The significance of compound fertilizer powder granulation technology
Powder granulation technology is one of the most important branches of powder and granule process. With the environmental protection demand and the automation of the production process, its importance is increasingly evident. "Powdering of powdered products" has become an inevitable trend in the world's powder after treatment technology. The processing of the strength of particles in powder products is mainly reflected in three aspects:
First, reduce dust pollution and improve working conditions.
Second, to meet the production process requirements, such as increasing porosity and specific surface area, improving heat transfer and so on.
Third, improve the physical properties of the product (such as fluidity, gas permeability, bulk density) to avoid subsequent operations (drying, screening, metering) and use process (metering, ingredients, etc.) segregation, pulsation, agglomeration, bridging, etc. Adverse effects, reduced pollution, improved appearance, improved flow, ease of storage and transportation, control of solubility, control of porosity and specific surface area, etc., create conditions for automation and containment of production and use processes.
The compound fertilizer granulator adopts the coating film wrapping technology after granulation. This technology uses high-quality wrapped powder to make the product after coating and greatly reduce the moisture absorption of the finished product and the adhesion between the particles.，so there are good fluidity for various operations of fertilization, and the appearance quality is greatly improved, leaving a good impression for the purchaser.
DZJ series dry roller press granulator adopts dry roll pressing technology to compress powdery material with water content ≤5% into pieces or blocks, and then crushed and sieving and sieving process to make pieces The material becomes a granular material that meets the requirements for use. Dry roll granulation mainly relies on external pressurization to force the material to pass through the gap between two opposite rotating rolls, and is forced to compress into pieces. During the rolling process, the actual density of the material can be increased by 1.5~3 times, thereby achieving a defined particle strength requirement.
The main working mode of compound fertilizer drum granulator is wet granulation of pellets. After a certain amount of water or steam, the basic fertilizer is fully chemically reacted in the cylinder, and under certain liquid conditions, the cylinder is used. The rotary motion causes the squeezing force between the material particles to agglomerate into a ball.
These two fertilizer granulator machines are the most used granulators in the NPK fertilizer production, and customers can choose according to their actual needs.