stirred mill discrete element modelling 2012

Sucessful Case

Read More
  • Discrete element method computational fluid dynamics

    Stirred mills are increasingly used in the mineral industry for a range of milling duties from fine to coarse grinding. This work investigated the particle and fluid flow in a stirred mill using a combined discrete element method (DEM) and computational fluid dynamics (CFD) approach.

  • Author: C. Jayasundara, R. Yang, B. Guo, A. Yu, J. Rubenstein
  • A novel approach for modelling of physical interactions

    The grinding media is modelled using the discrete element method (DEM) and the mill structure is modelled using the finite element method (FEM). The interactions between slurry, grinding media and mill structure are modelled by two-way couplings between the PFEM, the DEM and the FEM models.

  • Optimum design of agitator geometry for a dry stirred

    Mar 01, 2021· Three different agitator geometries for a dry stirred media mill with a horizontal drum were studied experimentally and by DEM (discrete element method) simulation. Two optimized models, model A with stirring arms oriented in the same direction and model B with inclined stirring arms, achieved more rapid grinding with the lower adhesion of

  • Author: Chiharu Tokoro, Yuki Ishii, Yuki Tsunazawa, Yuki Tsunazawa, Xin Jiang, Kyoko Okuyama, Motonori Iwamo.
  • Simulation of Stress Energy and Grinding Media Movement

    Oct 09, 2012· Grinding is an important process in the mineral, chemical and pharmaceutical industries. In the last couple of years, the discrete element method (DEM) has become more and more important for modeling different grinding processes and for the calculation of

  • Mechanistic modeling and simulation of a batch vertical

    Sep 01, 2020· The present work takes advantage of a mechanistic mill model originally developed for ball mills and the discrete element method (DEM) to simulate breakage in a vertical stirred mill. Data from a batch mill, in which two materials were tested (copper ore and limestone), served as the basis for fitting selected material parameters, whereas the

  • Cited by: 5
  • Mechanistic modeling and simulation of a batch vertical

    Mill power has then been predicted using the discrete element method and deviations smaller than 3.5% were found between predictions and measurements. On the basis of these, the model has demonstrated to provide valid predictions from comparisons to size distributions at a fixed grinding time for different stirred speeds and percentages of solids.

  • Cited by: 5
  • Special Issue "Simulation Using the Discrete Element

    A discrete element method (DEM) simulation scheme is conducted to look at how ball size distribution, mill filling, end-liner configuration and shape affect the distribution of forces acting on the liners that were assessed to understand end-liner wear and damage.

  • From discrete element simulations to a continuum model

    Nov 09, 2001· The first important quantity to measure is the volume fraction (2) ν=ν(r)= 1 V ∑ p∈V w p V V p, obtained by using Q p =1 and disregarding the sum over the contacts. ν is related to the mass density via ρ(r)=ρ p ν, with the material's density ρ p =1060 kg m −3, paralleling the experiments,,,.The next quantity of interest is the mean particle flux (3) νv φ = 1 V ∑ p∈V w p

  • Investigating grinding media dynamics inside a vertical

    Mar 15, 2020· Discrete element model for an attritor mill with impeller responding to interactions with milling balls Chem. Eng. Sci.,101 ( 2013 ),pp. 366 373,10.1016/j.ces.2013.06.048 Article Download PDF View Record in Scopus Google Scholar

  • Cited by: 6
  • Discrete element method Wikipedia

    A discrete element method (DEM), also called a distinct element method, is any of a family of numerical methods for computing the motion and effect of a large number of small particles. Though DEM is very closely related to molecular dynamics, the method is generally distinguished by its inclusion of rotational degrees-of-freedom as well as stateful contact and often complicated geometries

  • THE EFFECT OF STIRRED MILL OPERATION ON PARTICLES

    mill are investigated using Discrete Element Modelling (DEM). It is observed that breakage mechanisms are affected by the type of mineral and stress intensities (agitator speed) in the mill. For example, galena, the soft/high density mineral, reaches its

  • Discrete Particle Simulation of Particle Flow in the

    Jul 28, 2006· IsaMill is a high-speed stirred mill that has been newly developed in the mineral industry for fine and ultrafine grinding. In this paper, a numerical model that is based on the discrete element method (DEM) was developed to study particle flow in a simplified IsaMill. The DEM model was validated by comparing the simulated results of the flow pattern, mixing pattern, and power draw with

  • Simulation of Stress Energy and Grinding Media Movement

    Oct 09, 2012· Grinding is an important process in the mineral, chemical and pharmaceutical industries. In the last couple of years, the discrete element method (DEM) has become more and more important for modeling different grinding processes and for the calculation of

  • Mechanistic modeling and simulation of a batch vertical

    Mill power has then been predicted using the discrete element method and deviations smaller than 3.5% were found between predictions and measurements. On the basis of these, the model has demonstrated to provide valid predictions from comparisons to size distributions at a fixed grinding time for different stirred speeds and percentages of solids.

