Control system and method for cement ingredients

A control system for cement ingredients disclosed in the invention comprises raw material devices, a conveying device and a ball grinder. The system is characterized by that: a time-delay control circuit comprises a starting control circuit and a stopping control circuit; the starting control circuit comprises bistable relays and time-delay controllers, the output terminal of each time-delay controller is connected with the input terminal of each bistable relay; the stopping control circuit comprises time-delay controllers, and the time-delay controllers are connected with the bistable relaysrespectively. The control method comprises the following steps that: a, setting the number of the raw material devices to be N, wherein, N is more than or equal to 2; b, starting the conveying device, then starting the No.1 raw material device; c, after starting the No. N-1 raw material device, starting the No.N raw material device after the period of TN-1+delta tN-1-TN; d, from stopping the No.N-1 raw material device, st