Fertilizers are essential for plant growth and germination. They consist of organic and inorganic substances that provide nutrients to plants, increasing crop yields. Fertilizers are composed of various inorganic and organic materials. The production of fertilizer granules is one of the processes involved in fertilizer manufacturing.

There are several methods of fertilizer granulation, including extrusion granulation, rotary granulation, spray granulation, drum granulation, and compaction-cutting. Here is a brief description of these five granulation methods:

1. Extrusion granulation: This is a common method where moist fertilizer materials are fed into an extrusion machine. Through the extrusion process, the materials are forced through a die opening, resulting in the formation of granules. Extrusion granulation is suitable for materials with adhesive properties, such as organic fertilizers.

2. Rotary granulation: This is a widely used method where moist fertilizer materials are placed in a rotary granulator. Under the action of a rotating disc, the materials gradually form granules. Rotary granulation is suitable for materials with higher particle size requirements.

3. Spray granulation: This is a common method where a fertilizer solution or suspension is sprayed into a drying tower through a spray device. During the drying process, the fertilizer particles gradually form. Spray granulation is suitable for materials with higher solubility.

4. Drum granulation: This is a commonly used method where moist fertilizer materials are placed in a drum granulator. Under the action of the drum, the materials gradually form granules. Drum granulation is suitable for relatively hard fertilizer materials.

5. Compaction-cutting: This is a common method where moist fertilizer materials are fed into a compaction-cutting machine. Through the combined action of compaction and cutting, the materials are formed into granules. This method is suitable for materials with certain adhesive properties.

Summarize

When considering which method to use for fertilizer production, factors such as the impact on nutrient content and the properties of the fertilizer materials, particle size requirements, and production scale need to be taken into account.