2026/01/29
The core differences between NPK fertilizer granualtor machines and organic fertilizer granaultor machines stem from the characteristics of their raw materials (NPK uses chemical raw materials, while organic fertilizers use organic matter). These differences are reflected in equipment selection, structural design, process parameters, and core configurations, adapting to different granulation needs. The specific differences are as follows:
1. Raw Material Adaptability: NPK granulators handle low-viscosity, easily dispersed chemical raw materials, focusing on preventing segregation and maintaining uniform particle size; organic fertilizer granulators are adapted to high-viscosity, coarse-fiber-containing organic raw materials, focusing on preventing wall adhesion and facilitating discharge, requiring stronger crushing and mixing capabilities.
2. Different Mainstream Models: NPK granulation mainly uses rotary drum granulators and double roller press granulators. Rotary drums are suitable for large-scale production, while roller extruders are suitable for dry granulation without binders, ensuring nutrient uniformity; organic fertilizer granulation mainly uses disc granulators and flat die/ring die granulators. Disc granulators are suitable for small to medium capacities, and granulators can compress coarse fiber raw materials into dense granules, improving the molding rate.
3. Structural Design Differences: NPK granulators have smooth inner walls and a non-stick design, equipped with a precise atomizing spray system for high-precision moisture control; organic fertilizer granulators have anti-sticking liners (rubber/polyurethane) on the inner wall, a scraper cleaning device, and a larger torque mixing paddle to adapt to the adhesive properties of the raw materials.
4. Different Process Parameters: NPK granulation requires 3%-6% moisture content, a rotation speed of 8-15 rpm, and a small amount of binder (0.5%-2%); organic fertilizer granulation requires 15%-25% moisture content, a lower rotation speed (5-10 rpm), relying on the inherent viscosity of the organic matter, and sometimes requiring the addition of auxiliary materials such as straw powder to adjust viscosity.
5. Different Core Configurations: NPK granulators are equipped with high-precision metering and online particle size monitoring equipment to ensure uniform nutrient distribution and particle size; organic fertilizer granulators are equipped with powerful crushers and horizontal mixers, and a drying and cooling system to address the problems of coarse fibers and high moisture content in the raw materials.
