A client operating a large agricultural materials enterprise planned to build an efficient compound fertilizer production line to meet the local agricultural demand for compound fertilizers. Based on market demand and site conditions, a 10t/h compound fertilizer production line was designed, equipped with raw material batching machines, mixers, granulators, dryers, coolers and other equipment. The production line adopts the spray granulation process, which is selected for its high granulation rate and uniform nutrient content.