurry pumps used at concentration and screening plants of Russian diamond mining companies is mainly represented by the costs of purchase and delivery of their new original (OEM) parts. These costs are primarily due to the premature failure of pump components. The impeller is the least reliable or fail-proof element in their design. The main cause for impeller failure is the intense abrasion of its surfaces by mechanical impurities contained in the slurry pumped. The respective comprehensive scientific research has established the critical factors affecting the weighted average service life of pump impellers used by Russian diamond mining companies. A linear regression model has also been designed, allowing to predict the service life of impellers in Russian-made slurry pumps for the processing plants of PJSC ALROSA with a high degree of probability, duly confirmed using the Fisher criterion. The results obtained are of great practical interest as they make it possible to further assess impeller operational durability and to accordingly predict the maintenance costs for the slurry pumps, depending on their specific operation conditions at Russian diamond mining companies.

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