Evolution of a generic, dynamic and multicomponent tumbling mill model structure incorporating a wide-range 4D appearance function

This work aims to build a generic dynamic model structure, which can accommodate interchangeable sub-models of each sub-process, making it amenable to continuous upgrade without the need for redevelopment, for multicomponent tumbling grinding mills. The Generic Tumbling Mill Model Structure (GTMMS)...

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Bibliographic Details
Published in:Powder technology 2018-11, Vol.339, p.396-407
Main Authors: Yu, P., Xie, W., Liu, L.X., Hilden, M.M., Powell, M.S.
Format: Article
Language:English
Subjects:
4D appearance function
Breakage
Comminution
DEM
Discrete element method
Dynamic
Dynamic models
Energy consumption
Energy distribution
Energy splitting
Generic mill model
Grinding
Grinding mills
Mass balance
Model testing
Multicomponent ore
Probability distribution
Redevelopment
Stiffness
Tumbling
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Summary:This work aims to build a generic dynamic model structure, which can accommodate interchangeable sub-models of each sub-process, making it amenable to continuous upgrade without the need for redevelopment, for multicomponent tumbling grinding mills. The Generic Tumbling Mill Model Structure (GTMMS) is based on a population mass balance framework which incorporates breakage characteristics, transport, classification along the mill, a discharge function, and energy consumption incorporated in a dynamic mill model structure. Version III builds on two earlier versions by incorporating energy distributions derived from discrete element modelling, an updated version of the 4D breakage appearance function which applies to a broader size range, and addresses multi-component ore breakage via the probability distribution of energy split based on material stiffness. The model has been tested against multi-component plant survey data. GTMMS III suggests a mechanistic insight into mixture prediction through component analysis and is a step forward towards the unified comminution model (UCM) with its mechanistic, generic, and dynamic prediction capability. [Display omitted] •A generic Tumbling Mill Model Structure (GTMMS) Version III for multicomponent ore is developed.•Both the 4D appearance function and DEM energy distribution model are incorporated into GTMMS III.•Multicomponent ore can be treated as a blend or each component is dealt with separately with interactions.•GTMMS III agrees well with plant survey data and is a step forward toward mechanistic modelling.
ISSN:0032-5910
1873-328X
DOI:10.1016/j.powtec.2018.08.016