The double-roller press granulation production line is a mainstream system in the field of dry granulation, widely used for processing materials such as compound fertilizers and chemical powders. The entire line operates without the need for water or binders, relying instead on physical extrusion for shaping; this ensures energy efficiency, high productivity, and consistent product quality. The stable operation of the line and the quality of the final product depend entirely on the synergy of four core pieces of equipment; each performs its specific function and operates in precise coordination to form a complete granulation process.

The double-roller press granulator serves as the heart of the production line, determining both granulation efficiency and granule quality. At its core is a pair of alloy rollers that rotate synchronously towards each other; these rollers undergo laser quenching and hardening treatments, resulting in exceptional wear resistance. During operation, a hydraulic system provides stable, high pressure; as powder enters the gap between the rollers, it is compressed into a dense sheet-like slab and shaped via grooves on the roller surfaces. A high-precision drive system controls roller speed synchronization, while an adjustable roller gap structure accommodates various materials, ensuring uniform granule strength and a granulation rate exceeding 95%.
A stable feeding system forms the foundation for smooth production line operation, with the uniform feeder serving as the key component. This device precisely controls material flow, enabling consistent, continuous, and metered feeding, thereby eliminating issues associated with manual feeding—such as uneven material distribution, clogging, and idling. A constant feed rate maintains stable pressure within the granulator, effectively improving granule uniformity, reducing equipment wear, and ensuring long-term continuous operation.
Crushing and sizing equipment handles the post-forming refinement of granules, playing a crucial role in enhancing the final product's appearance. Sheet-like material discharged from the granulator enters the crushing chamber, where specialized crushing rollers shear and knead it into uniform granules while breaking apart any agglomerated material. Equipped with customizable screens, the machine allows for the adjustment of granule specifications and the removal of oversized clumps, ensuring uniform size and regular shape to meet diverse production standards.
As the final core component, the rotary screening machine is responsible for product grading and material recycling. The screening machine precisely separates qualified granules, fine powder, and substandard products; qualified granules are discharged, while fine powder and substandard materials are recirculated to the feed end for re-granulation. This closed-loop screening system significantly reduces material waste, improves raw material utilization, lowers the rate of product reprocessing, and ensures high-yield, low-consumption production line operation.
The precise coordination of four core pieces of equipment gives the roller extrusion granulation line advantages such as strong adaptability, low energy consumption, and high product strength, making it the preferred choice for small and medium-sized granulation projects.