# 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%) |