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A Comminution Model for Linking Size Reduction with Energy and Mineral Liberation
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Minerals and Metallurgical Engineering.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Minerals and Metallurgical Engineering.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Minerals and Metallurgical Engineering.
2015 (English)Conference paper, Oral presentation only (Refereed)
Abstract [en]

Traditionally comminution models are used to predict size reduction and the energy required for that. For better control of energy and quality of concentrate grade in subsequent concentration processes also the liberation of the minerals has to be considered. Mechanical forces are used to break the bonds of the mineral matrix of composite particle into mineral phases.Mineral composition and texture (i.e. the grain size) have been used to predict the breakage properties of an ore but are not fully used to predict the liberation of mineral particles during comminution. For this purpose an integrated breakage model is needed that links the energy used to reduce the size of the mineral particles with the mineral liberation achieved during comminution. Such a liberation model for forecasting the degree of mineral liberation has to be based on mineral texture information.As a novel approach, a liberability curve for various mineral textures has been developed and used to optimize the particle size and energy required for ore comminution. Tests with iron ore samples from the Malmberget mine in Northern Sweden show that, liberation and breakage of the mineral particles are controlled by the grade distribution and grain size of magnetite.

Place, publisher, year, edition, pages
2015.
National Category
Metallurgy and Metallic Materials
Research subject
Mineral Processing
Identifiers
URN: urn:nbn:se:ltu:diva-31560Local ID: 5c778380-cd85-4baa-b795-2adf662c6dd7OAI: oai:DiVA.org:ltu-31560DiVA, id: diva2:1004794
Conference
European Symposium on Comminution and Classification : 07/09/2015 - 11/09/2015
Note
Godkänd; 2015; 20150914 (abdmwa)Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2017-11-25Bibliographically approved

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Mwanga, AbdulRosenkranz, JanLamberg, Pertti

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CiteExportLink to record
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Citation style
  • apa
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