  • Investigating grinding media dynamics inside a vertical

    Abstract In this work the grinding media motion inside a vertical stirred mill was investigated using the Discrete Element Method (DEM) and the results were qualitatively compared against similar conditions from published literature. Two impeller designs having different arm length were investigated as function of low and high rotational speeds (50 rpm and 250 rpm).

  • Shear based stirred mill power model An adimensional

    Stirred mill power has been modelled empirically, adimensionally and computational intensively through the use of the discrete element method and computational fluid dynamics. To this range of power modelling efforts, one more is added through the development of a shear based power for stirred

  • (41d) Dynamics and Energetics for a Vertically Stirred

    Dynamics and Energetics for a Vertically Stirred Mill: validation of a Discrete Element Method (DEM) Model via Positron Emission Particle Tracking (PEPT). Domenico Daraio **, Hugh E. Stitt * Alessio Alexiadis **, Andrew Ingram **, and Michele Marigo * * Johnson Matthey Technology Centre Chilton Site Billingham (UK)

  • (PDF) PREDICTIVE MODELLING OF VERTICAL STIRRED MILLS

    Mill A presents a distributed spectrum, with average peaks all over the frequency band. Mill B, with average lifetime, presents less number of peaks under 60 Hz but with higher amplitudes. Above 60 Hz, it presents very few amounts of energy. Mill C, ending liner

  • Computational Modelling ‘17

    11.40 Numerical analysis of vertical stirred mills scale-up using discrete element method D.B. Mazzinghy, R.M. Carvalho, V.A. Rodriguez, L.M. Tavares, C.E. Teixeira Jr., R. Galéry, (Universidade Federal de Minas Gerais and Universidade Federal do Rio de Janeiro, Brazil) 12.00 Attritor mill-

  • Minerals Engineering Conferences Computational Modelling '17

    Numerical analysis of vertical stirred mills scale-up using discrete element method D.B. Mazzinghy, R.M. Carvalho, V.A. Rodriguez, L.M. Tavares, C.E. Teixeira Jr., R. Galéry, (Universidade Federal de Minas Gerais and Universidade Federal do Rio de Janeiro, Brazil) Attritor mill- grinding media dynamics

  • Investigating the Grinding Media Behavior in Dry-Stirred

    Apply discrete element modeling to identify the impacts of process and product parameters on bead motion. DEM simulation — which investigated bead contact frequency, collision energy and computed power draw of the mill — correlated well with experimental findings.

  • DYNAMICS AND ENERGETICS OF A VERTICALLY STIRRED

    DYNAMICS AND ENERGETICS OF A VERTICALLY STIRRED MILL: A VALIDATED DISCRETE ELEMENT METHOD (DEM) MODEL VIA POSITRON EMISSION PARTICLE TRACKING (PEPT). D. Daraio1,2, J. Villoria3, A. Ingram2,A. Alexiadis2, H. Stitt1 and M. Marigo1 1 Johnson Matthey Technology Centre Chilton Site Billingham (UK)

  • A novel approach for modelling of physical interactions

    Modelling of wet comminution in stirred media mills requires the simultaneous modelling of grinding media, a moving internal stirrer, and slurry. In the present study, a novel approach for modelling the physical interactions between slurry, grinding media and mill structure in a stirred media mill

  • Assessing the stirred mill design space CEEC (Coalition

    Emphasis in recent years has been on the use of computationally intensive modeling and simulation methods such as the discrete element method (DEM) and computational fluid dynamics (CFDs). However, due to the computational requirements of these two methods, initiating a study that spans the stirred mill design space would take a lot of

  • THE EFFECT OF STIRRED MILL OPERATION ON PARTICLES

    mill are investigated using Discrete Element Modelling (DEM). It is observed that breakage mechanisms are affected by the type of mineral and stress intensities (agitator speed) in the mill. For example, galena, the soft/high density mineral, reaches its

  • (41d) Dynamics and Energetics for a Vertically Stirred

    Dynamics and Energetics for a Vertically Stirred Mill: validation of a Discrete Element Method (DEM) Model via Positron Emission Particle Tracking (PEPT). Domenico Daraio **, Hugh E. Stitt * Alessio Alexiadis **, Andrew Ingram **, and Michele Marigo * * Johnson Matthey Technology Centre Chilton Site Billingham (UK)

