Both wet and dry granulation are core technologies in fertilizer granulation, both relying on fertilizer granulators to shape raw materials. However, wet granulation is better suited for bio-organic fertilizer production lines. With its outstanding molding and adaptability, it better meets the needs of large-scale, high-quality fertilizer production, is compatible with complex formulations, and offers a higher overall cost-effectiveness.
Superior molding effect and stable granule quality. Wet granulation, using binders and moisture, achieves thorough bonding of raw materials, resulting in uniform, rounded granules with moderate strength and low storage and transportation losses; fertilizer dry granulation technology relies on purely physical extrusion, and even with supporting granulation equipment, it is prone to problems such as uneven granules and insufficient strength.
Wider raw material compatibility and compatibility with complex formulations. The fertilizer granulators used in wet granulation can handle high-humidity, high-viscosity raw materials, adapting to the diverse processing needs of bio-organic fertilizer production lines, and allowing for flexible combinations of organic, inorganic, and trace elements; dry granulation has stringent requirements for raw materials, limiting formula adjustments.
Better finished product solubility, meeting absorption needs. In wet granulation, moisture and binders allow nutrients to fully integrate, dissolving evenly in water, which is beneficial for crop absorption; dry granulation is prone to problems such as uneven nutrient distribution and inconsistent dissolution rates, affecting fertilization effectiveness.
Although wet granulation requires an additional drying step and requires a dedicated fertilizer granulator for bio-organic fertilizer production lines, its overall molding rate, quality stability, and formula flexibility still make it the more versatile choice for large-scale, high-quality fertilizer granulation.