The parameters of a detailed phenomenological flotation model for the rougher flotation bank have been evaluated performing large steady state sampling in the plant. The dynamic model has been used in simulation of the operation of a rougher flotation bank, as a step in development of expert control of a larger flotation system. The simulator has been interfaced with the ONSPEC control software package run in the IBM DOS environment, the software for flotation circuit simulation and expert control system design is described. The control strategy tested by simulation aims to maximize the recovery, while the concentrate grade is maintained above a given minimum level. The determination of the manipulated variables hierarchy of the bank is described and the simulated results of expert control are presented.