  • Shear based stirred mill power model An adimensional

    Stirred mill power has been modelled empirically, adimensionally and computational intensively through the use of the discrete element method and computational fluid dynamics. To this range of power modelling efforts, one more is added through the development of a shear based power for stirred

  • DYNAMICS AND ENERGETICS OF A VERTICALLY STIRRED

    DYNAMICS AND ENERGETICS OF A VERTICALLY STIRRED MILL: A VALIDATED DISCRETE ELEMENT METHOD (DEM) MODEL VIA POSITRON EMISSION PARTICLE TRACKING (PEPT). D. Daraio1,2, J. Villoria3, A. Ingram2,A. Alexiadis2, H. Stitt1 and M. Marigo1 1 Johnson Matthey Technology Centre Chilton Site Billingham (UK)

  • Assessing the stirred mill design space CEEC (Coalition

    Emphasis in recent years has been on the use of computationally intensive modeling and simulation methods such as the discrete element method (DEM) and computational fluid dynamics (CFDs). However, due to the computational requirements of these two methods, initiating a study that spans the stirred mill design space would take a lot of

  • Mechanistic modeling and simulation of a batch vertical

    Mill power has then been predicted using the discrete element method and deviations smaller than 3.5% were found between predictions and measurements. On the basis of these, the model has demonstrated to provide valid predictions from comparisons to size distributions at a fixed grinding time for different stirred speeds and percentages of solids.

  • (PDF) PREDICTIVE MODELLING OF VERTICAL STIRRED MILLS

    Mill A presents a distributed spectrum, with average peaks all over the frequency band. Mill B, with average lifetime, presents less number of peaks under 60 Hz but with higher amplitudes. Above 60 Hz, it presents very few amounts of energy. Mill C, ending liner

  • Particle Methods for Modelling DiVA portal

    ow. The numerical models are validated against experimental results, such as in-plane velocity eld measurements. In paper E, coupled nite element, DEM and PFEM models are used to model the physical interactions of grinding media, slurry and mill structure and in a stirred media mill. The ndings in the present thesis support the

  • Computational Modelling ‘17

    11.40 Numerical analysis of vertical stirred mills scale-up using discrete element method D.B. Mazzinghy, R.M. Carvalho, V.A. Rodriguez, L.M. Tavares, C.E. Teixeira Jr., R. Galéry, (Universidade Federal de Minas Gerais and Universidade Federal do Rio de Janeiro, Brazil) 12.00 Attritor mill-

  • Minerals Engineering Conferences Computational Modelling '17

    Numerical analysis of vertical stirred mills scale-up using discrete element method D.B. Mazzinghy, R.M. Carvalho, V.A. Rodriguez, L.M. Tavares, C.E. Teixeira Jr., R. Galéry, (Universidade Federal de Minas Gerais and Universidade Federal do Rio de Janeiro, Brazil) Attritor mill- grinding media dynamics

  • DEM simulation and analysis of operating parameters on

    DEM (Discrete Element Method) is a powerful tool in predicting particle behaviour, which is ideal for the study of stirred media milling. The CFD (Computational Fluid Dynamics) is used to model the motion of slurry by numerically solving the Navier–Stokes equations facilitated with the Volume of Fluid (VOF) and multiphase flow models.

  • ‪Michele Marigo‬ ‪Google Scholar‬

    Investigating grinding media dynamics inside a vertical stirred mill using the discrete element method: Effect of impeller arm length D Daraio, J Villoria, A Ingram, A Alexiadis, EH Stitt, M Marigo Powder Technology 364, 1049-1061,2020

  • Mechanistic Modeling of Wet Stirred Media Milling for

    Nov 22, 2020· Modeling of Two-Phase Flow in WSMM: CFD, DEM, and Their Coupling. In a stirred mill, drug particles and beads suspended in an aqueous solution of stabilizers are stirred by a rotor (refer to Fig. 1).As drug particles are typically orders of magnitude smaller than the beads, the drug suspension has been exclusively treated as a single, equivalent liquid phase with Newtonian behavior,

  • CFD‐Discrete Element Method Simulations Combined with

    Micromechanical aggregate properties are correlated with stress conditions during the dispersion process in a stirred‐media mill. The fracture energy distribution of the aggregates measured via micro‐compression tests is compared with the stress energy distribution in a stirred‐media mill determined by CFD‐discrete element method simulations and by an analytical model.