Benchmarking: Ball Mill Power Draw Models

Benchmarking: Ball Mill Power Draw - Fimiston

• Nelson, M; Valery, W; Morrell, S, Performance Characteristics and Optimisation of the Fimiston (KCGM) SAG Mill Circuit, Page 233 - 248, SAG 1996 Conference, Vancouver, Canada.

Survey	Survey Power, kW at input	Mill speed, %critical	Total load, %v/v	Pulp %solids, w/w	Morrell BM Model, kW at input / shell	Nordberg Model, kW at input / shell
Survey 1	3,864	68.3	38.7	72.0	3,933 / 3,776	3,592 / 3,345

• Morrell model predicts 2% high
• Nordberg model predicts 7% low

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Benchmarking: Ball Mill Power Draw - Meadowbank

• Muteb, P. & Allaire, J., Meadowbank Mine Process Plant Throughput Increase, Proceedings of the Canadian Mineral Processors Annual General Meeting, Ottawa, Canada, January 2013.

	DCS Power, kW	Mill filling	Morrell Model, kW	Nordberg model, kW no density correction	Nordberg model, kW density correction
May 2012	4,341	30.6% v/v	4,765 (+9.3%)	4,426 (+1.9%)	4,753 (+9.5%)

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Benchmarking: Ball Mill Power Draw - 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.
• Faria, E. & Latchireddi, S., Commissioning and Operation of Milling Circuit at Santa Rita Nickel Operation, Paper #137: Proceedings of the International Autogenous Grinding, Semiautogenous Grinding and High Pressure Grinding Roll Technology Conference, Vancouver, Canada, September 2011.

	DCS Power, kW	Mill filling	Morrell Model, kW	Nordberg model, kW (no density correction)	Nordberg model, kW (density correction)
July 2010	5085	27.5% v/v	4979 (-2.1%)	4706 (-8.1%)	5083 (0.0%)

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