Many people have encountered the problem of fertilizer agglomeration. In particular, fertilizers piled up in the warehouse for a period of time are most likely to agglomerate, and the longer the time, the more serious the agglomeration.

 

It is not good to say that the fertilizer agglomeration is sold. In the eyes of farmers, the agglomeration is fake fertilizer, so many dealers have to arrange workers to beat the sticks, which takes time and effort. The manufacturer will be yelled at the dealer for the return of the product due to the problem of agglomeration.

 

What is the reason for fertilizer agglomeration?

 

1. Firstly, the raw materials are analyzed, mainly because the raw materials are easily soluble

 

Generally speaking, the main raw materials for compound (mixed) fertilizer production are urea, ammonium chloride, ammonium nitrate, ammonium sulfate, diammonium phosphate, monoammonium phosphate, calcium superphosphate, potassium chloride, potassium sulfate, etc. Compound (mixed) fertilizers made from these soluble fertilizers tend to agglomerate during storage and transportation.

 

2. Other factors affecting fertilizer agglomeration

 

1） High fertilizer moisture content

 

The moisture content of the fertilizer is the biggest factor in the agglomeration of the fertilizer during storage. The higher the moisture content, the easier the salt in the fertilizer granules dissolves and the easier the physicochemical reaction occurs. -The crystallization process will cause severe agglomeration.

 

2) Uneven particle size and low compressive strength of the particles

 

Fertilizer particles are too small or the particle size is uneven, the gap between the particles is small, the specific surface area is large, and the contact area between the particles is large, it is easy to agglomerate.

 

If the compressive strength of the fertilizer particles is low, the fertilizer is easily deformed and broken during packaging, transportation and storage, which will increase the contact area between the particles and also easily lead to fertilizer agglomeration.

 

3) Pressure between fertilizers during stacking

 

When the fertilizer is stored, the particles are in close contact with each other under the action of gravity, which is easy to deform. The pile height is about high. The greater the pressure on the fertilizer, the more indirect contact of the particles and the easier the agglomeration.

 

4) Long storage time

 

The longer the storage time of the fertilizer product, the more recrystallization of the surface of the fertilizer particles? The more the dissolution process is carried out, plus a long time under a certain pressure, the tendency to agglomerate is obvious.

 

5) High packaging temperature

 

The packaging temperature is high, the finished product is not cooled sufficiently, and the internal moisture of the product is not fully released. In addition, when the temperature is high, the solubility of the corresponding salt is large. During storage, as the temperature decreases, the solubility of the salt decreases. Precipitated crystals, resulting in crystal bridges, causing agglomeration.

 

6) There is a lot of fertilizer powder during packaging

 

During the cooling and packaging of fertilizer granules, friction between the granules will produce a certain amount of dust. The dust exists between the granules, which acts as a "bridge" to increase the contact area between the fertilizer granules and also cause compaction.

 

How to effectively prevent fertilizer from clumping?

 

First look at the producer

 

1. Reduce the moisture content of the fertilizer and the packaging temperature, through the heating of the dryer and the dehumidification and cooling of the dehumidification unit and the installation of air conditioning, etc., to control the fertilizer moisture below 0, 6%, extend the fertilizer cooling time, and reduce the packaging temperature.

 

2. Add anti-caking agent to the raw materials to reduce the physical and chemical reaction between particles.

 

3. Through the transformation of the screening system, the uniformity of the fertilizer particles is further improved.

 

4. Reduce the height of manure storage and stacking, and reduce the storage pressure.