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Validation of tumbling mill charge induced torque as predicted by simulations
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, Sustainable Process Engineering.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Sustainable Process Engineering.ORCID iD: 0000-0002-8032-9388
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Mechanics of Solid Materials.ORCID iD: 0000-0002-7514-0513
2013 (English)In: Minerals & metallurgical processing, ISSN 0747-9182, Vol. 30, no 4, p. 220-225Article in journal (Refereed) Published
Abstract [en]

Understanding mill charge motion is important. In the charge, the center of gravity is shifted from the rotational center of the mill system, and its motion is induced by rotation of the mill, while at the same time the charge creates a torque into the mill system. Breakage of ore particles and wear of liners/ball media are closely linked to this motion. To study these phenomena in a physically correct manner, numerical models for different parts of the mill system are needed. Validations of such models are scarce, because of the difficulty to measure inside a tumbling mill.Experimental measurements in a lab mill were done for a number of load cases: varying feed material, mill filling, mill speed and pulp liquid. The mill is set up to measure the charge-induced torque. The accuracy is good with relative uncertainty smaller than ±2% for relevant load cases.A full three dimensional numerical model of the whole mill is used to predict induced torque. Agreement between predicted and measured torque at steady-state is good. In addition, the model can accurately predict the mill start-up behavior for torque and mill power. This proves that the model is physically correct, and can be used for modeling large-scale mills.

Place, publisher, year, edition, pages
2013. Vol. 30, no 4, p. 220-225
National Category
Applied Mechanics Metallurgy and Metallic Materials
Research subject
Solid Mechanics; Mineral Processing
Identifiers
URN: urn:nbn:se:ltu:diva-6583Local ID: 4d59c6f0-c0a7-42cd-bc73-6427c809c435OAI: oai:DiVA.org:ltu-6583DiVA, id: diva2:979469
Note
Validerad; 2013; 20131105 (parj)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-04-12Bibliographically approved

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http://www.smenet.org/minerals-and-metallurgical-processing-journal/abstract.cfm?aid=4216

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Jonsén, PärStener, JanPålsson, BertilHäggblad, Hans-Åke

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