Which granulation method is best suited for the large-scale production of NPK compound fertilizers?
Granulation is the core stage of NPK compound fertilizer production line s, directly determining granule uniformity, nutrient stability, production costs, and efficiency. Currently, the industry's mainstream granulation methods include rotary drum wet granulation, double-roller extrusion granulation, and pan granulation, each suited to different scenarios. When considering standard formulations, large-scale production, cost-effectiveness, and product quality, rotary drum wet granulation emerges as the optimal choice for the vast majority of NPK compound fertilizer production, while the other processes are suitable only for specialized, niche applications. Disc granulation is a traditional wet granulation process characterized by simple equipment structure, ease of operation, and low initial investment. It produces round, aesthetically pleasing granules and is suitable for standard NPK formulations, making it ideal for small-to-medium-sized fertilizer plants. However, the process ha...