Modeling impact fracture of rock by hydraulic hammer pick with regard to its bluntness

Bolobov, V. I.; Chupin, S. A.; Le-Thanh, B.

doi:10.17580/em.2022.01.15

2022

DOI: 10.17580/em.2022.01.15

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Modeling impact fracture of rock by hydraulic hammer pick with regard to its bluntness

V. I. Bolobov¹,

S. A. Chupin²,

B. Le-Thanh³

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Cited by 2 publications

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“…The discrete element method (DEM), which is based on the Lagrangian approach and considers granular materials as a set of individual interacting particles, each of which is governed by physical laws, is actively used for detailed studies of grinding processes [14,34]. The use of this method makes it possible to predict the kinematic, dynamic and energetic behavior of the loaded material, determining such parameters as normal and tangential components of particle collision forces, impact velocity, sliding distances during their interaction, etc.…”

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confidence: 99%

Development MPC for the Grinding Process in SAG Mills Using DEM Investigations on Liner Wear

Beloglazov,

Plaschinsky

2024

Materials

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The rapidly developing mining industry poses the urgent problem of increasing the energy efficiency of the operation of basic equipment, such as semi-autogenous grinding (SAG) mills. For this purpose, a large number of studies have been carried out on the establishment of optimal operating parameters of the mill, the development of the design of lifters, the rational selection of their materials, etc. However, the dependence of operating parameters on the properties of the ore, the design of the linings and the wear of lifters has not been sufficiently studied. This work analyzes the process of grinding rock in SAG mill and the wear of lifters. The discrete element method (DEM) was used to simulate the grinding of apatite-nepheline ore in a mill using different types of linings and determining the process parameters. It was found that the liners operating in cascade mode were subjected to impact-abrasive wear, while the liners with the cascade mode of operation were subjected predominantly to abrasive wear. At the same time, the results showed an average 40–50% reduction in linear wear. On the basis of modelling results, the service life of lifters was calculated. It is concluded that the Archard model makes it possible to reproduce with sufficient accuracy the wear processes occurring in the mills, taking into account the physical and mechanical properties of the specified materials. The control system design for the grinding process for SAG mills with the use of modern variable frequency drives (VFD) was developed. With the use of the proposed approach, the model predictive control (MPC) was developed to provide recommendations for controlling the optimum speed of the mill drum rotation.

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confidence: 99%

Development MPC for the Grinding Process in SAG Mills Using DEM Investigations on Liner Wear

Beloglazov,

Plaschinsky

2024

Materials

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Remote Impact Frequency Control of Air Hammers with Power Closure of Elastic Valve

Тищенко

Червов

2023

J Min Sci

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Modeling impact fracture of rock by hydraulic hammer pick with regard to its bluntness

Cited by 2 publications

References 20 publications

Development MPC for the Grinding Process in SAG Mills Using DEM Investigations on Liner Wear

Development MPC for the Grinding Process in SAG Mills Using DEM Investigations on Liner Wear

Remote Impact Frequency Control of Air Hammers with Power Closure of Elastic Valve

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