Benchmarking: Ball Mill Power Draw Models

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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 SAG Model,
kW at input / shell
Nordberg Model,
no density correction
kW at input / shell
Nordberg Model,
density correction
kW at input / shell
Survey 1 3,864 66.7 68.4 38.7 72.0 3,798 / 3,798 3,619 / 3,370 3,894 / 3,626
  • Morrell model predicts 2% high
  • Nordberg model predicts 7% low with no density correction and 0.8% high with density correction.

See details of benchmarking

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%)

See details of benchmarking

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%)

See details of benchmarking

Benchmarking: Ball Mill Power Draw - Collahuasi

  • Villouta, R.M., Collahuasi: After years of operation, Proceedings of the International Autogenous and Semiautogenous Grinding Technology conference (SAG 2001), Vancouver, Canada, Pages I-31 – I-42
DCS Power, kW Speed, %

of critical

Mill filling Morrell Model, kW Nordberg model, kW

(no density correction)

Nordberg model, kW

(density correction)

original 8900 74% 35% v/v 9044 (+1.6%) [deduct 5%] 8183 (-8.8%) [deduct 5%] 8717 (-2.1%)
later 9200 78% 35% v/v 9655 (+4.9%) [deduct 5%] 8890 (-3.5%) [deduct 5%] 9471 (+2.9%)

All power values relative to DCS.

See details of benchmarking

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