Optimisation has two distinct applications in the concentrator_x000D_
the first is in the area of the flowsheet and the operating parameters of the various unit operations_x000D_
the second is associated with the higher levels of process control. The Plant Metallurgist is faced with a library of complex theories relating to optimisation. The practical reality of optimisation lies in a combination of steady state simulation to ensure that the process route will permit maximum productivity and an appropriate process control system which will permit achievement of the production and quality objectives.