Modern agriculture increasingly demands compound fertilizers with stable nutrient content, uniform granule size, and reliable supply. A comprehensive NPK fertilizer production line integrates the entire process—batching, mixing, granulation, drying, cooling, screening, coating, and packaging—enabling manufacturers to achieve standardized, automated production. Huaqiang Heavy Industry’s one-stop NPK fertilizer production line solution leverages proven processes and specialized equipment to streamline operations and reduce labor costs, while remaining adaptable to various production capacity requirements and raw material formulations.

The production line begins with an automated batching system. Raw materials such as urea, monoammonium phosphate (MAP), and potassium chloride undergo preliminary crushing before being precisely measured by PLC-controlled weigh feeders. These materials are automatically proportioned according to specific crop formulations, effectively eliminating human error and ensuring a stable NPK nutrient ratio. The proportioned materials are then fed into a twin-shaft mixer, where they are thoroughly blended to create a uniform mixture, laying the groundwork for the subsequent granulation stage.
Granulation is the core of the entire production line. Depending on client needs, the system can be configured with different granulation technologies: rotary drum granulation is ideal for high-capacity wet granulation, producing round, well-formed granules; alternatively, roller extrusion granulation—a dry process—requires no added water and offers lower energy consumption, making it well-suited for small-to-medium-scale projects. The wet granules are then fed into a rotary dryer, where hot air removes excess moisture to prevent the finished product from caking. Subsequently, the granules pass through a cooler to stabilize their physical properties, ensuring they do not absorb moisture during high-temperature packaging.
Once cooled, the granules enter a vibrating screen, which separates them by size. Oversized granules are crushed again, while fine particles are recycled back into the granulation process, creating a closed-loop system that maximizes raw material utilization. For enhanced storage stability, an optional coating process can be added to apply an anti-caking agent, thereby extending the fertilizer's shelf life. Finally, the qualified product is conveyed to a fully automated quantitative packaging unit, which handles weighing, bagging, and sealing, preparing the finished fertilizer for immediate warehousing or shipment. The entire production line is equipped with a centralized control system that monitors key parameters—such as ingredient ratios, temperature, and rotational speeds—in real time. It also features integrated dust-removal equipment to manage emissions and ensure compliance with environmental standards. This one-stop solution offers customizable production capacity and end-to-end delivery, covering everything from facility layout and installation/commissioning to after-sales maintenance, sparing clients the need to coordinate with multiple suppliers.
In an increasingly competitive fertilizer market, a stable and controllable production process is the cornerstone of product competitiveness. The NPK fertilizer production line from Huaqiang Heavy Industry integrates disparate processes into a seamless, automated workflow. Balancing production capacity, product quality, and environmental responsibility, it enables compound fertilizer manufacturers to consistently produce high-quality granular fertilizers, effectively serving the large-scale agricultural market.