The NPK fertilizer production
process can be divided into: raw material batching, raw material mixing, raw material granulation, granule drying, granule cooling, particle grading, finished product coating, and final product packaging.
Raw material mixing: Stir the prepared raw materials evenly to increase the uniform fertilizer content of the fertilizer particles.
Raw material granulation: The uniformly stirred raw materials are fed to a fertilizer granulator machine
for granulation (a drum granulator can also be used, and extrusion granulation can also be used).
Granule drying: The granules produced by the fertilizer granulator machine are sent to the dryer to dry the moisture contained in the granules, increasing the strength of the granules and facilitating storage.
Particle cooling: The temperature of the fertilizer particles after drying is too high, easy to agglomerate, and after cooling, it is convenient for bagging preservation and transportation.
Particle classification: The cooled particles are classified, and the unqualified particles are pulverized and regranulated, and the qualified products are sieved out.
Finished coating: Applying a qualified product to the coating to increase the brightness and roundness of the particles.
Finished packaging: Store the finished coating granules in a ventilated place.
The screening machine
is common equipment used in the production of NPK fertilizer production. It is mainly used for the separation of finished products and return materials. It can also realize the grading of products and evenly classify finished products. The machine adopts a combined screen for easy maintenance and replacement. The utility model has the advantages of simple structure, convenient operation and stable operation, and is ideal equipment in the NPK fertilizer production.
Structure and advantages:
1. Rack part: The machine frame is welded with excellent carbon steel plate and channel steel, and has passed strict product qualification certification and specific process requirements, which has reached the purpose of using this machine;
2. Transmission screening part: This part adopts a combined screen, which is transmitted from the transmission wheel to the main shaft through the coupling, and the screen is installed and welded on the rolling cage of the main shaft. The material enters from the feeding end, and the rolling cage continuously rotates and grades, and uniformly flows out from the lower discharging port, which effectively separates the finished product from the returning material, thereby reducing labor intensity;
3. Transmission connection part: The motor drives the pulley, the V-belt and the reducer to drive the spindle to rotate. The transmission reducer and the working part of the main machine are all driven by the pin-type coupling, which is convenient for assembly and maintenance.