A power model for fine grinding HIGmills with castellated rotors

Heath, Alex R.; Keikkala, Ville; Paz, Andres; Lehto, Harri

doi:10.1016/j.mineng.2016.07.017

Cited by 10 publications

(2 citation statements)

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“…This motion induces many grinding media contacts, resulting in reduction of the product's particle size. The interest in stirred media mills is reflected in a growing body of research, with recent contributions such as [6][7][8][9][10]. Despite the industrial importance, comminution in stirred media mills is a technology that is still poorly understood.…”

Section: Introductionmentioning

confidence: 99%

A Novel Particle-Based Approach for Modeling a Wet Vertical Stirred Media Mill

et al. 2021

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Modeling of wet stirred media mill processes is challenging since it requires the simultaneous modeling of the complex multiphysics in the interactions between grinding media, the moving internal agitator elements, and the grinding fluid. In the present study, a multiphysics model of an HIG5 pilot vertical stirred media mill with a nominal power of 7.5 kW is developed. The model is based on a particle-based coupled solver approach, where the grinding fluid is modeled with the particle finite element method (PFEM), the grinding media are modeled with the discrete element method (DEM), and the mill structure is modeled with the finite element method (FEM). The interactions between the different constituents are treated by loose (or weak) two-way couplings between the PFEM, DEM, and FEM models. Both water and a mineral slurry are used as grinding fluids, and they are modeled as Newtonian and non-Newtonian fluids, respectively. In the present work, a novel approach for transferring forces between grinding fluid and grinding media based on the Reynolds number is implemented. This force transfer is realized by specifying the drag coefficient as a function of the Reynolds number. The stirred media mill model is used to predict the mill power consumption, dynamics of both grinding fluid and grinding media, interparticle contacts of the grinding media, and the wear development on the mill structure. The numerical results obtained within the present study show good agreement with experimental measurements.

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Section: Introductionmentioning

confidence: 99%

A Novel Particle-Based Approach for Modeling a Wet Vertical Stirred Media Mill

et al. 2021

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“…With a wet operating stirred media mill finer particles can be produced (Sakthivel and Prasanna Venkatesh, 2012). The many applications of micro-and nano-particles is reflected by a growing body of research on the operation of wet stirred media mills, with recent contributions such as Ohenoja and Illikainen (2015), Breitung-Faes (2017), Heath et al (2017), Flach et al (2018). In principle, the operation of a wet stirred media mill consists of the pumping of a slurry through a grinding chamber.…”

Section: Introductionmentioning

confidence: 99%