Process characteristics of roll extruding granulator for organic fertilizer

1. Low energy consumption of organic fertilizer roller granulator: extrusion granulation is the granulation of materials at room temperature. Compared with other granulation methods, it does not require drying measures such as fuel oil and gas. The production only requires power consumption and a small amount of cooling water (for roller shaft cooling), and the power consumption per ton of product is only about 30 kW/h.

2. There is no need to add adhesive to the organic fertilizer roller granulator: other granulation processes are basically wet processes, which must have a drying process, with high energy consumption and high product moisture. However, dry granulation does not require additional additives, but only uses the intermolecular force of the material itself, simplifying the process and reducing energy consumption.

3. The investment of the organic fertilizer roller granulator is low: because the drying process is omitted, and the return ratio is low (accounting for about 35% of the total feed of the extruder), the process flow is simple and the investment is low.

4. Wide range of applicable raw material particle specifications: extrusion granulation has no special requirements on the particle size of raw materials. Both 1~4mm granular materials and fine powder materials can be used. Unqualified powder materials and powder products can be better used, and the cost can be reduced by using powder materials.

5. Wide capacity range of organic fertilizer roller type extrusion granulator: for the extrusion granulator, the effect of economic scale is not obvious, and the unit capacity of 1~50 t/(h. set) can be economically designed, so the applicable capacity range is wide.

The only disadvantage of producing granular fertilizer by roller extrusion granulation is that the product shape is irregular particles, but the irregular particle shape has no effect on the application of fertilizer, and the dressing process can be added to further round the particles. The fertilizer produced by extrusion granulation has sufficient strength, less dust, no agglomeration, narrow particle size distribution range, and good fluidity, so it has good economic benefits.