Abstract
In the process of conveying coarse-grained minerals, the internal flow-through passage components of mining pumps are subject to wear. The flow of coarse particles in such pumps is complex and changes constantly, making it necessary to study the non-steady-state wear characteristics and test the flow passage components. The evolution of the surface wear rate for the flow passage components during one third of a rotation cycle (120°) of a mining pump impeller with small, design, and large flow rates was analyzed in this study based on a discrete phase model (DPM). The flow that occurs during an entire rotation cycle of the impeller was investigated. The wear test was carried out with a small test pump with the same specific speed as and a similar structure to that of the deep-sea mining pump. The test results were compared with the numerical calculation results of the deep-sea mining pump obtained by using the same numerical calculation method and wear model, and the test wear area was found to be more consistent with the numerical calculation wear area. The results show that the numerical calculation method used in this article can more accurately predict the surface wear of the passage components of the mining pump and provides a suitable method for the prediction of the wear characteristics of the mining pump.
Highlights
The wear due to particles on materials is extremely complicated as it is affected by the particle size, density, concentration, and impact angle and different operating conditions
Using a low flow rate (0.68 Qd), the evolution process of the surface wear rate of the impellers and guide vanes was analyzed during one third of a rotation cycle (120◦) of the impellers
Using the design flow rate (1.0 Qd), the evolution process of the surface wear rate of the impellers and guide vanes was analyzed during one third of a rotation cycle (120◦) of Appl
Summary
The wear due to particles on materials is extremely complicated as it is affected by the particle size, density, concentration, and impact angle and different operating conditions. Several researchers have studied the movement characteristics of solid particles in centrifugal pumps from different points of view through experiments while analyzing the influence of the slurry concentration and particle size on the slurry pump head, efficiency, and wear of the flow passage components [21,22,23]. In the study of Su et al [25], the time-dependent flow rate was captured and analyzed in computational fluid domains by Lagrangian and Eulerian viewpoints They showed that starting from the 1–8 section of the volute, the time-averaged velocity decreased overall, and the accuracy of the simulation results was verified using experiments.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
