The main function of the mixing system in the concrete mixing plant (concrete batching plant) is to mix the raw materials such as gravel, cement, water and admixture in the mixer to form the finished concrete with the specified strength.

The mixing system mainly has a forced concrete mixer and a double horizontal shaft mixer.

The double horizontal shaft stirrer is developed on the basis of a single horizontal shaft. There are two horizontal rotary shafts with synchronous rotation. The rotation direction of the double shaft is opposite, and the rotation direction of the blade is opposite to that of the blade. Tube in the formation of reflux, stirring more strongly. Discharge system has hydraulic drive discharge system and pneumatic drive discharge system two common forms, unloading door action automatically, the general set fully open, fully closed, half open three states.

The forced mixer is not agitated by gravity, but is forced to stir the material by means of a stirring blade. The stirring blade may be a shovel type or a spiral belt type. The blade can be rotated about the horizontal axis or around the vertical axis. The agitation strength of this mixer is determined by the blade speed.