The production of compound fertilizer by urea melt spraying granulation is a viscous raw material and participates in the granulation process as a liquid phase. It can provide certain heat energy, increase the temperature of the material during granulation, reduce the moisture content of the material, facilitate the pelleting and drying, greatly reduce the drying load and reduce the production cost. This process is between the pellet method and the slurry method. Meanwhile, it has the advantages of both. It can significantly increase the production output, and the product particles are round and smooth, high strength, and not easy to cake. In production, it has strong adaptability to raw materials and formulations, can produce compound fertilizers with high nitrogen content, and the products produced have wide adaptability.

The process flow：