The new type organic fertilizer granualtor integrates intelligent control and structural optimization based on the traditional granulation principle. Its core principle is to use the synergistic effect of mechanical force and material properties to agglomerate loose organic fertilizer raw materials (such as well-rotted manure, straw powder, etc.) into granules with a certain strength and size. The specific process can be divided into three key stages:

1. Raw material pretreatment and conditioning: The raw materials are first crushed and sieved to ensure uniform particle size (usually ≤3mm). Then, the moisture content is adjusted by an intelligent conditioning system (controlled at 25%~35%), and a small amount of natural binder (such as wood ash, bentonite) is added according to the characteristics of the raw materials.

2. Mechanical Agglomeration into Granules

Most mainstream new organic fertilizer equipment adopts a "compression-spheroidization" composite process:

Extrusion Stage: The material enters a twin-screw or roller extrusion device and is compressed into dense strips under high pressure (usually 5~15MPa). The material is initially shaped using its own plasticity and the adhesive properties of the binder.

Spheroidization Stage: The strip-shaped material enters a rotating cylinder (or disc), where it collides and rubs against each other through centrifugal force and friction, gradually becoming rounded into granules with uniform particle size (usually 2~6mm). Simultaneously, burrs are removed by scrapers on the cylinder wall, improving the roundness of the granules.

3. Intelligent Control and Forming Guarantee

The equipment is equipped with a PLC control system that collects data such as extrusion pressure, cylinder speed, and material flow rate in real time. It automatically adjusts the screw speed (50~150r/min) or roller inclination angle (3°~8°) to ensure stable granule strength (compressive strength ≥2N) and pass rate (≥90%). Simultaneously, a negative pressure dust removal system reduces dust, and a vibrating screen is installed at the discharge port to return substandard particles for regranulation, achieving closed-loop production.

This principle retains the core of mechanical agglomeration in traditional granulation while solving problems such as high viscosity, easy agglomeration, and difficulty in retaining biological activity in organic fertilizer raw materials through intelligent conditioning, composite molding, and precise control, thus achieving efficient and high-quality granulation.