Mill AutoPilot at CSA Mine

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• Mill Auto-Pilot at CSA Mine
• Dieter Engelhardt, Jennifer Woodgate, Andrew
  Thornton, Andrew Schroder

Return to www.mipac.com.au/millautopilot
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Stabilising Control for SAG mill load and power
Flowsheet of the plant being simulated
Plant data inputs to the dynamic simulator models
Output Critical information about the SAG mill
? Input to control
The SAG mill model predicts the position of the
charge toe and shoulder
Models calculate feedrate required to stabilise
load ? Second opinion for the expert system
Ore hardness is model fitted on-line so model
remains calibrated to plant conditions
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Measured and Predicted Power
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Status of MA-P at CSA Cobar

• Commissioned March 2004
• Interfaced to SCADA using OPC protocol
• On-line model of grinding circuit configured
• SAG charge estimator infers mill charge load, toe
  and shoulder angles and radius
• Stabilising control for SAG mill load and power
• Operators trained

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Performance of MA-P at Cobar

• Grinding stability improved
• Less down time for high power draw
• Improved consistency between shifts
• Flotation performance improved
• MA-P proven robust
• Operator acceptance MA-P on SAG 2 ?

Return to www.mipac.com.au/millautopilot