The project is located in Chengdu, Sichuan Province, and the project name is the supporting project of 1000-1200 tons of sand and gravel aggregate production line for airport construction. The project is constructed and operated by Sichuan Xinyida Machinery Co., Ltd. in EPC0 cooperation mode. The raw material of the project is limestone, which adopts four stage crushing, three stage screening and water washing production processes, and is equipped with crushing, sand making, water washing and screening equipment such as rotary crusher, multi cylinder hydraulic cone crusher, vertical shaft impact crusher, dehydrated tailings recovery integrated machine, etc.