The optimized overall control system developed by VAI for sinter plants integrates mathematical models and artificial intelligence. It features a process information system and a collection of on-line process models. One group of models is used for the control of sinter productivity and the other group for the control of sinter quality. The setpoints calculated in that way control the sinter plant operation directly. The different modules included in the system are described in the case of the Wuhan Iron and Steel Co. sinter plant in China.