Ep06 - Ball mill power draw models
Channel: Alex Doll
Date: 2022-03-22

Mill power draw models can be used for designing and troubleshooting ball mill applications.  This video describes four commonly used power draw models for wet overflow mills: models by Bond, Nordberg, Hogg & Fuerestenau, and Morrell's C-model.  Three case studies are interpreted where a mill survey is compared to the model predictions.

Sources:
1. Ball Mill diagram: https://en.wikipedia.org/wiki/Ball_mill

2. Tower mill diagram: Palaiandy, Yahyaei, & Ishikawa, IMPROVING SINGLE-STAGE SAG CIRCUIT EFFICIENCY AND PRODUCT QUALITY THROUGH FINISH GRINDING IN THE TOWERMILL, SAG 2019 Conference, Vancouver, Canada, September 2019

3. Meadowbank: Muteb, P. & Allaire, J., Meadowbank Mine Process Plant Throughput Increase, Proceedings of the CMP, Ottawa, Canada, January 2013

4. Santa Rita: Latchireddi, S. & Faria, E., Achievement of High Energy Efficiency in Grinding Mills at Santa Rita, Proceedings of the Canadian Mineral Processors Annual General Meeting, Ottawa, Canada, January 2013.
Santa Rita: Faria, E. & Latchireddi, S., Commissioning and Operation of Milling Circuit at Santa Rita Nickel Operation, Paper #137: Proceedings of SAG Conference 2011, Vancouver, Canada, September 2011.

5. Fimiston: Nelson, M; Valery, W; Morrell, S, Performance Characteristics and Optimisation of the Fimiston (KCGM) SAG Mill Circuit, Page 233 - 248, SAG 1996 Conference
Bond power model: Advances in Comminution, S. Komar Kawatra (ed), SME 2006 ISBN: *978-0-87335-246-8

6. Nordberg model: The Science of Comminution, Outokumpu (now Metso:Outotec), undated but probably from about 2002

7. Hogg & Fuerstenau model: MolyCop Tools ver 3.01 (J. Sepúlveda et al)

8. Hogg & Fuerstenau model: Hogg, R., & Fuerstenau, D.W. (1972) Power Relationships for Tumbling Mills, Transactions AIME, Vol 253, Pp 418-423

9. Morrell C-model: Napier-Munn, T.J., Morrell, S., Morrison, R.D. & Kojovic, T. (1996) Mineral Comminution Circuits; Their Operation and Optimisation (pp. 251–272), Indooroopilly, Queensland, Australia: Julius Kruttschnitt Mineral Research Centre.

Power measurement: https://www.sagmilling.com/articles/1/view/TechMemorandum-MotorPower-Rev6.pdf?s=1