Granular organic fertilizer has become a mainstream choice in modern agriculture due to its balanced nutrients, resistance to caking, ease of application, and convenience in storage and transport.A complete granular organic fertilizer production line follows a production workflow comprising raw material pre-treatment, mixing and granulation, drying and cooling, and screening and packaging; integrated with supporting auxiliary equipment, it enables automated and standardized production. While the configuration can be flexibly adjusted based on annual production scales ranging from 10,000 to 100,000 tons, the core equipment remains largely the same.
Raw material pretreatment equipment forms the foundation of the line, primarily comprising compost turners, crushers, and batching systems. Compost turners facilitate the aerobic fermentation and decomposition of materials such as livestock manure, crop straw, and sludge, eliminating harmful substances and enhancing fertilizer efficacy; crawler-type compost turners are typically used for small-scale lines, while large-wheel compost turners suit medium-to-large-scale operations. Decomposed materials often contain clumps, requiring processing via half-wet material crushers or cage crushers to achieve a uniform particle size, which ensures optimal subsequent granulation. Automated batching machines allow for the precise mixing of various raw materials, ensuring a stable nutrient ratio.
The mixing and granulation system is critical for shaping the product, featuring twin-shaft paddle mixers and organic fertilizer granulators as core components. The mixer thoroughly blends the crushed raw materials, adjusting moisture content and uniformity to prepare the material for granulation. Granulators—such as disc granulators or new type organic fertilizer granulators—process the powdered material into standard 2–6 mm granules; these machines deliver high shaping rates and produce smooth, round granules, accommodating diverse raw materials and production needs—a key feature distinguishing this process from powdered organic fertilizer production.
Post-processing equipment determines the quality of the final product, encompassing drying, cooling, screening, and packaging units. Freshly formed granules have high moisture content and must pass through a drum dryer to reduce moisture levels and prevent caking during storage. Subsequently, a drum cooler rapidly lowers the temperature to stabilize the granule properties. The cooled granules are fed into a drum screener to separate out qualified product, while undersized fines and oversized particles are recycled for reprocessing. Finally, an automatic quantitative packaging machine handles weighing and bag stitching, completing the automated packaging process.
The complete production line incorporates auxiliary systems—such as belt conveyors and bucket elevators—to automate material transfer between processing stages and minimize manual intervention. It also features dust removal equipment to manage airborne particulates and an integrated electrical control system for centralized operation, ensuring efficient, eco-friendly, and stable performance. This configuration balances practicality with cost-effectiveness, making it suitable for organic fertilizer production operations of all scales—large, medium, and small.
