Raw material grinding device for thermal micro-expansion cement production

The raw material grinding device comprises a mounting frame, a grinding box body and a quantifying box, supporting legs are welded to the lower surface of the grinding box body, a fixing frame is inserted into the grinding box body, a filter screen is inserted into the fixing frame, a fixing bolt is in threaded connection with the upper surface of the fixing frame, and the fixing bolt is in threaded connection with the lower surface of the fixing frame. The mounting frame is mounted on the inner wall of the grinding box body and located above the fixing frame, a grinding wheel is rotationallyconnected into the mounting frame, a second brush is fixed to the position, located below the fixing frame, of the inner wall of the grinding box body, a first brush is fixed to the inner wall of theside, away from the mounting frame, of the grinding box body, and a fixing rod is fixed to the lower surface of the quantitative box. A supporting plate is fixed to the lower surface of the fixing rod, the supporting plate is