Profit based grinding controls

The problem of setting the proper controls and/or having several objectives to be met in the implementation of grinding control strategies can be resolved. The design and implementation of a distributed control system for safe operation of a grinding circuit while maximising profit is presented. An optical recovery/throughout target for a desired grind is accomplished by advanced control strategies at the DCS level. A mill load constraint control technique provides stable operation with a substantial increase in throughput, while the desired grind index is maintained by a inferential grind control technique without using a particle size analyser. The integration of crushing/grinding and flotation in the overall design was the key to the success off the project. This synergistic effect was obtained by implementing a computer plant management system in the concentrator. The overall philosophy was to keep the implementation simple while using a new technology creatively.