The project is located in Tonghua City, Jilin Province, China. It is a common mine crushing project, mainly producing construction aggregates below 3 cm. First, the limestone raw materials are evenly fed into the XGN-Z series 1512 heavy hammer crusher through the raw material warehouse under the action of the ZGCX series 1238 vibrating feeder for shaping and crushing, and then transported by the belt conveyor to 4 YKQ series 3070 vibrating screens for screening. Aggregates that meet the finished product specifications are directly sent to the finished product area, and stones larger than the finished product specifications are returned for crushing again, and finally the sand and gravel products of different specifications required by the user are obtained.