What are the differences between dry granulation and wet granulation in fertilizer production?
Granulation is a crucial step in the fertilizer production line , directly affecting product form, application effectiveness, and production efficiency. Dry granulation and wet granulation, as two mainstream processes, differ significantly in technical logic, production conditions, and applicable scenarios. Understanding these differences is crucial for fertilizer companies in selecting the appropriate process. The core differences lie in the process principles and raw material requirements. Dry granulation does not require additional water, relying on the inherent binding properties of the fertilizer raw materials or a small amount of binder. Granulation is completed through extrusion, crushing, and screening. The raw material moisture content must be strictly controlled at 8%-12%; excessive moisture can lead to clumping and equipment blockage. Wet granulation requires adding water or a binder solution to the raw materials to create a plastic state, which is then rolled into gra...