Abstract:Aiming at some unsatisfactory properties of the copper flotation process in a domestic plant, such as: unstable froth velocity, high variation of concentrate grade and low recovery, a flotation expert control system was designed, which combines froth image analysis technology, on-line grade analysis technology, PID control and fuzzy logic control technology. The system structure is reasonable, and the logic level is clear. After running for a period, stable froth velocity, decrease of concentrate grade variation and increase of recovery can all be achieved under different raw grade situations. Meanwhile, the dosage of reagents was also reduced obviously. The results showed that the system works well and is worthy of applying and promoting.