Optimizing Grinding Circuits

CIM Edmonton 2004
Gail Powley, Sam Crisafulli,
Abstract Engineers at BHP Billiton in conjunction with Matrikon, used ProcessACT to develop a flexible, nonlinear dynamic simulator for a grinding circuit to further enhance process understanding, controller design and prototyping as well to investigate various optimization strategies.

The model was developed using a combination of first-principles modeling along with input-output dynamic behaviour. Examples of models used include Morrell ‘C’ model for power and charge shoulder/toe angle prediction; Whiten’s mixing model for breakage and hold-up; Nageswararao cyclone model for predicting cut size, slurry recovery and water recovery. The composite model simulates system dynamics starting from the stockpile reclaim system and finishing at the feed for the flotation process
Keywords: Simulation, Optimization, Grinding circuit, Flotation, Advanced Applications
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