The granulation process of roller extrusion granulator in NPK compound fertilizer production line

 The NPK compound fertilizer production line roller extrusion granulator uses dry extrusion technology to compress powdery materials with a moisture content of less than 20% into flakes, and then undergoes crushing, granulation, and screening processes to turn the block shaped materials into granular materials that meet the usage requirements. Dry rolling granulation mainly relies on external pressure to force the material to pass through the gap between two relatively rotating rollers and compress into pieces. During the rolling process, the actual density of the material can increase by 1.5 to 3 times, thereby achieving a certain strength requirement.

What are the granulation shapes of the roller extrusion granulator on the NPK compound fertilizer production line?

The particle size of the finished product can be adjusted in a large range by changing the sieve plate aperture of the crushing and pelletizing machine. The roller skin can be customized according to the customer's requirements to extrude particles of different shapes, such as spherical, capsule shaped, Corn kernel shaped, rod shaped, etc. Also, patterns and anti-counterfeiting marks can be carved according to the customer's requirements. The size of the roller skin ball socket determines the size of the material diameter, which is generally 3-8mm.

Application scope of roller extrusion granulator for NPK compound fertilizer production line:

Wide adaptability of raw materials, suitable for granulation of various raw materials such as compound fertilizers, pharmaceuticals, chemicals, feed, etc., with high product granulation rate. It can produce compound fertilizers of various concentrations and types (including Manure, inorganic fertilizer, biological fertilizer, magnetized fertilizer, etc.). Especially for the granulation of rare earth, potassium fertilizer, and ammonium carbonate series compound fertilizers.

The granulation steps of the NPK compound fertilizer production line are as follows:

1. Extrude the powder into compact plates with a roller press.

2. The compact plates are crushed and granulated by granulator.

3. Use a screening machine to screen out finished particles.

NPK compound fertilizer production line roll to roll extrusion granulator roll:

1. The double roller pressure determines the particle strength, and the size of the extrusion pressure can be adjusted according to the needs of the granulation operation.

2. The roller speed is adjusted by changing the belt pulley transmission ratio between the motor and the reducer.

3. The roller skin adopts a new wear-resistant material