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Simulation Using the Discrete Element Method (DEM) in the Minerals...
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Simulation Using the Discrete Element Method (DEM) in the Minerals Industry, Volume II

A special issue of Minerals (ISSN 2075-163X). This special issue belongs to the section "Mineral Processing and Extractive Metallurgy".

Deadline for manuscript submissions: closed (15 January 2024) | Viewed by 4344

Special Issue Editors

Dr. Rodrigo Magalhães de Carvalho

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Guest Editor
Department of Metallurgical and Materials Engineering, COPPE, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-972, RJ, Brazil
Interests: comminution; discrete element method; modeling and simulation; classification; numerical methods; materials handling; mineral processing
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Luís Marcelo M. Tavares

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Guest Editor
Department of Metallurgical and Materials Engineering, Universidade Federal do Rio de Janeiro-UFRJ, Caixa Postal 68505, Rio de Janeiro CEP 21941-972, RJ, Brazil
Interests: mineral processing; modeling; simulation; comminution; physical concentration; coal preparation; discrete element method; degradation during handling; particle breakage
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The discrete element method (DEM) has proved to be a powerful tool that has allowed and has been opening the black box of operations and mechanisms in several processes in the minerals industry. As this industry deals mostly with particles, DEM can be used with different approaches ranging from machine- or process-focused to particle scale applications, where each of them presents individual challenges. Some of DEM’s applications include simulation of granular materials handling, classification, comminution, agglomeration, and concentration. DEM also can be applied as a coupled tool to other numerical simulation techniques, such as CFD, SPH, MBP, MBD, and FEM.

This Special Issue of Minerals aims to gather the most recent research and application advances using DEM, and its coupled techniques, with direct interest in the minerals industry. We would like to invite researchers in this field to submit your research papers, review papers, and communications related to DEM in the minerals industry.

Prof. Dr. Rodrigo Magalhães de Carvalho
Prof. Dr. Luís Marcelo M. Tavares
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Minerals is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • discrete element method
  • modeling and simulation
  • comminution
  • materials handling
  • classification
  • mineral processing
  • agglomeration
  • concentration
  • beneficiation
  • crushing
  • grinding

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Related Special Issue

Published Papers (2 papers)

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Research

21 pages, 4973 KiB  
Article
Discrete Element Modeling of the Breakage of Single Polyhedral Particles in the Rotary Offset Crusher
by Titus Nghipulile, Mulenga Murray Bwalya, Indresan Govender and Henry Simonsen
Minerals 2024, 14(6), 630; https://doi.org/10.3390/min14060630 - 20 Jun 2024
Cited by 1 | Viewed by 785
Abstract
Innovation in comminution is expected to continue unabated to address the inefficiencies that are inherent in comminution circuits. The rotary offset crusher (ROC) is a new comminution device with a promising performance potential in terms of throughput due to the enhanced speed of [...] Read more.
Innovation in comminution is expected to continue unabated to address the inefficiencies that are inherent in comminution circuits. The rotary offset crusher (ROC) is a new comminution device with a promising performance potential in terms of throughput due to the enhanced speed of transportation induced by the centrifugal force of the discs. However, the processes driving the comminution of particles trapped in the conical space between the two discs of the crusher are not fully understood. To gain a better insight into the comminution process in this device, discrete element modeling (DEM) simulations were conducted to study the breakage of a single particle for the crusher operated under two different dynamic conditions, i.e., (1) a stationary top disc and (2) both discs rotating at the same speed. For both scenarios, the speed of the discs was varied between 550 and 2350 rpm. Experimental testwork was also conducted with the laboratory prototype to generate the data that were used to calibrate the breakage parameters of the Ab × t10 breakage model. Simulations were performed using polyhedral UG2 ore particles that were generated with the in-built particle generator in the DEM simulator. The simulated ROC, which is operated with both discs rotating, outperformed the ROC with a stationary top disc in terms of the specific input energy and throughput. The crusher with a stationary top disc is characterized by high shear forces (suggesting a higher wear rate), specific input energies greater than 1 kWh/t, and low throughputs (<50 kg/h). The ROC operated with a stationary disc is not recommended for hard rock applications due to expected excessive wear of crushing surfaces and higher energy consumption. The freewheeling discs are recommended, but there is scope to optimize the crusher performance in terms of the power draw, size reduction, and throughput by manipulating the difference between the speeds of the discs. There is also scope to optimize the crusher performance when it is simulated with many particles. Once the full performance potential of the ROC is established, it will then be important to benchmark it against the existing crushers in the minerals industry as well as other industries where crushers are used. Full article
(This article belongs to the Special Issue Simulation Using the Discrete Element Method (DEM) in the Minerals Industry, Volume II)
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17 pages, 2093 KiB  
Article
Effect of Particle Shape on Parameter Calibration for a Discrete Element Model for Mining Applications
by Manuel Moncada, Fernando Betancourt, Cristian G. Rodríguez and Patricio Toledo
Minerals 2023, 13(1), 40; https://doi.org/10.3390/min13010040 - 27 Dec 2022
Cited by 14 | Viewed by 2698
Abstract
The discrete element method (DEM) has been widely employed to model processes in different industries, such as mining, agriculture, pharmaceuticals, and food. One of the main lines of research, and in which different authors propose several approaches, is the calibration of parameters. Bulk [...] Read more.
The discrete element method (DEM) has been widely employed to model processes in different industries, such as mining, agriculture, pharmaceuticals, and food. One of the main lines of research, and in which different authors propose several approaches, is the calibration of parameters. Bulk calibration (BCA) is a common approach used that does not necessarily represent the individual behavior of each particle. On the other hand, direct measurement (DMA) is another approach employed in some cases. This work presents a comparison between calibration of DEM model parameters with non-cohesive spherical and polyhedral particles using a combination of direct measurement and bulk calibration. BCA is employed to calibrate friction parameters and DMA to characterize shape of the particles and coefficient of restitution of the contact between particles. Experimental data from Draw Down Tests are used to calibrate the friction parameters. Numerical optimization of the parameters is conducted by altering the coefficients of friction regarding the objective variables of mass flow, final mass, shear angle, and angle of repose. Quartz, granite, and coal are calibrated, obtaining good agreement with the experimental results. The influence of particle shape is tested, proving that more complex particles obtain better results for the analyzed case. Full article
(This article belongs to the Special Issue Simulation Using the Discrete Element Method (DEM) in the Minerals Industry, Volume II)
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