2. Flotation Process Control

Progress in computer control of flotation circuits has developed parallel with advances in reliability of on-stream X-ray analysis (Cooper, 1976). Attainment of acceptable results with X-ray fluorescence analysis over the past ten years has led to application of computer control in more than 30 concentrators. Gains in applying flotation control also have given incentive to improving measurement and control devices for other essential functions in control systems. At the same time, advancing technology has made available computer systems having characteristics practical and economical for the physical environments of concentrators and ore processing plants. Benefits from flotation control have centered on increased efficiency in mineral separations, derived by stabilizing circuit operation subject to changing ore characteristics. The gains have been most evident in processing complex ores for multiple concentrate products. In many cases, particularly when coupled with grinding control, the economic results from on-line control have been substantial compared to investments in monitoring and control equipment.