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Prediction of mill structure behaviour in a tumbling mill
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, Industriell miljö- och processteknik.ORCID-id: 0000-0002-8032-9388
Boliden Mineral AB.
2011 (engelsk)Inngår i: Minerals Engineering, ISSN 0892-6875, E-ISSN 1872-9444, Vol. 24, nr 3-4, s. 236-244Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Computational demands and the lack of detailed experimental verification have limited the value of distinct element method (DEM) modelling approaches in mill simulation studies. This paper presents the results of a study in which the deflection of a lifter bar in a pilot ball mill is measured by an embedded strain gauge sensor and compared to deflections predicted from finite element (FE) simulations. The flexible rubber lifter and the lining in a tumbling mill are modelled with the finite element method (FEM) and the grinding medium is modelled with DEM. The deflection profile obtained from DEM-FE simulation shows a reasonably good correspondence to pilot mill measurements. To study the charge impact on the mill structure two different charges are used in the simulations. The approach is a contribution to the validation of DEM-FE simulations and an introduction to the description of a bendable rubber lifter implemented in a DEM-FEM mill model. It opens up the possibility to predict contact forces for varying mill dimensions and liner combinations. FEM is especially valuable in this case, since there are readily available libraries with material models.

sted, utgiver, år, opplag, sider
2011. Vol. 24, nr 3-4, s. 236-244
HSV kategori
Forskningsprogram
Hållfasthetslära; Mineralteknik
Identifikatorer
URN: urn:nbn:se:ltu:diva-2600DOI: 10.1016/j.mineng.2010.08.012ISI: 000289500400011Scopus ID: 2-s2.0-79952535910Lokal ID: 03bc1720-cca6-11df-a707-000ea68e967bOAI: oai:DiVA.org:ltu-2600DiVA, id: diva2:975453
Merknad
Validerad; 2011; 20100930 (ysko)Tilgjengelig fra: 2016-09-29 Laget: 2016-09-29 Sist oppdatert: 2018-07-10bibliografisk kontrollert

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