Fertilizer Granulation Technology Brief Introduction

Most basic disc granulation

After mixing all the raw materials into the granulation device, it is a sloping disc. The rotating disc is rotated by a viscous material (a good ammonium or additive is a sticky soil) and the spray water is rolled into granules and dried. Screening is fertilizer

Advantages of the equipment is simple and hundreds of thousands of things to get, the formula needs to have viscous materials, there are certain formula restrictions, suotable to do low concentration.

Drum granulation

Drum granulation is a slanting cylinder in the granulation device. Just like a plurality of discs overlap, the granulation efficiency is high, and steam can be used. The viscosity between the materials in the reactor can be increased due to water vapor filling. Granulation efficiency. The recipe limits are smaller than the above. It is also possible to use spray partially and ammoniation partially.

Extrusion granulation

The form of extrusion granulation can be two types: roll type and rim type. For roll type extrusion, it is first pressed into large pieces and then broken into particles, so that the device has large capacity, high particle strength and low energy consumption. Roller extrusion is widely used abroad. The rim type is to directly extrude the material into a cylindrical strip shape in the die plate, and then cut into cylindrical particles. The extrusion granulation method currently used in China is mostly rim granulation method, because of its small production scale. The maximum capacity of a single machine can only reach 3-5 t/h, and the granulation strength is limited, the mold is easy to damage, the cylindrical particles are produced, the fluidity is poor, and the domestic development is slow. The rim granulation process has been eliminated abroad. Extrusion granulation as discussed in this report refers to the granule strength of the granules formed by roll extrusion granulation extrusion granulation mainly by the force between molecules.