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Preliminary validation of a new way to model physical 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 teknikvetenskap och matematik, Material- och solidmekanik.ORCID-id: 0000-0001-7895-1058
Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Mineralteknik och metallurgi.ORCID-id: 0000-0002-8032-9388
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Material- och solidmekanik.ORCID-id: 0000-0002-4634-4373
2019 (engelsk)Inngår i: Minerals Engineering, ISSN 0892-6875, E-ISSN 1872-9444, Vol. 130, s. 76-84Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Modelling of wet grinding in tumbling mills is an interesting challenge. A key factor is that the pulp fluid and its simultaneous interactions with both the charge and the mill structure have to be handled in a computationally efficient way. In this work, the pulp fluid is modelled with a Lagrange based method based on the particle finite element method (PFEM) that gives the opportunity to model free surface flow. This method gives robustness and stability to the fluid model and is efficient as it gives possibility to use larger time steps. The PFEM solver can be coupled to other solvers as in this case both the finite element method (FEM) solver for the mill structure and the DEM solver for the ball charge. The combined PFEM-DEM-FEM model presented here can predict charge motion and responses from the mill structure, as well as the pulp liquid flow and pressure. All cases presented here are numerically modelled and validated against experimentally measured driving torque signatures from an instrumented small-scale batch ball mill equipped with a torque meter and charge movements captured from high-speed video. Numerical results are in good agreement with experimental torque measurements and the PFEM solver also improves on efficiency and robustness for solving charge movements in wet tumbling mill systems.

sted, utgiver, år, opplag, sider
Elsevier, 2019. Vol. 130, s. 76-84
Emneord [en]
Grinding, Modelling, Simulation, Validation
HSV kategori
Forskningsprogram
Hållfasthetslära; Mineralteknik
Identifikatorer
URN: urn:nbn:se:ltu:diva-71226DOI: 10.1016/j.mineng.2018.10.013ISI: 000452937000010Scopus ID: 2-s2.0-85054850385OAI: oai:DiVA.org:ltu-71226DiVA, id: diva2:1256382
Merknad

Validerad;2018;Nivå 2;2018-10-16 (svasva)

Tilgjengelig fra: 2018-10-16 Laget: 2018-10-16 Sist oppdatert: 2019-02-01bibliografisk kontrollert

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Jonsén, PärHammarberg, SamuelPålsson, BertilLindkvist, Göran

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