A power model for fine grinding HIGmills with castellated rotors

•Mathematical model developed to describe the power draw of fine grinding HIGmill.•Model developed from measurements from both pilot and full-scale HIGmills.•Specifically to suit new castellated grinding rotors. A grinding power model has been developed to predict the power draw of Outotec’s vertica...

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Bibliographic Details
Published in:Minerals engineering 2017-04, Vol.103-104, p.25-32
Main Authors: Heath, Alex, Keikkala, Ville, Paz, Andres, Lehto, Harri
Format: Article
Language:English
Subjects:
Fine grinding
Modelling
Power draw
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Summary:•Mathematical model developed to describe the power draw of fine grinding HIGmill.•Model developed from measurements from both pilot and full-scale HIGmills.•Specifically to suit new castellated grinding rotors. A grinding power model has been developed to predict the power draw of Outotec’s vertical fine grinding mill (HIGmill). The model is based on a combination of laboratory, pilot and full-scale measurements taken over a range of process conditions. The power draw of the mill is influenced by a variety of factors, ranging from simple geometric factors like the grinding disc diameter, spacing and speed to various process factors like the viscosity, density, grinding bead size, fill level and fluidisation velocity. The focus of the model is on scale up to full-scale from laboratory and pilot-scale data, and how to configure the mill for different process scenarios.
ISSN:0892-6875
1872-9444
DOI:10.1016/j.mineng.2016.07.017