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A novel method for modelling of interactions between pulp, charge and mill structure in tumbling mills
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Material- och solidmekanik.ORCID-id: 0000-0003-0910-7990
Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Mineralteknik och metallurgi.ORCID-id: 0000-0002-8032-9388
Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser.
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Material- och solidmekanik.ORCID-id: 0000-0002-7514-0513
2014 (engelsk)Inngår i: Minerals Engineering, ISSN 0892-6875, E-ISSN 1872-9444, Vol. 63, s. 65-72Artikkel i tidsskrift (Fagfellevurdert) 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

sted, utgiver, år, opplag, sider
2014. Vol. 63, s. 65-72
HSV kategori
Forskningsprogram
Hållfasthetslära; Mineralteknik
Identifikatorer
URN: urn:nbn:se:ltu:diva-31752DOI: 10.1016/j.mineng.2013.12.005ISI: 000337880500008Scopus ID: 2-s2.0-84901587114Lokal ID: 60419b72-8272-41b6-bac1-0d9a012e69a6OAI: oai:DiVA.org:ltu-31752DiVA, id: diva2:1004986
Konferanse
Conference on Computational Modelling Location : 18/06/2013 - 19/06/2013
Merknad
Validerad; 2014; 20131227 (ysko); Konferensartikel i tidskriftTilgjengelig fra: 2016-09-30 Laget: 2016-09-30 Sist oppdatert: 2018-07-10bibliografisk kontrollert

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Jonsén, PärPålsson, BertilStener, JanHäggblad, Hans-Åke

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