Production Advantage of NPK Compound Fertilizer with Roller Granulator

NPK compound fertilizer production mainly deals with raw materials in the state of powder, bulk, solution and molten liquid to produce particles with certain shape and size. Fertilizer granulator machine is an important equipment for compound fertilizer processing. Generally speaking, many parameters of fertilizer granulator can be adjusted, so it can adapt to a large range of raw materials.

Although many conventional compound fertilizer equipments still use wet granulation process to produce spherical pellet fertilizer, extrusion granulation process has many advantages, among which the most important is: low energy consumption of roller granulator NPK fertilizer production process, no need for liquid binder in granulation, many kinds of raw materials can be used, and the composition of raw materials is flexible. The function of roller fertilizer granulator is applicable to a wide range of large or small devices. Therefore, extrusion granulation NPK fertilizer production process has attracted more and more interest. Many fertilizer factories are considering dry extrusion NPK fertilizer production granulation process in construction.


In dry roller granulator equipment, the powder is applied force and compacted between two pairs of rollers. As with powder material, the quality requirement of roller granulator is reasonable formula, all kinds of components are complete and mixed evenly.In addition, the quality of particles produced by the double roller fertilizer granulator has the following two indicators:

1. Hardness
Generally speaking, manufacturers usually want the particles to be harder. But whether from the point of view of use effect or manufacturing cost, it can not be said that the harder the better. The particle hardness produced by the double roller fertilizer granulator can be measured by the particle hardness meter and expressed by the pressure. According to the variety of materials, it is generally 0.06-0-12 MPa.

2. Powdered rate
The method of determining the pulverization rate is to put a certain number of finished granules in a special pulverization rate measuring instrument, and turn them over at a prescribed speed in a prescribed time, and then determine the proportion of the powder transformed from granules in all materials. Generally, the powdered rate should not exceed 10% and the quality product should not exceed 5%.

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