Benchmarking: Santa Rita ball mill model

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.

• Ball mill dimensions 20 ft diameter by 28.4 ft effective grinding length
• Induction motor size 5800 kW (with gearbox and pinion)
• Rubber lining (assume 8 inch effective thickness)
• Ore density: 3.24 kg/L
• Mill speed not given, assumed to be 74.7% critical (13.3 RPM)

	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%)