The core working principle of a roller press granualtor is to extrude dry powder materials into shapes using mechanical pressure. After pretreatment (such as uniform mixing and humidity adjustment), the material enters the extrusion chamber. A pair of counter-rotating rollers (or screws) generate high pressure, causing the material particles to overcome internal friction and be extruded into strips, blocks, or other shapes through the roller die holes (or extrusion cavity). These are then further crushed and screened to ultimately form uniformly sized granular fertilizer.

This physical forming method does not require the addition of excessive binders, preserving the original components of the material to the greatest extent possible. It is particularly suitable for fertilizer production containing heat-sensitive or volatile components. Compared to traditional granulation processes, its forming process has the advantages of low energy consumption and high efficiency. Furthermore, it allows for flexible adjustment of roller parameters (such as speed, pressure, and die hole size) to adapt to different material characteristics and granule size requirements, providing broader process adaptability and product diversity for fertilizer production.

For fertilizer machine manufacturers, transforming this technological advantage into market competitiveness requires a comprehensive approach across multiple dimensions, including technological research and development, product customization, and service system construction. In terms of technological research and development, continuous investment in funds and talent is necessary. This includes optimizing roller materials and surface treatment processes based on the material characteristics of different fertilizer types (such as organic-inorganic compound fertilizers and bio-organic fertilizers), improving die hole design precision and wear resistance, thereby extending equipment lifespan and ensuring the stability of granulated products.