Optical Inspection Systems for Axisymmetric Parts with Spatial 2D Resolution

Kulchitskiy, A. A.

doi:10.3390/sym13071218

Cited by 4 publications

(3 citation statements)

References 20 publications

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“…The more precise determination of the grinding process parameters (for example, the weight sensor or sensor for precise measurement of toe position [60]) will, in turn, allow for the real-time monitoring of the loading to prevent damage to the liners and to improve control and optimize mill operation. This additional parameter can also be used to calculate the total mill and ball load.…”

Section: Discussionmentioning

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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Section: Discussionmentioning

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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“…Obtaining particle samples in production is limited due to the lack of sensors capable of withstanding the high temperature and caustic environment in an uninterrupted measurement mode. However, computer modelling has provided an effective alternative to investigate the process behavior [41] and has also improved the possibility of obtaining synthetic data [42,43] for developing work in predictive process control.…”

Section: Discussionmentioning

confidence: 99%

Modelling of Red-Mud Particle-Solid Distribution in the Feeder Cup of a Thickener Using the Combined CFD-DPM Approach

2022

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The paper evaluates the behavior of a red-mud solid fraction in a thickener feeder cup, aiming to identify the main characteristics of particle distribution in the flocculation zone and to determine the dependencies affecting the further process taking place in the particle-free sedimentation zone in the thickener-thickening unit. This work used mathematical and numerical modeling to study the influence of such parameters as the flow rate of the feed pulp in the thickener, the flow rate of the flocculant, the density of pulp at the inlet to the unit, and the viscosity and temperature of the pulp on the particle-size distribution from under the feeder cup. The results and dependencies obtained are intended to be used as nominal values in the red-mud thickening process performed on a lab-scale unit.

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“…The use of thermal imaging cameras in similar applications proves the validity of this method. However, they have not yet been used for thermal imaging in levitation melting [24].…”

Section: Perspective Areas For the Development Of Levitation Melting ...mentioning

confidence: 99%

The Present Issues of Control Automation for Levitation Metal Melting

Бойков

Payor

2022

Symmetry

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This article is a review of current scientific problems in the field of automation of the electromagnetic levitation melting process control of non-ferrous metals and potential solutions using modern digital technologies. The article describes the technological process of electromagnetic levitation melting as a method of obtaining ultrapure metals and the main problems of the automation of this process taking into account domestic and international experience. Promising approaches to control the position of the melt in the inductor in real time on the basis of vision systems are considered. The main problems and factors preventing the mass introduction of levitation melting in the electromagnetic field to the industry are highlighted. The problem of passing the Curie point by the heated billet and the effect of the billet’s loss of magnetism on the vibrational circuit of the installation and the temperature of the inductor are also considered. The article also reflects key areas of research development in the field of levitation melting, including: optimization of energy costs, stabilization of the position of the melt in the inductor, predictive process control, and scaling of levitation melting units. The concept of a digital twin based on a numerical model as a component of an automatic process control system for the implementation of inductor control and prediction of process parameters of the melt is presented. The possibility of using vision for visual control of the melt position in the inductor based on video images for its further stabilization in the inductor and increasing the accuracy of numerical simulation results by specifying the real geometry of the melt in parallel with the calculation of the model itself is considered.

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Optical Inspection Systems for Axisymmetric Parts with Spatial 2D Resolution

Cited by 4 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

Modelling of Red-Mud Particle-Solid Distribution in the Feeder Cup of a Thickener Using the Combined CFD-DPM Approach

The Present Issues of Control Automation for Levitation Metal Melting

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