Cement raw material grinding system and process

The invention discloses a cement raw material grinding system and process, the cement raw material grinding system comprises a first powder concentrator, a roller press, a feeding mechanism and a separation mechanism, a discharge port of the roller press is communicated with the first powder concentrator, ground materials enter the first powder concentrator for separation, a discharge port of the first powder concentrator is communicated with the roller press, and the roller press is communicated with the separation mechanism. A first material generated after sorting enters the roller press to be ground, and the feeding mechanism selectively conveys the material to the first powder concentrator and/or the roller press. The feeding direction is adjusted according to the humidity of the raw materials, the raw materials are conveyed to the first powder selecting machine and/or the roller press, the amount of the materials entering the first powder selecting machine can be adjusted, the powder selecting space of