1530 XXXI International Mineral Processing Congress 2024 Proceedings/Washington, DC/Sep 29–Oct 3
in addition to having a simple linear correlation with
the DWI. Powell (2007) proposed that a major upgrade
in modeling capability can be achieved by dissecting the
process, which is composed of many interacting processes,
and assembling them into a comprehensive model. The
Geopyörä Index might help the industry one step further
into this scenario by dissecting the current methodology
into a direct way of estimating rock breakage resistance for
application in circuit modeling. The main advantage of this
new metric is the fact that it uses a formula based on direct
measurements, instead of utilizing curve fitting methods
that require a wider range of data to be fitted, and produce
non-unique results—dependent on the fitting approach.
Furthermore, the fact that the GPI is formulated from an
energy metric recorded as a response to breakage, and not
simply an energy input, makes this parameter a differentia-
tor compared to industry standards.
REFERENCES
Bueno, M., Torvela, J., Chandramohan, R., Matus, T.C.,
Liedes, T., Powell, M.S. 2021. The double wheel break-
age test. Minerals Engineering, Volume 168, 106905.
Bueno, M., De Almeida, T., Powell, M. 2023. Extensive
Validation of a New Rock Breakage Test, Minerals,
13(12), 1506.
Chavez, T. 2020. Development of a Methodology and
Validation of the Geopyörä Breakage Test. Master’s
Thesis, University of Oulu, Finland.
Doll, A. 2024. Calculating DWi from a Drop Weight Test
Result. https://www.sagmilling.com/.
Napier-Munn, T., Morrell, S., Morrison, R., Kojovic, T.
1996. Mineral Comminution Circuits: Their Operation
and Optimisation. Julius Kruttschnitt Mineral Research
Centre, Indooroopilly, Australia.
Morrell, S. 2004, Predicting the specific energy of autog-
enous and semi-autogenous mills from small diameter
drill core samples, Minerals Engineering, Volume 17,
Issue 3, 447–451.
Powell, M., Morrison, R. (2007). The future of commi-
nution modelling. International Journal of Mineral
Processing, 84, 228–239.
Torvela, J. 2020. Double Wheel Crusher Prototype.
Master’s Thesis, University of Oulu, Finland.
in addition to having a simple linear correlation with
the DWI. Powell (2007) proposed that a major upgrade
in modeling capability can be achieved by dissecting the
process, which is composed of many interacting processes,
and assembling them into a comprehensive model. The
Geopyörä Index might help the industry one step further
into this scenario by dissecting the current methodology
into a direct way of estimating rock breakage resistance for
application in circuit modeling. The main advantage of this
new metric is the fact that it uses a formula based on direct
measurements, instead of utilizing curve fitting methods
that require a wider range of data to be fitted, and produce
non-unique results—dependent on the fitting approach.
Furthermore, the fact that the GPI is formulated from an
energy metric recorded as a response to breakage, and not
simply an energy input, makes this parameter a differentia-
tor compared to industry standards.
REFERENCES
Bueno, M., Torvela, J., Chandramohan, R., Matus, T.C.,
Liedes, T., Powell, M.S. 2021. The double wheel break-
age test. Minerals Engineering, Volume 168, 106905.
Bueno, M., De Almeida, T., Powell, M. 2023. Extensive
Validation of a New Rock Breakage Test, Minerals,
13(12), 1506.
Chavez, T. 2020. Development of a Methodology and
Validation of the Geopyörä Breakage Test. Master’s
Thesis, University of Oulu, Finland.
Doll, A. 2024. Calculating DWi from a Drop Weight Test
Result. https://www.sagmilling.com/.
Napier-Munn, T., Morrell, S., Morrison, R., Kojovic, T.
1996. Mineral Comminution Circuits: Their Operation
and Optimisation. Julius Kruttschnitt Mineral Research
Centre, Indooroopilly, Australia.
Morrell, S. 2004, Predicting the specific energy of autog-
enous and semi-autogenous mills from small diameter
drill core samples, Minerals Engineering, Volume 17,
Issue 3, 447–451.
Powell, M., Morrison, R. (2007). The future of commi-
nution modelling. International Journal of Mineral
Processing, 84, 228–239.
Torvela, J. 2020. Double Wheel Crusher Prototype.
Master’s Thesis, University of Oulu, Finland.