University of Oulu

Bueno, M., Torvela, J., Chandramohan, R., Chavez Matus, T., Liedes, T., & Powell, M. (2021). The double wheel breakage test. Minerals Engineering, 168, 106905.

The double wheel breakage test

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Author: Bueno, Marcos1; Torvela, Janne2; Chandramohan, Rajiv3;
Organizations: 1Oulu Mining School, University of Oulu, P.O. Box 3000, FIN-90014 University of Oulu, Finland
2Mechatronics and Machine Diagnostics, University of Oulu, P.O. Box 3000, FIN-90014 University of Oulu, Finland
3Ausenco, 855 Homer St, Vancouver, BC V6B 2W2, Canada
4JKMRC, University of Queensland, 40 Isles Rd, Indooroopilly, QLD 4068, Australia
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 6.2 MB)
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Language: English
Published: Elsevier, 2021
Publish Date: 2021-06-01


The mining industry needs a low-cost and reliable breakage characterization test which can rapidly process a large number of samples for geometallurgical modelling. The more samples are tested, the better is the understanding of the ore hardness variability and lower the design or production risks. The proposed solution is a new testing device, herein named Geopyörä, which is a variation of a roll crusher with an adjustable gap and instrumentation to measure breakage forces and energy applied to rock particles during the breakage process. The principle utilises a controlled degree of crushing, with absorbed breakage energy being a response rather than an input. The new testing device is capable of rapidly testing rocks over a wide range of sizes and accurately measured energy levels. For a range of ores, the results were demonstrated to provide outputs that replicate the breakage modelling from full JK drop Weight tests. In addition to being suited to testing drill cores and small sample masses, the Geopyörä provides a distribution of particle strengths within every sample. This paper provides an introduction to the concept, development of the prototype device and breakage calibration results that indicate its potential to become a major player in geometallurgical ore testing.

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Series: Minerals engineering
ISSN: 0892-6875
ISSN-E: 1872-9444
ISSN-L: 0892-6875
Volume: 168
Article number: 106905
DOI: 10.1016/j.mineng.2021.106905
Type of Publication: A1 Journal article – refereed
Field of Science: 1171 Geosciences
Funding: This work was supported by the Business Finland public agency for research funding.
Copyright information: © 2021 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (