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A novel method for modelling of interactions between pulp, charge and mill structure in tumbling mills
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Mechanics of Solid Materials.ORCID iD: 0000-0003-0910-7990
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Minerals and Metallurgical Engineering.ORCID iD: 0000-0002-8032-9388
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Mechanics of Solid Materials.ORCID iD: 0000-0002-7514-0513
2014 (English)In: Minerals Engineering, ISSN 0892-6875, E-ISSN 1872-9444, Vol. 63, p. 65-72Article in journal (Refereed) Published
Abstract [en]

Modelling the pulp fluid and its interaction with both the charge and the mill structure is an interesting challenge. The interaction is normally modelled with a combination of CFD and DEM, where the DEM particles (grinding balls) create the structure through which the fluid penetrates, and in its turn creates forces on the grinding balls. However, in a tumbling mill, many free surfaces are found and that limits the use of CFD. An alternative computational approach is here necessary.The smoothed particle hydrodynamic (SPH) method has earlier been used to model a ball charge and its interaction with the mill structure. In the present contribution, a SPH description of the pulp fluid is introduced. The lifters and the lining are still modelled with the finite element method (FEM), and the grinding balls with DEM. This combined computational model makes it possible to predict pressure within the pulp fluid. It is also possible to predict how the dampening effect of the pulp liquid is affected by its viscosity and density. The charge induced torque in a laboratory-scale ball mill is used for validation, and the mechanical shock waves travelling in the mill system are described

Place, publisher, year, edition, pages
2014. Vol. 63, p. 65-72
National Category
Applied Mechanics Metallurgy and Metallic Materials
Research subject
Solid Mechanics; Mineral Processing
Identifiers
URN: urn:nbn:se:ltu:diva-31752DOI: 10.1016/j.mineng.2013.12.005ISI: 000337880500008Scopus ID: 2-s2.0-84901587114Local ID: 60419b72-8272-41b6-bac1-0d9a012e69a6OAI: oai:DiVA.org:ltu-31752DiVA, id: diva2:1004986
Conference
Conference on Computational Modelling Location : 18/06/2013 - 19/06/2013
Note
Validerad; 2014; 20131227 (ysko); Konferensartikel i tidskriftAvailable from: 2016-09-30 Created: 2016-09-30 Last updated: 2018-07-10Bibliographically approved

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Jonsén, PärPålsson, BertilStener, JanHäggblad, Hans-Åke

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Mechanics of Solid MaterialsMinerals and Metallurgical EngineeringDepartment of Civil, Environmental and Natural Resources Engineering
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Minerals Engineering
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